73 Magazine February 1974 (#161)

don' t ever o r-i' IR S/FCC K EEP U P THE FIGH T b I appreciated your ra m blin g dis- sertelon o n the perils of the IRS - n keep up the fight . I also apprec iated n you r work in fight ing the FCC and in ) J:' keeping IU S posted on the latest. ins i st that you pr in t ev Lewis I.. I\h um Ro,..;('\' i ll.~ i\lN RE: DECEMBER COVER D IG ITA L IC ART ICL ES we goofed again The December cover with Linda WANTED LO G-PERI ODIC UPDATEmakes an attractive presentation to How about some articles on digital There is one item rega rd ing the lC's and thei r basic operations? Maybe cons t ruction o f L-Ps (Septem be r 73)the public as well as to us \"old ho w cou nters work , how to use a which should be stressed . T his is t hetimers.\" Such an idea put in to a d iode memory ,for generating code formonthly calendar wou ld increase the an automatic ident if ie r (T he ARRL importance of transposing betweenDXing. You all are to be com- FM and Repeater Ha nd boo k is poor in th is area). Also, maybe an article on t he e lements to ma ke it an e nd-fireplimented for an attractive cover do ne c ap tu re area, antenna gain, a nd how array. t hey're related (I haven 't been able toin fine taste. f ind anything o n th is). Maybe a n T his is accomp fished by e ither o f Art Grt\"enlt',lf WA I EQI two methods: 1. \"Criss-Cross\" o r Montpelier VT \" ro ll over\" the t wo -wi re center fe ede r, between e lements (180 ' phase re- NO MORE COVER-UPS article on regu lated power supplies versal) , o r, 2. Alternately transpose (trans istor) t oo . the feed to the elements. You 've done it aga in - a terrificcover and a terrific package of art ic les Keep up the good work on the I have illustrated both methods in maqazme. my articles but h ave evidently failedand ads! to stress the importance of this. l'rn gamel She's a beautiful gal and Jim Ku(·...i .~ WA91)YH South Ik-nd I N 4-6628 I have rec e ived two le tters stat ingwhat is behind the box is most t ha t t he writers h ad constructed L·Pstantatyzi ng! Here's my $3, and if you A DDITIONAL CALCU LATOR but did not get any forward gain, or A RT IC L ES WANT ED rather there appeared to be no for-only get $1 of it you 'lt be a millio n-aire over night. In some future issue Enjoyed very mu ch t he article in ward lobe. One writer who put up ayou might tell us just how close to a the December issue o n Calculators. I vertical mono-pole L-P sa id it was would like more articles on the same bi-directional off the sides with nomillion you came! subject, e. g., c hec king ou t a machine, gain off the fro nt. T his, of course, tun Al lhrigh l W6SLF how t o tell if it is defective, e tc. occurs if t he t ra nspo siti o n is no t made since the array is not then an e nd-f ir MOR E ON T H E COVER jo We...thci mcr WB6KlJC L·P, bu t is a bi-d irectional broadside Your November 73 cover is in very GOOD WORK a rray since a ll e lements are then inpoor taste, but does indicate the phase.mentality of the S t aff of 73 . Keep the presses rolling, your maga- In the case o f a horizontal (d ipo le Although I am not in ag reement zine is not o nly good readi ng but has type) L-P, maximum radiation wou ldwith Mr. Walker in many instances, convi nced several frie nds to pu t down be straight up and stra ight down (in toamateur magazines are not the place the CB rig and start readi ng the li cense the ground) if the elements are infor your kind of politics. manual. Keep up the good work . phase or are non-transposed . T here wou ld be no forwa rd lobe, nor wou ld Jo Wood W IAYG \"l ike Mekow ...ki \VA I<),\ 1K/ 3 there be any ga in except straight up. Arnold I\IA Under t his condit io n the antenna isI do wonder where you think the place CONGR ESS PAPER not a Loa-Periodic but is mere ly t heis for amateur radio p olitics if n ot in old \"fish bone\" antenna.the ham magazines? Perhaps you are Please send me the Congress Pape r. F. L Sm ith W4AEOused to le tting the government trod I will forward them to my Senator, as Lamden SCyou into the ground and wish to ju st soon as I receive them. and again . . .give up without a figh t, whether you Hopeful ly a large percentage o f t he CA LCU LATO R CO R R ECT IO NSare right or not. Thank heavens not all amateurs w il l do t he same.amateurs are that willing to knuckle You have a very fine magazine, Here a re some corrections to myunder. keep up the fine articles. Lots of luck December 73 Calculator article: . . .wayne t o Wayne in his battle with t he IRS. p. 98, 2 nd col., line 25 : $.010 should David W. J llbb WA 7KAI be $0.10. MORE OFF THE COV ER p. 102. 2nd col., line 8 : 0.001 seco nd Enclosed is the $3 I'm willing to CSers T A KE NOT E shou ld be 0 .000 1 second.pay to see what's behind the PACK - The FCC does take ac tion on t ips p . 102, 2 nd cot.. line 28: 552.85957AGE . A lso , I hope it helps build up agai nst CBers. I have been listeni ng should be 552.861277.your anti-IRS fund. If needed I' ll pay and lo gging about 15 -3 0 m inutes a p . 105 : In the two tables, the le fth a nd day on 1 1m since February 1973.newsstand prices for your magazine Recently I identified by \"handle\" colu mn has a number of dup lications.just to keep you going. Keep up the [pseu donv rn) , address, auto lic ense Whenever two consecutive lines havegood work. n u m ber and name 3 1 good o ld CBe rs. t he same text in column 1, c ross out I se nt my info rm ation to the Com- the tex t in this column on the second A I B. Cap lan K4A V<)/3 line of each pair. D D EC EN TRY BO F FO mission and have since hea rd from p . 106, 2nd col.. li ne 4 : should read,IBravo! Now that's a magazi ne t hem. Guess where their mobile en- \" . . . is 2.718055, whereas it is sup-cover. forceme nt un it is going t o strike soon? posed t o be 2.71828 18. Bob Wier WBt'lI ,I\IC/5 Joe Schlat ter K4F1vf / i Pe lt... A. S tark K20 A W Fort Wort h TX 1'111:\"'011 AZ ;\It. Ki.sco NYFEBRUARY 1974 99

J J ••• The fnllowil11! circuits IIm'(' appeared ill the reference d boo/~s. magaz ines, application notes, etc.W h il e lV\" try to reproduce all of t h e i niarma t i a n t h ai s hould be T1f'('(If' d by an experien ced ('(J/lsttll c/(Jr,/'('udc rs may wan t to Qpail t h e m selves of tll(' oriR inal S()IH'{·('.~ for p eac:e of mind. Readers are reque sted to pas.~ along an )' i n teresting circuits Owl 111(')' d iscol'cI\" in sources utller fila\"U .S. nom magarines, Circuits should be ori(·n fed toward amateur radio and experirnen tarion ratllerthan indu strial o r computer tectmotoev, Submit circuit witll all parts l 'olIlCS on it , a verv briefexplanation of tile circuit and an y additional parts infonnahon required, give tile source and a note ofpermission to reprint from tile copyrigllt holder, if any , and the reward for a published circuit will be a.-vchoice of a 73 baa/I . Send ~'ollr circuits to 73 Circuits Poee, 73 Jlagazine . Peterborough /I 030158 . UW ° 0+9 -, .\".'. •w. 0' '\"'00< ... 0' J!>V 8A ca o .~. J; ., ;1;00 '\" 001 'w ..,O. ;+;0c.r' • .1k .75V ITwo stage clipper/preamp will increase the talk An audio power amplifier with push pull output using a single transistor in the final stage may bepower of your rig. Transistors 0 1 and 02 are obtained with this simple circuit. Only abou t 50 mW is available from this amplifier, but the gain isHEP-54. The diodes are IN456 or HEP-158. flat up to 30 kHz. Both 01 and 02 sho uld be germaniu m audio transistors such as th e 2N404, SK3004 or HEP-253.V38 1/2 UN8 '\"\" co NO. 16 AWG '-0 5/16- DlA ) \",,~ \",. \" '\" ~,. \"'\" t1 \"6 .,. \". co o. J; -,A simp le noise lim iter that can be used with This simple one transistor superregenerative re-superregen de tec tors similar to tho se in th e Two'er ceiver for two meters may be used for copyingan d Six 'er. many local signals. With the components shown rhis receiver will tune from about 90 to 150 MHz. It may be used o n other freq uencies by changing th e inductor and capacitor Q1 is a GE·9 o r HEP-2.100 73 MAGAZ INE

+215'0' ,,~ KI ., - 10\" SIGMA 10 M .,24<., 2N0;1r;, IIF-23OO- GS IL 0' ., 0'\"\ 2N4220 \" IN4 0 0 1 4b 0' I\" ENERGI ZED\" .,., IV 01 \" DE- ENERGIZEO· '8K \~ MPS33.4 2N4 12~., G 2~!53 B2 +J.OV (\"I\" \" OUT CONTROL VOLTAGErtf\" .6 ,,~; r; Electronic control of a de relay. Circuit courtesyLong dura tion FET timer wh ich will give a delay Motorola Semiconductor Power Circuits Hand-up to 10 hours. Circuit courtesy Motorola Semi-conductor Power Circuits Handbook. book. ± IO V\"'~-\" Ll CI 0' ''''' 2+----' ~6 \"'Ii 190 pl C2t-------11f--+---4-----f \" .71C 4----1 --oOOUTPUT 4!5!5 kHI ~0' O'T,\", 0't-----1IIIf--+------.--., 4M! kHz' \" QI- 2\"'29215, 2N3392 01- 2N384,2N!52 !5, 501<3004, TH M0 3 FREQU£NCY \" Of t, 01 ,02 - GENERAL PURPOSE SILICON DIODES '0'\" 31500 pf I~O pI 10 mHThis two frequ ency crystal oscillator changes 2200 pI 910 pffrequency by simply reversing the supply v oltage. 80 kHz 1150 pI 6.2 mH 100 kill 1800 pI 200 kHI 390 pi 4,1 InH 4!5!5 kttr \"'0 ,I 1000 kltr T, •tee • .,~ asc ,I , \"' \"'\"0 O.'H IIIHWhen the supply voltage is changed, the transistor This simple circuit pro vides an extremely stableinverts itself; usually transistors may n ot be used BFO. The frequency of oscillation may be tailor-in the inverted mode, but in an oscillator a gain ed to your needs by simply choosing the properof only 1 or 2 is needed and this circuit provides tank componenents listed in the table.a novel and simple way of obtaining two frequen-cies from a single stage with a minimum of.\"switching. ., ,. ., 1~~F ,.. .\",\" ca ( T)jAOTO.2n5. \"Co-.LINPUT '- 6 .11k \"'- 7.5~ r: T .. rI7 06 ,Ik i~5 >\- rccx , \"fREQ ~~-4 00..f ., r-r '~ \" '\" \" +' r-o OOTPUT r\" 510k o. '\" '\" ..r 5.6 k \" ; ~.2 ,Although this capaci tance meter will n ot measure electrolytic capacitors, it will measure any othertype from zero to 0.1 J.1F with reasonable accuracy. On the lower and 4 pF can be read accuratelyand 2 pF easily estim ated. Transistors Ql and Q2 are 2N168, 2NldOS, 2N2926 , SK3011 orHEP-54 ; the meter is a 0-50 microampere unit and the range switch a Centralab PAI021.FEBRUARY 1974 101

••• -20. '\" 14 4 MC L + _ -<>+ I.' ...~ .0'- .TAL I II 21'1 114 1 This si gnal injec tor/tracer switches from th e 0' injection mo de to a signal tracer by simply plugging in a pair of high impedance magn etic earp ho nes. As a tracer it works from a u dio up to 432 MHz. Tr ansistor Q1 is a 2N1 70, 2N388A, 2N1605, SK3011 or GE-7; Q2 Is a 2N 188A, 2N404, 2N2953, SK3004 or HEP-253.LI B T\lRtOS EllUl 3003 116 T\JRtoIS PER INCM, lI2' OI A\"' ) -'\" ~ 0,,.,~~I'UT I rAPf>ED AT \" TUR1\IS FRO'\" COLD EItD,l2 8 TURNS..:I 16, ~1 6· lUM. l- LOMG \" !:X,1.3 3 TURNS 1«), 16 BlF ILAIl WOUND ON (;OL D [N O Of L2 . ~ ,'\" ~,~ O'UVTPUT Z01 2N38\", 5.3008,llnI03 \"~ '\" \"RFC r l.flt'\" !OHMll [ Z· I.... ' •This simple two meter transmitter may be used as a rdriver for a larger 144 MHz transrrtitter or a signalsource [or testing receivers, converters andantennas. »0 I r- This phase spli tting circuit provides two OU t of phase signals fo r driving a push pu ll am plifierA general-purpose r f detector p robe fo r use with an without an expensive transformer. Th e gain of th eo!rilJoscop e or voltem eter. stage as sho wn is 1SO, bu t this may be adjusted by changin g th e value of th e 22K feedback resist or. Ql and Q2 are a comp limentary pair such as th e 2N652 an d 2N388 or 2N2430 and 2N 2706.-\" on OO. 410 on '''' 1~ 0' '0.'.\"ZOOk ;; ,-: oo. M ,,,,. ..---,~.\".fy. - - - - ~ ~ - - - \o--j 0' 0' 0. oo• ,,,,. \"\" , ~ ~ ':,'(\"---0 f-o ,.. ~L ... '''' '0' 10 \".n 4.n r\" '\" r '\" ( A) ( B)Th is high im pedance preamplifier provides up to 20 megohm s input impedance and has a freque ncyresp onse from 10Hz to 220 kHz . Circuit B was developed fr om circuit A by replacing th e emitterresistor in A with Q3 and addin g an em itter follo wer to red uce loading. The input im pedance is fu r therincrease d by th e components shown by the dashed line. A ll transistors are 2N2188, S K3005, GE·9 orH EP- 2 .102 73 MAGA ZIN E

SAVE $80. SAVE $100. , ~- FM-27BSBE SB-I44 Purchase a C legg FM- 27B for the Regul ar price of $479.00 with No Tr ade and yo u ma yReg. $259.- NOW only $179. take a $100 cred it towards t he purchase of any other ne w merchandise o f yo ur cho ice.Top perform ing a-meter FM transceiver, c utreetures everything Follow ing a re some pos s ib le s uggestionsin its class-stands apart as tne exceptional do llar value i n of other me rc handise you might take :VHF/FM gea r for Ihe radio amateur. Beautifu lly ccnstructed-.compact and co nveniently installed, 58-144 ha' what il takes * Clegg AC Supp ly f or FM·27B $7 9. 9 5lor rock solid, \"through the repealer\" contacts. 12 separate * Cushcraft, Gam, Hy-Gain . Larsen Antennascrystal positions for both transmitter and receiver allow all· * Bird Ham-Nate 43 52 wattmeter $79.00repeater pair off or combo receeter/inter-mcene ope ration. *If you can't th ink of anything- Phone usThr. . . .'- 01 crystal. ar• •upplled w ith trecu en cre e most or write fo r our \"Cond en s ed I is t ing ofwidely used natio nally lor repeaters. Exira power 100- 10 .atta Amateu r Radi o Equ ipme n t \" .output at only 2.5A 'rom 12V ca r batt ery. \"Hoi\" double SAVE $40.conversion receiver teeruree FET t ront end for high sensitivity.lOw cross modulation. Panel meter shows re lative power outputor receive signal strength. Set Is all so lid state inc lud ing anFEr and three I-C's. Supplied with quality dynam ic rnte w/ccncordI plug.Freq, range: 144-148MHz. Antenna Impedance: 50 ohms C O-1 a lCh ennels: 12 Rae, senslllvll, : .Power output: 10 watts 0.5 p.V lor 20 db quieti ng.Eml.slon : F3 AF outpul : 1 watt.Mo:. devlallon: + 15kHz. h l e c 1 I ...l t y :\"oeL'system : Phase ::!: 12.5 kHz fa 6db. Flllef: Ceramic typeOsc. freq. renge: 6MHz bandOperetlng voltage/power: Transmit : 13.8V fri 1.9A approx. Crystals supplied:Recei ve : 13.SV @ 0.35A approx. 34-94 94.94 16-76Size: 6-11116~. 2-3 /S '\"H, 9-1116'\"0 . •I •Add $5 for shipping. Exira xl als $5 each.Closeout Special r DRAKE TR-22Reg. Sl6 - Reg. $219.-NOW only $179. Now Portable 6 c hannel. I watt, 2m F M Xcvr.only $12 With Nic ad s , Xt a ls for 34 /94 . 3 4 /76 & 9 4. Carrying case. Antenna . 12 & 120v cords . Add $2.00 Extra Xtals $5 e a. Add $5 for shipping. fo r s h ipp ing & hand ling SIX EZ ·W AYS TO PURCHASE I. CASHPenn wood 100E· 24H 24 hr. Clock (e bo ny c ase) 2. C.O .D. (2 0'; DEPOSIT) 3. MASTER CHA RGE 4. BAN K AMERIC ARD 5. AMERICAN EXP RESS 6. GECC REVOL VING CHARGE

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Semiconductor Supermart • MOTOROLA. RCA. FAIRCHILO • NATIONAL. HEP • PLESSEY POPULAR IC', CORES AND BEADSMC 1550 Motorola RF amp $1.80CA3020CA3020A RCA % Waud io , $ 3 .0 7 T 200·2 ,., $2.0 0CA3028ACA3OO1 RCA 1 audio $3.92 KW Balun kit o n ly $3.50MC 1306P $ 1.77 $ 1.0 0MC1350P RCA RF amp T 68 -2 3 co res $ 1.0 0MC1 357P $ 1.0 0MC1496 RCA. . . . . . . . . . . . . . . . .. $6.66 T 50·2 3 cores $ 1.0 0MFC9020 $ 1.0 0M FC4010 Motoro la % W audio $1. 10 TSO-6 3 coresMFC8040MC1303P High ga in R F amp!1 F amp .. $1.15 TSO·10 3 co res ,MC1304P FM If amp Quadrature det . 5 2.2 5 T44-10 3 co res Hard to f ind Sal. Mod $3.25 BEAD SPECIAL Motorola 2 ·Watt audio $ 2.50 Ferrite Beads 1 doz _ $ 1.00 Multi-purpose wide band amp $1 .25 Low noise preamp $1 .50 ~~~INTRODUCING~ DEVICES AT Dual Stereo preamp _.. $2.75 FM mu lt ip le xe r stereo demod $4.95 FETsMPF102 JFET , $.60 NEW LOW PRICESMPF 105/2N 5459 JFET ,$.96MPF 10 7/ 2N 5486 JFET V H F/UH F $1.26 L A3018 (Replaces CA3018 $1.60MP F12 1 Low-cost dual gate VHF RF .. $ .85 L A3046 (R epl aces CA3046 ) 1.60M FE3007 Dual -qat• . . . . . . . . . . . . . . . $1.9840673 Du al -qa t $1 .75 LS370 (Replaces L M370) 4.00 LS1496 (I mproved MC1496) 2.003N 140 Dual -gat e S 1.953N 141 Dual-gate $1 .85 LS30 28A (Replaces CA3028) 1.6 0 NEW FAIRCHILO ECL LP1000 (A new f un-tvpe devi ce 10 make HIGH SPEEO DIGITAL IC 'S LED f lashers, audio osc, timer etc.) 1.609258 Dual \" 0 \" FF toggles b ey o n d 160 MHZ LP2000 Microt ransmitter 16.00.. . . . . . . ........ . ........... $ 4 .659582 Mut tt -t unc no n ga te & amp lif ier $3. 15 THINKINGI~1mm,95H90 3 0 0 MH z decade counter $ 16.00A 95 H90 & 9582 makes a n excellent presc a le r •to extend lo w frequency cou nters to V H F - oruse two 9528s for a 160 MHz prescale r. R-4C SIGNETICS PHASE LOCK LOOP TR-4CNE56 1B Phase Lock Loop $ 4.75NE5628 Phase Lock Loop $ 4.75 T-4XCN51 11 A FMI l F Demodulator. $1.50NE566V Funct ion Generator $4.75NE567V Tone Decoder $ 4 .75 TR-22 Check us out TTL BARGAINS7400 $.28 NOW OPEN FOR LOCAL SHOPPING STOP BY ANO CHEW THE RAG740 1 $.30 1110 N. Scottsdale Road74 04 $.30 Hay den Plaza East74 10 . . .. . . . . .... . . • . ..• . . . . . .. .. .. $.30 Please a dd 35t fo r shi pp ing7420 ... .. ... .. .. . . . .• ..• . . ...••• • . $.30 Circuit Specialists7446 / 7447 . ... . . .. . .. . •.. .. .. .. . . .. $1 .50 Box 3047, Scottsdale, AZ 8 52577475 $1.00 FACTORYAUTHORIZED DISTRIBUTOR FOR7490 $1.00 Motoro la H EP - Circuit -Stick - Ptessey All device s are fi rst quality and are741 92 • .. . .. . . . . . . .. . . . . . . . . . . . .. . $2.00 fully guaranteed.NATIONAL CLOCK CHIP $12.50 Set of circuit boards t o build a digita l cl ock $5.00

V'OEO .. RECOROERS -r\" • RECORDER - BE L L & HOWE LL MOOEL 2965 AGe Aud,o & VH~.O RESO LUT ION S:lS I,..... HC R RESO LUTI ON JOO h.... (Records Only) AUDIO RESPO\"lSe 80 10.000 101 ,This is a portable system and comes with POWER AEQUIREM EN 1S !']V DC. 10 \"'.' \"rec o rd e r, came ra and c ha rger. Camera in- 8 .UTER IES 2'lG . ).·u Aod'w ll\"_ lnol ........OOdlc ludes built-in Microp hone and Zoom lens. C H A RG ER \"'_ 10!>905 ,<><:I\" do <1Rec ord ing time is 20 mi nutes o n 5\" ta pe. CAME RA:Recordin g is bot h video and audio . RESOLU TIO N 5~5 1 , ne' HOR . RESOLUT ION soo\"..... VE RT f RED 60 H, IEI AI HDR f RED 15. 150 H / l EI A I LIST: $1595 VID EO OUTPU T l a p P. 10; ohm, \"\"~\",\",,od \"\"1'0 IlU,JMI NA lIO N )()Iu . VIEWFINDE R 1 ',~ I '\" CRT .... .....,' ...'1 nLE NS 5 1 , oom F 2 SHI PPI NG WT 35 ' h\ OUR PRICE (NEW) $550.0RECHAR GEAB L E BATTER IE S N...... 10' Poru Pak 5 36.00 a\" \" EXPERIMENTER S DELIG H T - \" sed \"SI$ .-epa,,\"\"le. Physoc~IV ,n liSClCOLOR A DAPTERS - limitO<l number \"\"ailable. w ,ll work w'fh alma. t not beal 10 hell. b\"1 , e'1,,'''n9 ..,\"'\" wOlk, an v 81 .., k and While VTR to co nve rt 10 NTSC colo r. f6C\",d playb.>ck d0('5 nOl ,mpai r monochrome Problem' and plOb. ble c.\",\"\" listed wi lh elOCh \".... $450 ,00 ea. p~ mach,,,,\" ,NEW NAME BRAND VIDEO TAPES 1400 II ( 1 hr .l ..... y 'llUm,lv PARTS ....i1able a l nN' !I've_a\" p\"celi. th,OU41' ..... ....;tolable. \/,upp ,ng wl_1 1bs. S29 .00 NCh •SERVICE un ,ts C\"\" be ....\"\"\"\" bv any compelent vIdeO l..:hnoc.... as~' Sh'1Ndrn in Melrote P¥k . IIh....... 1200 II . ('I, h r,l S19.00 each QUANT ITY OISCOUNT on ord... 01 mo.-e than 10 mach'''''''CONDITIONS O F SALE' -'\" . -_-.DEALER INQUIRIES - ar. '\"\"'100 lor ••1. of new equ,pment.NEW EQUIPMENT sold new. a, is. _ ~_._ \" to\", \"\" ' I'A <.....-'''' 'a \"' .. Q'.....' \"'R ..,., .USED EQUIPMENT sold.os IS 'n good work'UQorde<. NO _\"an tv .....a \" \"_ .. , , ~ < _.... lJood _ \"\" _ \" - AGC , , ~--- AII ' - •• ' ..... c.u.. ...... \"',... ~I>oo-..... f ,\"'If\" ........ . - , : . . . : . . . . ; . - - - - - -All \"n,\"\"lvd\"C! P'IO' 10 \" \" p\"\",nl BEll & HOWEll Model 2966 Th is video reco rder wi ll record di rectly from a standard TV set o r a TV camera. It will play back oY~ your home TV set. Aud io may be dubbed onto th e tape. A 7\" reel (2400' ) will record 1 hr. No home VTR unit und er $1000 can match the qua lity and capab ilit ies of this uni t. SPECIFICATIONS MAINTAINANCE RE SOLUT ION : 5 25 h n!\". S...ndard T V Ot' CCTV 'IICOfdonll MANUAL $5.00 VIDEO ' Inpu t an d.Jol. tpu t: 1.0 V Pop. 15 o hms. unb_l\"\"ced. Gu.ate, tha n 3. 0 MHz I,,,q. ' '''Ponse. 300 lin\". plo... Hor . , ••o lu lio n AU 0 10 : Mi k\" 0' 10\"\" ,\"pu ts.. 60- 10 .000 Hz j,eq. ' -\"'9\" POWER AEOU IAMENTS: 110 V AC. 95 wans DIMENSIONS . 18 3/S\" W. \" 10 3/ 16 \" H. K 15 11116 D. WEIG HT, 601\"'. LI ST PRI CE (1 972) $995.00 OUR PR ICE NEW $450.00 USED $250.00COMMUNICATIONS UNLIMITEDAll equ ipment sold as is. 9519 MAIN STREET P.O. BOX 463NO CO Os . WHITMORE LAKE, MICHIGAN 48189Fo r catalog. send SASE. (313) 449-4367106 73 MAGAZ IN E

MITS Presents eNew908M riesHandheld Calculator•••8 Functions Mean a Handful of Features! MemoryMultiplication _~Division _ _--.: ---_Squaring Subtraction _ _ ,_...~. Reciprocals ,...- Percentages100% American MadeChain & Mixed Operations Special Readouts: Plus: ·Floating & - Entry Overflow Fixed Decimal -Negative Result ·Algebraic Logic -Result Overflow - Low Battery PRICES*$129.95 Assembled $6.95 -8 Dig it Readout $ 99.95 Kit Full 1 Year Warranty (Alway s the most significant digits) AC Adapter for 11 OVAC Operation -Bright Led DisplaySIZE: 5-3/4\" x 3-1/4 \" X 1-1 /2 \" Carrying Case ( Ieatherettel $5.95 r----------------------------i\"Prices subject to change without notice. I 0 En-::losed is a Check lor $ I I o r 0 Bal kAmer ica rd # I I or 0 Mas.er Charge # I I Cred it Card Expiratron Dale I Incl ude $5.00 for Postage and Ha ndling Imin InsttumentatiaD &:I 0 Kit 0 Assembled :TelemetrY Systems, 11K.: o Please Send Information on Entire MilS line. : NAME6328 Linn, N.E., Albuquerque, New Mexico 87108 I ADDRESS I I I CITY T_.1 1IITS/1J21llnll, N.E., AlbuqUtfllut . N\", ...... 111. 1IIIZH-7553 ----------------------------...5051265-1553 Telex Number 66D401 I STATE & ZIP Dept. 73·2 I 660401 ....

Wasblngton's Blrtbday Speelals? Call George about his incredibly low prices - GEORGE WON'T LIE!Thinking Deluxe? Clegg 27B Swan 700CX $569.95? Don't believe it!Standard SR-C14U $595.00? • Not on your cherry tree! Collins KWMZA $1493.00? Better call George No sir - CALL!ELECTRONICSFREQUENCV MODEL INPUT RANGE NOMINAL Po IMH,) • 1.1 1.1 144 PA2 -12B PAlO-4GB 74 \"40 PAlO-lOB PA2-70B 5-1 5 70 PA 10-140B 70 PA 21408 5-15 14 140 140 5·15 '4The Hamtronics Crystal Bank $4.95 ea.Now there is no chance of you ever having outdated crystals. Make a deposit in theHamtronics Crystal Bank today.All you need is your sales slip and a crystal - get another crystal - no questionsasked!The Hamtronics Exchange Program RAMTRONICSWe will exchange Bird wattmeter slugs (in good 4033 BROWNSVILLE RO.,condition) bought from Hamtronics (sales slip needed) TREVOSE, PA. 19047for arwother slug that you may need in the future - (215) 357·1400. (215) 757·5300no charge. except for shipping. Your wattmeter cannever be outdated!108 73 MAGAZINE

• Tbe BIRD' neY AESU FT1 01 B includes 160m - at no extra charge! • Get the BIRD from HAMTRONICS • Ant it rip in put only $649 We have a comple te stock of all Bird watt meters a nd slu gs o n hand . . . • Sidetone out pu t immed iate d elive ry . Order a new BIRD • VFO (w arning lite) on or off Ham-ma te wa ttmeter fo r o nly $ 79, but Y ES • Clarifier (wa rn ing litel on or off p lease specify if you wa nt t he 200 / 1000 wa tt m od el o r t he 200/200 0 watt m odel. VA u. No ise bla nke r o n insert card • 8 pole filter f or better rece pt io n TEMPOA ma l~u \", and M...il im~ \" I\"\"n '\" ......., und lh~ .. \" rld h.. ~ d; \"\"o~~.... d t h~ FTIOI '. 2M FM AMPS\" ·n.'ili,, and ....li.bilit v. Man.v of l h~ \"\" \",. n,lin~ .;~n.l. .v.;\" h~., a,p \" ,in , ,h,.,,,,,.1F'TIO L It'• • 11 h r. _A '\! . CVi. ~SR. R......iwT ...\"\"i'; vih 0,3 mi,·r\" Mlt. IO.lR10 noj... ro , in. 160 mrlr.. th,o \",\" 10 mr' ..... , Citi...,,', lUn d. WW V. 25 a..tI 100 ke• • lib'.'0,\". 5 kr d ...ifi, r (0. Dr' or mohil . \" 1\"',\"1;0 \". Th. bu ill -in \"oj... ftl an k.r . , \".ur... in·mol ;\" \" m\"bi l\"p\".k I\"\"rlMmanr' ..i,h minimum of \"\"i...., t jTnn,mi llrr \"uhHil ~ \"ndr. m\"o' . dv (\"(Indi'i\"\". i. ' ''I'''',b, P EP 260 \".•SSB. 80 ..·.u. AM. 180 n. f.\\'. I I; \' C . oppt. built· in. 12 V 1)(: fu...d 1\"\"\".o hl• . ..I.e r.hl• • all ac' lrv 1'1 ,,1'\" a.... furn i. h \" t. \t . \"' h i n ~ u\"i\" avai la hle tOT,FTIOIB, FrlOl p.tch. FPIO!. .pra krT F\'Hll \' FO, FL 2 100 linrae. s.... vnue l\"c.1dealre f\"e drm u and hr'''' h\" ..... WORK ALL REPEATERS with theIICOMIIC,Z301• 16 2+ channels, sim plex o r o ffs e t (60 0 kHz ) MODEL DRI VE POWER OUTPUT POWER PRICEfor repeaters• All m odula r construct ion 1002-3 5-25 watts 100 135 watts $220• Super hot MOSFET/h el ical coi l .4/lV recei ver 1002-3 6 1-2.5wans 120,130 watts $235. A V AI L ABLE NOW! ... only $447.50 5-12 watts 70-90 watts 802 1-2.5 watts 60-90 watts $180 8028 5-15 watts 35·55 watts 502 1·2 .5 watts 45-50 watts $195 5028 $105 $130 220 Amps also available BAMTRONICS A OIVISION OF TREVOSE ELECTRONI CS4033 BROWNSVILLE ROAO , TREVOSE , PA. 19047 PHONES : (215) 357·1400/(215) 757 ·5300. FEBRU AR Y 1974 109

The most popular threeband beam in the world! iJlD TH3Mk3INTERNATIONALLY RESPECTED for supen•or performanceSuperior const ruct io n an d perfo rmance make t he difference in Hy- Gain 's popular3-e lement Thun derbird .• Thunderbird 's \" Hy-Q\" t raps provide separate t raps fo r each ba nd. \" Hy· Q\" traps are electro nically t uned at th e fac tory to perfo rm better at any f requency in the b and- eith er p hone or CWoAnd you ca n t u ne t he antenna, using charts suppl ied in t he manu al , to substan t ially ou tp erfo rm any other anten nas made.• Thunderbird 's su p erio r co nst ruct ion inc lu d es a new, cast aluminum , tilt-head un iversal boom-to-mast b racket that accommodates masts from 1114 \" to 2Y2\". Allows easy ti ltin g for insta llation , mainte nance and tuning and p rovides mast feed-thru for beam stacking. Taper swaged , slotted t ubing on all elements allows easy ad ju stment and re- adjustment. Tap er swaged to pe rmit larger dia mete r t ubm g w here it c ounts! And less win d loadin g. Full circu mfere nce co m press ion clam ps are mech anicall y and electrica lly super io r to sett-ta ppmq metal sc rews .• Thunderbird's exclusive Beta Mat ch ac hieves balanced input , optimum match - ing on all 3 b ands and provides DC g rou nd to eli min ate precipitation static.• Up to 8 db gain• 25 db f ro nt to b ac k rati o• Power capab ili ty 1Kw AM , 2Kw PEP• SWR less than 2:1• Extra heavy gauge, machine formed , eleme nt to boo m brackets with plast ic sleeves u sed o nly for insulation . Bracket desig n allows fu ll mechanical support.Other tri~band beams to choose from : Model 388 $154.95• s-ereme nt Supe r Thund erbi rd TH6DXX Model 389 $189.95• a-eleme nt Th underbird Jr. TH3JR Model 221 $109.95• 2-ele me nt Th underb ird TH2Mk3 Model 390 $ 99.95AVAILABLE FROM AMATEUR DEALERS THR O UGHOUT THE WO RLDiI,n ELECTRONICS CORPORATION Dept. CB .8601 Northeast Hi g hw ay Six . Li ncoln . NE 68507402/464 -9151 Telex 48-6424Distributed in Canada by: LECTRON RADIO SALES. LTD. 211 Hunter Street West. Peterboroug h , Ontario11 0 73 MA GAZINE

FEBRUARY 1974 111

the most powerful antennas under the sun! The Best Vertical There IS! 80 through 10 meters iJln 18AVT/WBNew, from the inventors of wideband verticals.Pack some pun ch ! All the omnidirectional performance of Hy-Gain 'sfamous 14AVQlWB... plus 80 meter capability! Unrivaled performan ce .rugged extra heavy duty construction . and the price you want.. .all inone powerful package!• Automati c switching on all five bands through the use of three beefed-up Hy-Q traps .. . featuring extra large diameter coils for ex- ceptional LIC ratio and extremely high Q.• Recessed r oax connector furnished.• Top loading coil and four element static hat.• Constru cted of extra heavy wall high tensile aluminum.• Hot performance all the way across the band wttf just one setting (10 through 40).• Hy-Q traps effectively isolate antenna sections for full 1/4 wave resonance on all bands.• No dissimilar metals to cause noise.• SWR 2 :1 or less at band edges.• Maximum legal power with low frequency drift.• Exceedingly low radiation angle makes DX and long haul contacts a cinch ... whether roof or ground mounted.• Very low RF absorption from insulating materials.The 18AVT/WB is constructed of extra heavy duty,taper swaged. seamless aircraft aluminum with fullcircumference, corrosion resistant compressionclamps at all tubing joints. This antenna is so rigid.so rugged ... that its full 25' height may be mountedusing only a 12\" double grip mast bracket. ..no guywires, no extra support.. .the 18AVT/WB just standsup and dishes it out!Order No. 386 $79.95Get the strength . the performance and the price you want ...from theman who sells the complete line of quality Hy-Gain equipment.HY-GAIN ELECTRONICS CORPORATIONDept. CB 8601 Northeast Highway Six Lincoln . NE 68507402/464-9151 Telex 48-6424112 73 MAGAZINE

iJlnAll you need to know about 2632 meter mobile antennas! 264263 Special no-hole trun k lip mount. 3 db gain . 130- •174 MHz . 5/8 wave . 16 ' coa x. DC g r o u n d . Basematch ing coil for 52 ohm match . 17-7 ph stainless 265 723Nsteel wh ip.264 High efficiency, verticall y polarized omnidirec-tional roof top wh ip. 3 db gain. Base matching coilfor perfect 52 ohm match . DC ground. Coax and con-nector furnished.265 Special magnetic mount. 3 db gain . Performanceequal to permanent mounts. 12' coax and connector.Base matching coil for 52 ohm match. 17-7 ph sta in-less steel whip. DC ground .Rugged , continuously loaded , flexible VHF portableantennas. Completely insulated with vinyl coating.Bend at all angles without cracking or breaking . Can-not be accidentally shorted out.723N With UHF connector.269 With 5/16-32 base for Motorola HT; Johnson ;RCA Personalfone ; Federal Sign & Signal ; and cer-tain KAAR, Aerotron , Comco and Repco units.723A With BNC co nnecto r.260 Commercial duty, 1/4 wave, claw mount, rooftop whip . Precision tunable to any discrete frequency108-470 MHz.261 Same as above, with 18' coax and connector.262 Magnetic mount whip, 108-470 MHz. 52 ohmmatch. Complete with coax and connector. Write for details iI,n ELECTRONICS CORPORATION Dept ce . 860 1 No rt heast Highway Six. Lin co ln . NE 68507 402/464-91 51 Telex 48 -64 24Distnbuted In Ca nada by· LECTRON RADI O SALES. L TD. 2 11 Hunter Street West. Peterboro ugh . On tarioFEBRUAR Y 1974 113

The possibilities are virtually unlimited and the prices are unbelievable!!!!!!!!!! Start with the basics and pay as you go. Write or call for details . . . \"your inspiration is our motivation\"I 114 VHF ENGINEERING - DIV. of BROWNIAN ELECT. CORP.- 320 WATER ST. POB 1921 BINGHAMTON. NY 13902 607 -723-9574 73 MAGAZINE

LIKE OR Then you'lllove Data Engineering's new catalog Write for your free copy today!TOUCH TONE PADSMore features than any other pad including butlt-Inmonitor speaker and latest Phase-Loc k loop circuitry.TTP·l Standa rd pad for portable trans c e ive r mounting.TTp·2 Standard pad in attractive case for ho m e o r mobile use.TIP-3 Min i-pad in attractive case for home or mobile use.TTp·4 Mini·pad for portable t ra ns c e ive r mou nting.TIP.I, 2, 3 & 4, Sh. wt. 1 lb $44.50TTP.IK, 2K, 3K & 4 K, Sh. wt. 1 lb $34.50CRICKET 1A popu larly priced Ie keyer with more f ea t u r es fo ryour dol lar. Cricket 1 is a sma ll size, so l id s tate keyerdesigned for t he beginner as well as t he most ad·vanced o p e r a tor . It provides the u ser with I a t tg u e-t reesending and its clean, crisp CW allows for easy ccpv-i n g at a ll speeds. Turned o n its side, the Cricket canbe used as a straight key for manual keying. CRICKET 1 Sh. Wt. 3 Ibs. $49.952-METER PREAMPSpecially made for both OLD and NEW receivers. Thesmallest and most powerful preamp available. Pro-vides 20 d S ga in at 2 .5 N .F. to bring in t he weakestsigna ls. Sh. wt. 4 0%. $9.50 kit $12.50 wiredPlease include sufficient postage f or shi pping.DATA ENGINEERING INC. Ravenswood Industrial Park, Springfield, Va. 22151 5554 Port Royal Road • 703·321·7171FEBRUARY 1974 115

Here is a SPECIA L DEAL for 6 and 10 meter fans • • •I , RCA model CMFT-50 Covers 25 to 54 M without coil ch angeHsz! ~t.--:-~Y\"~'~;t5r0anwsiastttosroizuetdpuret~evl:v'.lethr. tSratnansidsbtor po~er supply anRegularly $125.00 y drain is onl y 2 .2 admppasr.tly- th is month only $100.00, wi.t h accesso ries.We stili Thhaevseeaarfeewfo3r0uwsea'Itnt TthPeLtswIeoftmfeotreronblaynd$1• 55.00..IrneTcpElrueRdsMeenSatn:etdeAnllnaI.tsem0'scsryolsdtaalss. iIsi Accessories do n o t DPuOPaBge FM , Inc.01 receipt ' retu. r n I0' exchan eq ujp. rneenntt iIS no ' as 1o • OX~~'PPl ng d~YSresidents add sales taxC.ha,ge,ge pwreitphaiind. fivIeII'InOI.S 3L1o2mbard , III. 60148 -627-3540

TOMORRO '5 RIG•• •tlvtliJtlbJe DAY! tChe e,,&itinll aJJ new INOUE IC.,2:JO!TAKE A SLICE OUT OF THE FUTURE . . .· .. and put 67+ CHANNELS* of 2-meter FM pleasure in the palms ofyour hands ... with the SUPER COMPACT (2.3\" x 6.'\" x 9.7\") IC-230.Feature-w ise . .. th e IC-230 is fu lly synthesized (with the new excl usive \" PhaseLock Loop System\") .. . all modular construction (servicing is a snap-in and out)· . . a rece ive r t hat is very sensitive and se lect ive as t o wha t it hears (better t ha nOA UV / 20dbl . with uniq ue Ino ue he lica l fi lters to e li minate int ermod· . . plus a su pe r E filter mo sfet front end , maki ng copy a pleasure . * And not a crysta l to buy w ith th e exclusive \" Phase Lock Lo op System \", (That' s close to $650.00 worth of x tals!) GRAB HOLD OF THE IC-230 A T YOUR LOCA L DEA L ER TODA Y -tt IIICOM !Distributed br.Y',,-:::::-:::=-==-=::- ICOM WEST. INC. ADIRONDACK ICOM EAST - Dealerships Available - RADIO SUPPLY SUit e 2 32 - B ldg. II Oiv ACS , Inc . 185 West Main Street BOll: 331 300 · 120th Ave. N.E . Am st erdam , N.Y. 12010 Richardson, 'rex . 75080 (214) 235-0 479 Bellevue, Wash. 9 8 00 5 (20S1 454-2470FEBRUARY 1974 117

Do you have the latest parts information from SOLID STATE SYSTEMS, INC.? Those of you who do not have our latest catalog really ought to send for it. You'll be surprised and impressed at the new items we have added. For example: \"tr A COMPLETE LINE OF 5% RCR TYPE RESISTO RS \"tr A WIOER RANGE OF ELECTROLYTIC CAPACITORS \"trSEVERAL ITEMS OF IC INTERFACE HAROWARE \"trONE CHIP CALCULATOR ANO CLOCK CHIP \"trA TO D AND D TO A CONVERTERS \"tr A WIOE VARIETY OF PUSH BUTTON SWITCHES These, added to our already full range of digital and linear IC's, 10% resistors, ceramic disc capacitors, dual-in-line IC sockets, LED and incandescent displays, diodes, and other items, make us a very complete supplier. Why not write or phone our order desk today for your free copy of our Winter 1973 catalog and see for yourself? 800-325-2595 and 800-325·2981 (Toll Freel WRITE: P. O. BOX 773 COLUMBIA, MISSOURI 6520111 8 73 M A GA ZI NE

INTERNATIONAL ELECTRONICS UNLIMITED...--••• , ••••0 .- ...••• .., \"\"\",..'''''..ll0.l'l.' ,.••.•••,'- •\" .-••• ••, -........., .- ..~ •••\"\" .. ,...\"\"\"I,.''''!0U\".>.0.I. - _-_no.-••• •••••••••••\"\"••\"U0••••• ..-- ...••• ••\" •,•. -_\"'Y_._-\"\"_~ .•••.-,\".\"'0 .,\",\"\"..',,''\"\".\".. •,•. ,-- -_.,.----\"-l....' ,~ ,US ....\" • 0-0 _ _ ........ _ ' .00 .. MM5313 CLOCK CHI P\"J.\"\" 'luU.I ,•••••••• .',,,W...\",0O\"'\"O.' ••••••••••••••••,, --~ ' .:l!i ... ,-'\"--ZI _ WITH LED's,\" .\"I f .,\".,\". . .. ..,\"I.\"\"'.I1I,l 1 Iii .. ..._ _ .. JOv _ .. • ........ u O'•. \"1011 ...--• ..,,.\" _\", .\"D'I.''- ......... _ _ _ _ •••••••••• ••• • ••• 1l1.1oOI. ..\"\" J] H, _ , , _. .'OIl • ... 2.... ........._... .---, ........ T__ _141. .'.•-••••,, _. - --_...v,.\".''_\"' _ ''''\"'' 0,\" '(1(1'\" \" I ,W FLAT PACK GRAB BAG.. ..\"'0331' ..'-- .\",..'0o0r; 'O.Og\"..\". \"1:1,.W ••••••1•.•••••1•••0 ..•. '..,,\",,,\"\"....'1,,,\"''1,,nn,0,. ' 0. \" . . . . 11.•....-.- ,.,,,, '0 •••• ••,1.11 '\"'01 ••' 0119 ,_\"., ..\"0' _ _ .. ~1l .....A .II.. ~_nl ......_ n L \" '-02 I U S ,.,~~... \"•. • •.0• ••.,' 0'11I -~ •••\"'\"o.l1OU1!,' '0.-\"In'O\" .------ ---_--•,.. ---- .-_. -.. .-_- --• NEW ITEM..·........ •••.•J',D;l _ ,: _...\"0.c o -~ .~ ' Ol n ••' oll.. ----..,..--_-.\" n ,..'_\"\"\"'. . ..••'\"'03 \" •• -~ .~ •\" V3 ~' 0'00 ••,\"\"lO,,,' on •••••••• ~ ,••' ••• ~ ~. ~ •~ 00 ... _ _ -~ ~. .'.•\"\"0 ••.>.~\" UO .~.••__\" U O \"l..----_..,.. . ..-..... .'.... .--.-.,. ...,••••••, A l l O O P \" \" G$. _ U,.'H_'_ _ I__ ICNO• • ~_' __ _ ._ .\"W .. _ICO __. _-----_ _.......\" ___\"GD.. ••• _ __._u._~_, . g.. .. _._ _-_ U.. ,IO_'.._.... _.-'\"_oro __.,.;;:;,~,. .0....._11_ _ . _0olo _--.......,...... ••• • •.~\"'-IlI' ....\" ... _'.l'll • .D. o_Io_-·_-- _._.._.- .\" .....,U' '10_'_,_....,_. _ U • • ,.. _ ' .lO~' .\" \" •,,- v_.,_.. v._~_. o• •. ....,_ _,-......_ ..,__ n . ......-- ._,._'n. ....,.,y_ ~..,.. To -l .. _ .. • .• • \"'~ I -o l' ,, ~ ' .00 .. , .~ roo Do.t...._...... l SI So __ '\" r•• ••\"\"\"'-,_.'\" 1lI1 r,..o0,.~•\"' •-o,... a ,w\" .-..., ..__-__--_-- _.. . ...' 1001 _ .....,_ 1.~. . _ U' lll_,... _ t ___ , \"',-- __..._._-\"\"- .....\"\" ,~- ...~' ·D.. ,. ..A .2O. ••• .~ •••\"\" ...... ... .\"\" •••l~M :-no '.ft. ~\"\"\"-- .. \"0.• 1.. ..~. , .~ . IV. _ ••,,,--...---... ---,_.__.-_--...-.-... - .>......... ......... .0.... ••••••.....~~~~---\"0.0.... ..~.-o••• 0olo _ \" '\" . • . _ ...... • 011 .....~ ...... y _ e . - . .... rob '~\"'-- - roO , ~ .~ ro_- _..~ - ..\" -.... .-.-...--...-.. .W.\" ' __'011 ----_,,----'-_--_---_---_-_------'---- --..\"..--..... ... _. _ _ \" . . - _ ...... IflI C.A. OA . • •--~~~ No ..--_- - •••~ ~-- ~. - .. .. 1/11.00 ~ •>•.,-..-.. ---\"-'- --- _>..... .0.......... •• ••~~~~--- _.- •••• ....... _ ' .!lO .. ' • •.1 • • I•I••I' .••• ~--- _ l .....\" ....... _ ' . _ ,,~ ,...... _ _... c\"- -- -.-_',- ...................11 ~- 101 .. _ -......._, -__.-. .- _.... -\"\".....~ _,\"\"\"_ mo. ...., ....... a ...n II\" II\" :!VI on__-.-..._.__-\"\"\".'-- -...~~--- _... . _.~ -, -\"\"-\"--- ofl.\" • •o. ~. - •••• .......... ..... 0 .. .....,-OW. _... ,-\" \".- - ~,__.-.-._ ,-... ... ._ ' . .-TO0'.I'_,.\"0.1\"..\".........'.....'.·.0.\". '\"'.'.'_.0..'..'....... ON ORDERS OVER $25.00 DEDUCT 10% _ '' ' Sat isfac t io n guaranteed. All items except as noted are fully tested . ..... Minimum o rder $5.00 prepaid in U.S. and Canada. Ca lif. residents add sales ta x. Orders filled within three days from receipt ..,- ._.DOl' ~ _. ._..OW' INTERNATIONAL ELECTRONICS UNLIMITED P.O. BOX 1708R.....,..-. _..-......,,--, ...O,.W..' ................. ,, Monterey. Calif. 93940 ...... . . . . . . . . . . . D1~ \"\"T O' . ~ ..... ..-...... .-_'..,...... _\"\"To-I , _T _ _, 0.FEBRU AR Y 1974 119

LEO READOUTS OPCOA S lA-l Sim ila r t o MA N-l ..33\" h igh. 20 m A per segme nt . With deci malpoint. Every one chec ked - all segme n ts ope rating. Red - $2.65 each , 6/$15 .00 Green - $3.50 .7 inch readouts .. . $5.55 eachCLOCK I.C., Nat ional MM5314, fo r 12 or 24 hou rs, 50 or 6 0 Hz, 4 or 6 dig its . Only $ 1 1 .9 5 eachLED - molded plast ic d ome sha p e wit h leads. .31 2 inc hes in diameter . Red - $ .35 each, 3/$1.00 Green - $ .50 each , 6 /$1.00KODAK REO Wratten Filters Perfec t fo r light filter over red LEOs. 4 \" sq., .005 \" thick . $ .35 each. 3/$1.00lM 309 Voltage Regulator IC. 5 volts at 1 Am p . ma x. current. 52.00 eachPRINTED CIRCUIT BOARD 2 oz. co pper o n glass epoxy base, ep prox . 5\" x 6 \" . Your ch oice cop pero n o ne or bot h sides. 3/$1 .25ETCHANT FOR P.C. BOARDS Ammo niu m persulfate, 1 lb. of crystal s, just dissol ve in H20 . 5 1.25IN 914 DIODES $.10 each , $1 .00 a dozenPLUG·INS for Tektroni x scopes: 540.00 each. Typ e A, Wide-band; 0 , High-gain DC differential, 1mv.lcm. ( Hickok); E, High -gain AC Different ial ; G, Wide -band Differential; K, Fast-rise ; Type P,Fast -rise Mercury pulser test un it $ 25 .00HUGHES WS -4 Preampl ifier Plug-in $25.00PLUG-INS for H·P 524 Counters. 526·A Video Am plifier, $40.00; 526-B Time Interval Unit . $25.00FILAMENT TRANSFORMER, 6 .3 v , ct. @25am ps., 115 /230 v. 60 Hz pti . Herm sealed. Shpg. wt .141 00. $4.00 each ,4/$ 14.00SILICON RECTIFIER International Ree l. R - 21 0 -F, epoxy , 100 0 PIV, 2 amps . 5.4 0 each , 10/$ 3 .5OMatrix Plug·Soard. Wired in 25 h orizontal & 24 ve rt ica l rows .By inse rti ng ju mper p lugs, any hor, row ca n be co nnected toany vert . row. Co nst ruc ted of Elc o \"Va ricc ns.\" Can be --., --disassem bled or rewired for o ther app lica tions. Great for - I _•_breadboard ing, switc hing, p rogramming , I.C. test ing. Dime n- - I .. _sio ns : 8 %\" x 16%\" . Shpg . wt. Sibs. Used , exc. cond owi th 30sho rt in g plu gs. Only $10.00Matri x Board wit h 2 5 x 12 rows. (Hal f of above boa rd.] With15 plu gs. $5.50Teletype Model 28 Tape Equipment. Tape reader LBXD &Perf ora t or BRP E o n LR XB9 Base, m ounted o n LTH S Tap eHan dling Unit . Reader is 60-75- 100 vvpm. Perforator ishigh -speed (600 \/vpm ). Exc . Co nd. , as rem oved fro m service.Shpg. wt. '00 lbs. $75.00 eachH·P 5221 -A Digital Counter , So lid-Sta te, 10 rv'\ Hz. Like new. $ 150.00Empire Devices (Si nged NF-l0 5 Receiver with T- 2, T-3 , T-A Tuners, Exc . Co nd o $ 180 0 .0 0Stoddart NM-20B Radio Inter ference & Field Intensity Rece iver , with po wer supply , lo op antennas,cabl es. Exc . Co ndo $385.00P.C. Board Edge Sockets. Am ph enol. 3116\" contact sp acing. 6-eo ntacts,- wit h solder term inals . 25t!15-eontac ts, w it h wire-wrap terminals, used, exc . 25e ea. 5 for $1.00TTL ICs 7473 .. .. .......... .. ... . . •..... •557400 $ .3 0 7474 ..... ......... . ..... • ..... •.557 4 02 • ..• . . . . . . . .. . . . . .. .. . . . . . ..30 7 4 7 5 . . . . . . . . .. •.. ... .. . . .. .. . . . •857404 ... ... . . . . . . . . . . . . . . • . . . . . . .35 7476 .. . .. ... •..... .. .. ..... •... .607408 .. . .. . .... ... .... ... •. .. . ...3 0 7490 1 .00744 1 •. . ... . . ..... .. .. . . .. . . . . . 1.75 74121 . • . .... . . .. .... .. .. ...... ..6 0744 7 .. ........ •.. ... ... . .. . . . . 1 .6 0 74 192 .. .. •.. .. .. . . .. . .. . . . . . • . 1.907448 ..•... .... . .. . .. . .. .. • . . . . 1.6 5 7 4 1 op amp • . .• . . •• • . . •• • . . . • . . • • •55MINIMUM MAil ORDER $2.00 - Please add shipping charges • Mastercharge • - IS 1916 Clark Avenue Cleveland, Ohio 44109120 73 MAGAZIN E

T::~'CALCULATOR'.'::::RD\"lT ,.•• • ,Attra cti vel y ded gnedl Exc e llen t c ra f tsman-ship. Cas e and keyboard (des i gned 88 Oneunit). Cabi ne t 18 ma de of high- impac tplastic be ige co lo r with black be zel KR8l0 Rec t . 50Y 1A .10and amber wind ow . Ke yboard co nBia uof 8 ) -poa l t lo n a l i da . wi tch and 2S Special 8II: Hex Inverterke ys, S o f whi ch a re used fo r me-- TTL DIP Hex I nverter; pio interc hangeabl eo ry f unc t ion . 20 key. gray, 5 keys wit h S:- 74 0L0. Psrt s . r e brand new and s reora nge . Al l ke y• .enlnced on Do e r - - - - - - -- - - - - - --1 branded Signe t ic s snd lUr ked \" 811.\"print ed c i rcu i t board . Thh -odu-lar unit 1. wall sui t ed for ou r LED's 2 : ~~ ~lEACH •• . ••. . $cs leub en ... ch i ps . I d eal f or t heCT5005 . Case a nd Keyboa rd Ca.ple te: 10 FOR• ••.. 100 FOR •••• 23 .00 ~ .Q!!1! $29.95 1000 FOR••• 220 . 00RCA NUMITRON ' M A N 3 MG- 9 plus 2EACH • •••• • ••• •• • $ 5.00 $ . 75 lette rs . 10 FOR 6 .50 Right-hand deci ..l point .SPECIAL: 5 FOR $20.00 ITi:J1iirI Flat- p. ck t ype case. Long EACH 52 .50 ope ra t ing llf. . I C vol - t age requ i r_au. t des l 1 0 DR MORI: 1 .90 f or pocket calcul a tors! WIO DEC DlAL 1 . 503- CHIP CA LCULATO R MA N4 Seven-segmen t . G-9 pl u s let-This ca lcu la- t e rs . Ri ght- ha nd de c 1lllal po i n t . Sna ps int or aet pro- S P EC IAL 874 !4- pin DIP soc ke t or Molex. I C voltsge re- quir_n ts . Id eal f or d e s k o r pocket calcu-vides a U o f 25 6- BI T ~~ ACCESS KEHORY l atorsl \"\"a a aathe ele ctronic. IL en IITTL bi-polar f ully-de c oded 256 x \"'R.. .. ... ' ,\",5f or 8n 8-d igl t , TEN OR KORE. 2 .50 EACHfl oati ng point calculato r wit h l e ft - ~-;:;;\"\"-C;.~;~~:...:~~~~~~~~~~1 bi t :ha lld entry . Ke ybc.rd. display , cloc k v' ~vvgeuer at cr , and dhplay driver is an _Si ngl e 5V su pply CD-2 Counter Kit s 8 0 lO S acces s t illethat need be add ed t o . .lte a c. lcu l~ ­t or th.t will .dd , .ubt r.c t , .ul t i ply _Simp l e memory exps osio n t h ru Thi a kit provide s II h ighly soph is t ica t e d. nd d i v ide . Ove r flow .nd nega t iv e ) - chip se l ec t line s d iap l ay .ec t ion DOdd l e f or c loc ks . coun t e r l .signa ls a re .lso p r ovid ed . COllpl e te o r ,o t he r nume r ica l d is pl. y needs. The un i tinstructions t o bui l d a ca lculator D.t. with c hip . 16-Pio DIP . i s . 8\" wid e a nd 4 3/8\" long. A li ngl e 5-voltincluded . $5 .00 10 FOR $39 . 9 5 powe r aou rce powe n bo th t h e tC s .Dd the display t ube . It can a t tai o typical count CH I PS AND DATA• ..•..•.. . . . S8 . 95 3-Amp Power Silicon Rectifiers rste s o f lip t o 30 MHz a nd s lso ha s s lazllp t e at . caus i ng a l l 7 s e gme n ts t o light . Kit DATA ONLY ( Re f und .ble ) • ••• 1. 00CT5005 CALCU LATO R Marked Epoxy Axial Package includ u a 2-sided (with plsted t hru ho l e s ) fibergl as l printed c i rcuit boa r d . s 1490 , sThia ca lcul a tor chip has a f ull four- PRY PRICE PRY PRIC E 1475 , II 7447 , a DR 20 10 RCA Numitr on displsyfunction lIemory . whi ch i s con t ro l l ed 100 .. . . . $ .10 800 ..... $ . 30 t u be . comp l e t e inst ru ctions. and enoughby f our keys. !tt (add s entry i nto 200•..•.. 15 1000 ...••40 Molel< pins f or the t Cs . . NOTE: boards canmelllOry). .:!!. (s ub t r ac ts ent ry fro\", 400 18 1200 50 be su ppli ed in II si ng l e panel of up to 10memory). CM (c lear mellory . wit hout ( rea d r1 _\"':6=00=..=...=\"'.2:~3 \"\"1::5:0:0=..\".'.:-:.\"6::5:\"---1 digit s (with a l l interconnects); therefore.CMOSRMclearing rest of r e gisters ) , when Qr d e rin g , please specify whether youe ee cry or us. as entry). - want th<'1l1 in single psnels or in one multi-l2-D igit d isplay and calcu- CD4001 s . 75 C04023 s .7 5 0 i; ./. :ple digit board. Not spec ifying will result Iste in shipping delsy. ~Fixed decilllal a t 0 , 1 , 2. CD 4002 .75 74COO . 75 74C20 .75 COMPLIITE KIT , 3.4 , or5 CD4010 1.00Lesding zero s uppress ion 74C16 0 3 . 25 FlJtO~NiLY~A~$1~1~.~9~5ED \.·.J~7'~~.,;'~-, ,,t~,, \"1-5egmeot multipl ex ed ou t pu t CD4011 .75 C04012 .75True c r ed i t sign d isplay DIP Board l c a n be supplied separate ly @ $2. 00Single 28-pio ch i p $ . 30 f-p\"e::r...d::i:g::i:t:. .:...------ - - - --CHtP AND DATA ON LY $9 . 95 74L51 74H5lDATA ONLY (Refund.b le ) • . . ... . 1. 00 7453 .J> 745 45001 CA LCU LATO R 14L54 .20 LINEARS 74 L5540-Pio c . l c u lato r ch i p will edd , au b- 74 60 .2$ NE540 7G-wa t t power d r i v e r IImp ••••..•• $2 .00 74LHtr.ct . lIultiply , . nd d i v ide . 12-Digit 74 72 . J> NE555 pre c ision timer .. .••.••• • ••..•.• 1.50 14 L72display .nd calcul. te . Ch. in c a lc u la - 74 73 . J> NE560 phas e l ock. loop DIP 3 . 25 7loL73tions . True credit balance s ign ou t - 7474 .20 N£ 561 phaa e l ock l oop DI P .• • ••.•..• .•. 3.25 74 L7 4put . Au t omatic over- f low i ndic .tion. .\".30 NE56 5 ph.le l oc k loop TO-5 ••••.••.•• . . 3.25Fixed dec i ...l point a t I , 2 , 3. or 4 . NE566 f unction ge ne ra to r TO-5 •••••.. . . 4.00Leading zero supp ress ion . eomple te . 50 NE 567 t one decode r 4.00dsta auppl ied with ch i p. CH I P ~~ DATA• • • • . • •• ONLy $9 . 95 .60 NE5558 dus l 14 1 op a ap KINI DI P .... . . • • 1.00 DATA OstY (Re fund.ble) • • •• 1. 00 .75 109 popula r op ....p DIP ... . . . ....•• .. . 4 5 . 65 110 voltsge coapa ra to r DIP . . .. •••.•. . 1 5 . 80 111 du. l comp. r a to r DIP .... . . • • . • • • • • 40All I C• •r e e ev .od f ull y-te sted; 74H14 . 80 12 3 pr e c ision voltage re gubt or DIP . 1. 00l eads . re plated with gold o r solder . 7475 1. 40 14 1 o p allp TO-5/K I NI DIP . •••• ••. •••• .55 74 76Orde rs f o r $5 o r _ re will be s h ip ped 74 L18 .60 747 d.,. 1 74 1 op amp DI P . • • • • ••••••• • 1. 00 7480 .80prepaid . Add 35e fo r haDd U ng and 7483 748 op lUIp TO- 5 1.00 7489 . 65post. ge f or _ l le r o rde rs ; r e sid eots 74 90 CA3018 2 i . ol.ted transi ator s and II D. r - 74 91 1.00of caUfornis .dd sales tax . IC or - 74 92 4 . 00 lingt on-connect e d trsnsistor pai r 1. 00 74 93 1.20der s . re sh ip ped wit hin 2 wor kd .ys- - 749 4 1. 00 CAl045 5 NPN tr.nsistor a r r . y • . . . . . . . . • 1. 00kit s . re .hi p ped wit hin 10 d.ys o f 74 95 . 90 CA102 6 dual differe nti.l amp . . . . . •.•••. 1.00 74 L95receipt o f o rd er. $10.00 lIiniDua o n 74121 1.15 LHl oo po. i t i ve DC regulator TO- 5 . • • .•. 1 . 00 741 23 LISC.O. D.s ( phone in) . 74154 LHl0 5 volt a ge r e gulato r . . . ..••• . . . . . . • 1. 25 74 1 61 1.15KAI L ORDERS: 14163 2. 00 LM102 op .s\"aPp .v.o. .lt...g.e. .f.o.l.l.o.w.e.r. .To-5 . . • • 1.25 14193 ut30 1 op . 50P . O. !lox J 48 11 Kyr t le Ave . 74195 1. 25 1. 50 ut30 8 op sap TO- 5 2. 00ca I\"llic hael, CA Sacr_en to . CA 2.30 2 . 00 U Ull comp. r a tor TO- 5 • . • . . • • • . • • • • • • • • 1. 759560 8 (9 16) 334-21 61 2 .00 1. 50 u n 1 0 AGe lUIplifier ••.. • • • •••••••••• • • 2 .00~E! !~K_GfJ..~~E..:..O! !.Lf. £OOD! ~ 1. 00 LH1 0 3 RF-IF amp epoxy TO-5... . • • • •••• • . 4 5SEND FOR FREE FLYER LISTING l00's OFHONEY·SAVING BARGAINS~ LKJ09K 5V- l A power supp ly module TO- 3 •• 2 .00 ut390D quad op .Illp 2 .00BRBYLOnl ut1 59 5 4-quad r a nt . u l t i p l i e r • .• .•••.. . . 2 .00ELECTROnlC:~ 8038 sine squar e tri.ngle function gener.tor .. . . . • . . ..... . . . • • .. 4 .95FEB RU A R Y 19 74 12 1

It's High Time ... . .. Amateurs had access to a good, up-to-date used gear list. For too long now, most used gear lists have been made up no more than once a month. Because used equipment stocks change daily,most distributors \"pad\" their lists with prices of items which maynot be in stock, but which do come through fairly often. This isnot intended to mislead the customer, but does often result inorders which can't be filled. These lists are actually lists of \"whatit will cost you, if we happen to have it when you order\".NOW - we have put in a new Hewlett-Packard data processingsystem, which will cure all of this.When you write us for a used gear list, you will receive a list whichis current - as of the previous day's close of business!Of course this means our list won't be as big as others, because itwon't be \" padded \" . Also, items listed will be subject to prior sale,but you can be sure that we do have it the day we mail your list,so don't be disappointed the next time you want to buy a useditem ... Write for Our Used Gear List First!Write our Ft. Worth store today for your list.ED JUGE ELECTRONICS, INC.3850S. FREEWAY 11181 HARRY HINES BLVD. DALLAS, TEX 75229H. WORTH, TEX 76110 Closed Sun. & Mon.122 73 MAGAZ INE

Bill GOOBOUT ELECTRONICS BOX 2673, OAKLAND AIRPORT, CA 94614 lED 7 segment similar to Dl 704 pins same as MAN 4,.3 char. . .. . . ... . . . .. .. .. . . . ...... .. .... ......... .. .. . ..$2.75 ea 10/$22.507 SEGMENT asse mbly 3 in 1 dip pac sim to MAN 33. Ideal for ca lcu lators. Sdigits and mi nu s sign $7.9511 digits and minu s sign $10.507 SEGMENT read outs 2 in 1 pac plus space. Ideal for clo cks. 6 digits for $5.95CLOCKS ship ped with prints #5314 $9.50#5316 alarm cloc k $13 .50CALCULATORS shipped with prints 5001 basi c 4 functi on $6.955002 4 fun ction/l ow power drain $7.9550054 function w/memory register : $9.95low no ise dual FETs. Ideal for stere o preamp si m to 2N5454 2/1.00RF FETS sim to 2N4416 21 1.00RF dual FETS $1.002N2907 5/$1.002N2222 ',' 5/$1 .00Bipolar memory lx256 Bit 74200 $9.501000 Assorted Resistors, Capacitors, Diodes in cludin g ove r 100 TTLDTL & Linear ICs on PC boards (i ncl ude postage fo r 4 Ibs.1 10.0012V BA REGULATED power supply parts kit. Ideal for powe ringFM rigs. Everything except the chassis .. . (include postage fo r S ibs.) 12.95ICs, m ost TTL & LINEAR in stock - Send Stamp for FREE CatalogCMOS DIGITAL L INEA R74COO .60 74C 195 3. 15 lM370 1.25 Feb. special for 73 readers only 555 t imers , $.85.74C02 .60 5558 100 lM371 1.25 R@pl\"\"\", HEP590 4 194 adjustable du al C04001 .60 trackin g regs. DIP $2.0074C04 85 C04002 60 LM372 US C04009 1.00 Buy 10 IC' s - 10% disco unt74Cl0 .60 C04010 1.00 lM374 2.00 Buy 100 Ie 's - 20% di scount C0401 T 60 All IC's t ested a nd guara nteed74C20 .60 C040 12 60 lM382 1 75 C040 13 1.2574C73 1.65 C040 16 1.25 741 T .45 C04019 1.4574C74 1.25 74 I M ini .45 HI/3 .95 C04023 .6074C76 1.75 C04025 50 CA30:l8 .75 C04035 3.1074C107 1.7& CA3065 .7574C151 3.30 CA3Ol.l6 .4574C160 3.2514C161 3.2574C162 32514C1 63 3.25LINEAR VOLTAGE REGSLM 309K 5V 1A REG 2.00LM 320K NEG Reg available in 5V 12V & 15VLM 340K POS Reg availab le in 6V 12V & 15V 2.25LM 723 Adju stable precision reg 2.25556 DUAL TIMERS 1.00TRANSISTOR GRAB BAG mixed NPN PNP 100 for • 1.60 2.95All ITEMS IN STOCK and will be shipped with in 24 working hours of receipt of order!Include 50/ postage and handling on orders under $10.00, all others postpaid. Sorry, NO C.O.D. 'soCALIFORNIA RESIDENTS ADD sales tax.FEBRU AR Y 1974 123

2048 BIT MOS MEMORY MaS LSI random access memory #N EC 6003. All inputs except clock are TTL compatible. 2048 word by 1 bit. 22 pin ceramic DIP. With specs. $9.00 each, 2/$17.00 CALCULATOR KEYBOAROS VOLTAGE CONTROLLEO OSCILLATORBrand new keyboards for hand held calculators. Rare item. See Pop. Elect. Mag. Oct. 1973 for uses.Two styles available. One for CAL TEX In 14 pin DIP package.5001-5002-5012 or MOSTE K 5010-5012. An- #B038C $9.95 each, 2/$18.00other for use with GEN INSTR C500. $8.00 each, 2/$15.00CT 5005 CALCULATOR ON A CHIPSingle MOS chip with all logic required for 12 digit4 function desk top calculator with extra storageregister for memory or constant. Multiplexed 7segment outputs for LED. Incandescent, Fluor-escent or Gas Discharge displays. Brand new andbargain priced. With Specs. $8.00 each, 2/$15.00 ASCII KEYBOAROS W/ENCOOER HP LEO OISPLAYS From Raytheon, new or like new. 5 extra function buttons each side. Open faced, no cabinet.Brand new Schematic provided. Price is postpaid world wide .4-on ·strip LEDdisplay . End butt $46.00two strips and comeup with 8 digitreadout. An this one a clock readout. nr r .. . t I fll t rr:-.,.;;unheard of SUPER space ... 2 digits. Perfect 1r''r2'''1t rr t r.t t tVALLIE at $8.00 1111 III II IIper strip of 4 digits.Two strips 18 digitsl$15.00. Another stripThe strip has 2 digitsfor readiRg hours & minutes. I I I I I I J I I· I I I S8.00 per strip. 2/$15.00 I I I I I I I I I I I 111 I. JJ U I I I II 11111 , CMOS 4814 HEX INVERTER • ••DIP with operation 3-18 Volts. Dual diodeprotection against static charge destruction.Dielectrically isolated complimentary MOS. 7400 SERIES IC, $1.00 each, 12/$10.00_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _- ; Talk about bargains ... this is a whopper. Due to quantity on meno, we are reducing this item to a DUAL 16 BIT MEMORY new MESHNA MESHU GINA deal. About 1001---Serial MOS by PHI LCO in TO-5 case. Brand new devices, all marked and easily removed. With with 2 page specs. #PLR 532 $1.00 each, 12/$1.00 shrinking supplies and upward direction of prices. this makes it well worth going into the salvage -1 business. This Super Mother Board can be stolen for $6.00 each or 6 for $25.00. We also have these PHONE PATCH KIT in ST 600 series DTL. So give your choice .. . 7400 series or ST 600 series. Mix·N-Match if youIncludes all parts, instructions, cabinet. wish.AM PATCH - $5.00 SSB PATCH - $9.00 #SAN $6.00 each, 6/$25.00 Poslage extra on above. MESHNA PO Bx 62 E. lynn Mass. 01904124 73 MAGAZINE

COMPLETE MEMORY SYSTEM 8 TRACK STEREO TAPE OECKMeasures 12 x 7 x 1 inches. Utilizes TTL With built-in stereo pre-amp, 115 volt drive motor, channel indicator lamps. Unused.ICs. 10240 memory cores. 9 installed sense original boxed, Jess cabinet. Customize your stereo music center with one of these tapeamps, addressed as 1024 locations. I/O lines decks.include 9 data -in, 9 data-out, 10 address-in, #46 $14.00powering status and control. Only 40 sys-tems on hand. Schematics included.# DCU $150pp AUTOMOBILE REVERB Info co OOOb llf~Brand new fully assembled, ready to install [OooeOeo]I~a.. J~ A1<I! URR-13in your car to give 3rd dimension concert ~hall effect. Complete with instructions, rearseat speaker, grill, wires, plugs.# 05 $7.0015 AMP BATTERY CHARGER URR-13 RECEIVERBrand new G E transformer, 25 amp Listen in to jet planes. Air Force 1. U·2 spy planes. FBI, etc. They use the frequency covered by thisfull wave bridge. Output approximately receiver • . . 220 to 400 me. Possibilities of15 volts up to 15 amps . Ideal battery covering the 220-450 me band by re-tuning.charger or DC source for general use . Operates from regular 115 Volt 60 cycle. requires only antenna and sp ea ke r. Tuneable through theWith instructions. assembled in minutes. frequency. direct reading dial. Schema t ic and write up on this set furnished .PK-4 $7.50 Visually OK condition ... URR-13 - $50.00 RCA TO-XI TUNNEL DIODE Original packaged, each factory marked, with spec sheet. $1.25 each, 5/$5.00.TV POWER SUPPL Y & TRANSPORT CIRCUITA complete assembled PC board, spares froma video tape machine. Many many finecomponents to be found. One section of theboard used as a 12 volt and 24 volt regulatedpower supply. You add the transformer andoutput will be 24 volts transistor regulated Used, look good, with schematic, receiver oras well as another output of 12 volts transmitter. Frequency range 1.5 to 12 MC.transistor regulated. 3 amps on the 12 volts Three bands, VFO or crystal, voice andand 1 amp on the 24 volt section. Full CWo These sets Collins design, becomingschematic of the complete board included. scarce.These are unused and cost in excess of $200.# B74-1 $6 or 3/$15 RCVR or XMTR $35.00 Postage extra on above MESHNA PO Bx 62 E. Lynn Mass. 01904FEBRUARY 1974 125

valel1tmne7400 s .25 7440 .25 7496 1.00 TRANSISTOR S 7442 1.10 74107 .60740 1 .25 7446 1.35 74121 .60 NPN TO· 18 ge neral purpose7402 .25 7447 1.25 74122 .607403 .25 741 23 1.10 silicon .157404 .3 0 7448 1.25 74125 .657405 .30 7450 .25 10 0r more. .10740 6 .50 7451 .2 5 74126 .657407 .50 7453 .25 74 141 1.25 PN PTO ·1 8 general purpose7408 .30 7454 .25 74151 1.107409 .30 7473 .50 silicon .157410 .2 5 74153 1.407411 .30 7474 .50 74154 1.70 10 or more, .1074 13 .85 747 5 1.00 741 57 1.407416 .50 747 6 .65 74 164 2.00 2N2222 INPN I TO·18 .257417 .50 7483 1. 25 74165 2.007420 .2 5 7486 .50 74166 2.00 10 or more, .207430 .25 7489 3.25 74181 4.507432 .30 7490 1.00 74 192 1.75 2N2907 IPN PI TO·1 8 .257437 .50 7492 1.00 74193 1.50 10 or more, .207438 .50 74195 1.1 5 7493 .80 74200 9. 00 UNTESTED on 7495 1.00 All ma rked units, dual in-li ne packages. 20/S1.007 SEGMENT DISPLAYS POWE RSUPPLY KIT PS 5·1 5 volt 1 amp regulated power supply kitMAN3 $2 .00 4/$6. 00 with p.c. board and instructio ns. Board co m. cat., .125 in. high me asures 2\"x6\"; completed kit is 2\" high. Transformer has internal d . shield.Man 4 $2.75 4/S8.00 com. cat., 2 in. high $ 10.0 0MISSING SEG MENT/NO DE CIM AL POI NT WI RE WRAP SOC KETS s .50 (ta ke your chances; no ch oice) .60 14 pinMAN 3 $.25 1.25MA N4 .50 16 pi n 1.35 24 pi n 1.80DISCRETE RED LEOS 1- 9 10+ 28 pi n 40 pin .05 wire-wrap socket pins .04 100 or more,MV10 TO ·18 $.25 .20 LEOS .35 .30MV5Dtiny .35 .30 LED lOR - Pack of 10 discrete red lensMV5024 diffused LEO s, vario us MV5020·series types. S1.50 LE D lO C- Pack of 10 discrete clear lensbright red lens .50clear lens, fish ev e .50 LEOs, various MV5020-series types. $1.50DISCRETE COLORED LEOS Applicatio n note included.MV1 amber .50 RECTIFIERS & DIDOE S s .1 0MV5020 type , amber .50 lamp 50PIV silic on rectifierMV2 TO·1 8 green .75 .70 3amp 400PIV silico n rectifier .25MV5222 green 1.00MV5322 yell ow 2.00 FB50 lamp 50PI V bridge rect ifier .60 40429 triac 4amp 200PIV, brand new 1.00JUNCTION HTs, rn -t acese 1- 9 10- 99 100+N·C HANN EL : SIM ILARTO: 1N91 4, brand new $.10 .07 .0 5NJ FlO 2N4416. MPF102 3/$1 .00 MEMORIES MM1101 256·bi t static RAM S2.2 5NJF 11 2N4091 ·93 4/61 .00 MM 5260 1024·bit dynamic RAM 6. 00NJF1 2 2N433841 4/$1 .00 %WATT RESISTORSNJF1 3 2N 3089 3/$1.00 all values listed are $.05; 10 or more, .04 ,NJF1 4 2N4221 ·22 4/$1.00 We have: 150n , 2.2 K, 2.7K, 10K, 12K, 18K, 47K, 220K Please specify how many you want and of which values.P·CHA NNEL : 2N3 382·86 4/S 1.00PJF 11 2N2 608 4/$1.00PJF 14 All FETs come with data sh eets. RGS ELECTRONICS (408) 247-0158 3650 Charles St., Suite K, Santa Clara, CA 95050We sell many ICs and components not listed in this ad. Send a stamp for our freeflyer. TERMS OF SALE: All orders prepaid; we pay postage. $1.00 handling chargeon orders under $10.00. California residents add 5 % sales tax. Please include name,address and zip code on all orders and flyer requests.126 73 MAGAZINE

SANKEN HYBRID AUDIO POWER AMP 1.95 Mfa.'. TYIN W.tt. Sa.. 2 .95 o 51.1010Y 10 S • .•• 2 .10 o 51.10251: 25 1 • .•• 2 .05 o SI.1050l: so 29.95 2 .50 3 .20 HI·F. 1 \" 3 .20 2 .10 2 .10 2 .10 1,20 4 .90 1.20 2 .50 1.95 1.95 1 .95 1 .25 2 .50 2 .50 2 .65L1TRONIX-OPCOA-MAN \"7-SEGMENT\"Lm Readouts MR••'...1.1. LED c!..... ct. . Color....o M\"'N·l eq 1READOUTS - TYPI: SI:r. O'.pl.y b tc: im.1 Mil. 0.1 ..... I:.ch Specl.1....o MAN·IA....o MAN·JI eq_11. .2 7 V• • 2. SIlI7447 S3.'S 3 for $10.....o MAN .3'\" a-q...I' .2 7 V• • SN7447 3.'5 3 for $10.....o MAN-3M _I' . 115 V•• ,2,... SH744. 1.&' 3 for 4.50....o MAN -JI equ.1 .IIS V• • SN744. 1.&. .127 1.,,.. SN744. 1 ,&' 3 for 4 .50 .11S Yo. SN744. 1.50 MAN ·JlM a Qu a l ' ..lS SN744. 1.50 3 for 4.50 ••• SN7448 2.50 3 for $4.....o M...N·4 equ.I' SN744. 2 .25 3 for $4. .12 7 A• • V• • • • • 3 for $&.....o M\"'N·4 aq u. I' .19 0 3 for $5~ .190 V_ Y• • •••\"REFLECTIVE LITE BAR\" (Segment LII:0 R ,.douU)fJ 707\" (MAN·l) . 3 3 Rad Y., 20 SN7447 2 ,7S 3 for S6.o 704\" (MAN.4) ,33 Rad Y.. 20 SN7448 2.75 3 for $6.o SLA_l\" (MAN·U . 3 3 2 .7S 3 for $6. Red Y.. 20 SN7447 2 .25 3 for $5.o 5 I-A· I \" (MAN-U .:U AM IlI0 20 SIlI7447 3 to.- S6_ R l' m o v e d t r o m new I'Quip- 3 for $1 •• m e ntl In el u d e . p op u l• • 3 for 3 for $13. 2 ~ 174 ' d o o r k n o b ' Ir. nai\" . 3f... S , .o 10.pc. kit Same ... our famous Us k Poffer & Brumfield $2.984tJ1J;O·to-. _Iy,. t4h1~6 eb\wlt h0o/. lI qu ~. t op, f or 3 SO wi.h t o d ...l.-n KAPRELAYS EIcelle.. 1 fot \" HAM\" uu ....nten... . wiIC hi flC. I.tchin• • / _;r _ ~. all t ype. of t oueh-tone a ya· tr....m lt . receive. e l c.• Uld 1 0 0 'a o f eommerdal o r ill_ d uatr ial u..... Incl ude . pl. .l lc d ual · co v.. r with diU'''''• • tern.. number eont rol for Uld hookup in lo . ii_ p in p lu. _ln b.... eont.aeta m o vab leCALCULATORKEYBOARD Ha m work...quipment of .all a-old ll... tl~ d .il v... at.t io n... y overl ay. w ilh a ilv u .,11.<I_ t yp.... alarm o r IntrUSion mium o.id e m o v. bln. All cont .cta 10 am p 3 P OT . con • y.tems of all type•. d . t • •ll I1 VAC 22 11 0 ohm•. 17. 11 m• . 12 VOC 21 m il •SWITCH KITS 1 6 8 otlm • . Si .. ; 2 ./,,\"' ,. 1 11/1 6.... Wt.\" ou . Ce otu pi n 0 12 VDe mi ni... . Com • • MIa-. typ~ ~qu.l too . 0 II\" VAc WEST COAST MAKER OF L ..,. '8gNATIONAL EQUALS ON 4.M¥'!iiOS4 \"DIGITAL CLOCK on a CHIP\" 1.MV!ii222 Mf•• II O lpllo..§ 1.MV5322 ...\"lO' \" C h ip \"o ~.MV5080 s 0 5 3 11 2. -p e ••• m ..... .ny .....:Ioul. S8.8. e _cU alt.. A·B -DINTEGRATEDCIRCUIT 'HAM' UHF 400 MC 0 O S3 12 24-pl... e•••mle••ny ....dout. $ •.•8 HIGH POWER 3 f... SID. 4 ·dlalh: C.OSOCKETS TRANSISTORS 3.95 0 5 3 13 2. ·plll, .,....mlc....__ ....dout. 5 • •&8 &.dIClt.: ... ·C 24.pl... pl.atlc. LED ...d 5 • .••O I . _P DIP . . ... S .45 0 5 3 14 By RCA or \" q ual 2 :'1i 36 3 2O I 4 . PI Wlr. W ••p . •5' lo..:...d.K t • ••6ou'\" a ·d•• lts: \"'_8o 14.PI 51.... Mount 1 .00.,:J-I e -P I\" . DIP :<0 1'1'0. 2 3 watte, 3 a mpll. o 531a 40·p''', ..or 1 .I.rm. _ u 514.95 .I.rlll••I. .p t l _ . 4·dl.-lb:8TO-S. & Of' 10·PI 50 m.,.TO · 60 case , w ilh st ud m t lt. VCEV 65. 2' IU.L19\"- Code: A- Ho ld Co\"n, . C-- I PI'S Oulpul.LED MITY DIGIT \"DeM'S\" 8-Oul oul S trobe. D-BCD o I~MMSS1 •• DIGITAL ALARM CLOCKSc'e n t i fic O\" v ,c\" \" \" O iKit a l Cou nt in g Modu le . \" o u t p e r- FACTORY FALLOUT _ 51 .4' £ACHfor m . n)' o lher DCM o n t h \" m a .k\"t t od. y . Mor\" fl'. -l u. e. t h \" n \" Ve . be fore l Not g . ...OU$. n o t inca nd\" .ce nl\" . T ••ma: a<ld p OMtaKe R.t.d: n.. t :'1 0n ol n i x ie but t he mod .. . n LI-;J). C h oose f.om \" u ch .fam ou s Only Ph.... O.de.,, : Wak el\ e ld . M ....\". (6 1 7 ) 24 6- 3 829ma n u t\" c t u re u ... ~ Mun\" \"n t ,, ·. MAN.I . M AN .4 . Llt.un lc a .... :J_ $9.99 H.t.1I1 1 6 _1 8 Del C a rmi ne S t .• Wake tl l'ld. M . ....7 0 7 and 7 0 4 . Op c o\" ',, S LA· l (t he 1\",,1 4 h liv ing c h lirac ' ..ke 10... ( off W.tl'. S l r..etl C. O . D.'S MAY BE PH ONEDt ... h\" iltht. o f 0 . 3 3 lit n o e \" tra ('harlte ) . B.c h k it In. RF.AVO UT Ch ,... Ma k e. o 15C CATALO; on f iber Op t ic s, 'res'. SemI's. P.rlSel ude \" :! x 2\" p.e boa.d w il h tln Ke . a fo r a t' Rt; E ..dKeconn\"et o• ••id... m ounting d ip aocket. LED . I'lidout nf 0 MAN· I .27 h . M t .. POLVPAKSyour cho ic ... •..\"is to.s. 3 IC '.. .nd Mo l.. x con eecto re 0 MAN-4 .1' h . Mo to . 3 3 h. Lltr_lca(th i. F.LI M I~ATE..<; SOLDERI NG YO UR IC'. I . -.I 0 707.booklet. INCLUDES P.C. £OGE CONNECTOR - FRI:I:I 0 7 0 4 •• .33 h. Llt._lca P .O. BOX ••:lA LYNNFIELD. MASS . 01 ....~ P in .lo •• p il;, ·M A.~_ i~ · · P io.to •• pi a M AS _4 ... I~c. c h. r .... m eD $L.A·I' . 3 3 • . Opc_