Kra

Standard Key, nickel plated hardware, no switch 6.65. Model 310-003 Standard Key, nickel plated hardware, wuh switch Model 320 001 Standard Heavy Duty Key with nickel plated hardware, no switch 8,20, Model 320-003 Same as -001 ex-ce pi with switch 9.35 Model 404-002 SSK-1 Chrome Plated - S29.95, Stack Wrinkle Finish - 23,95. FutW VSWR & reverse voliaac protected No tuning reputed across band SwitchabU- Class C or AB operation Built in TR switching w, increased delay for SSB...

L

The unit assumes that il there is going to be a down count, then the fourth pair of counter inputs (labelled COUNT4 and DN LJP4) will be set for a down count. It can only correct for a single change of count direction so ensure that all of youi oscilla-tori which require up counts are connccted to lower numbered inputs than those requiring down counts. The control logic provides the signals which cause the multiplexer to scan the four inputs, store the tinal count, initialize the counters, and...

For Value

The SwTPC 6800 in as basic form comes complete with everything you wilt need to operate the computer except an 1 0 device. This may be either a teletype of some kind, or a video terminal. You get a heavy duty an-nodized aluminum case, a 10 Amp power supply large enough to power a fully expanded system, a mother board with seven memory processor slots and eight interface slots, a 2r048 word static memory and a serial control interface. This kit is now only 395,00. It was introduced at S450.00,...

Qc

SN74 75 wiring Note 'here are four bistable latches in the 7475 package. The BCD hi wry code may be applied to any of the four latches desired. The BCD data to the 7441 decoders must correspond, howeverIn other words, there are no defined BCD inputs or outputs - they are up to you. There have been many articles published on the subect of automatic identifiers, One might wonder what new could be said on the subject. Read on, and discover a circuit with the following features 2, May be...

Video

Daddy cuss each individual component as he assembled I he massive board. Then came the moment of truth. Power on. It uould be unfair to say that it didn't work. H did work and the kids were completely occupied tor about three weeks. They then gol tired of ust bouncing the ball back and iorth in the same ping pong game ail the time. Wilbur, can't you keep those kids quiet while I'm making dinner ARRRRG This painfully familiar story serves as our introduction to the world of TV games, here are TV...

Custom Transformers

HEAVY DUTY REPLACEMENT TRANSFORMERS* ETO A-77D Plate Transformer Henry 2K Plate Transformer . . Henry 2K-4 Plate Heath Marauder HX-10 Transformer 75.00 *AiJ Heavy Duty Replacement Tran sfor m er s are posi t ivel y guaranteed to run cooler and last longer tfran the original units.

DRAKE

. 100 watts of raiding - J wntt 1 * Low Cos* All Solid State Built-in AC Power Supply Selectable Sidebands TRANSMIT * vox Of PTT or S5E Qt AM * Input SSfl. 300 watts pep AM 26 watta PEP twiirotitfti Cirrifir compni& i*1 wirn SSB linaarsL CW. 260 wallt Arfjuhloble pi-n< Lwork Till HAT WE ELIMINATED CUTE DC I VI WITH THESE DRAKE N LI Ella hb*1- li-ji l h- iht flil nrqff hi . i m i l- lhut *-r1r fettfflftr ' ' 1*.' B lr ' * tl*l ' ' '-ffl ' wed > ooo * 3iii npvi rga it an fi Ffrfri

Info

Six TV game chip can make you a hero Ciarcia id 110 A TTL Tester - great for unmarked bargain ICs WA9VFG Jjl 114 How to Check Memory Boards - making those confounded uPs work W2HBY A 128 BASIC What's That - the basics of BASIC WA1GFJ 132 Is It the Band or My Receiver the

Bereaoh Sept

The '76 Cleveland Hamfest presented by the Cleveland Hamfesi Association will be held Saturday, September 11 at 8 am to 6 pm at thi-Cuyahoga County Fairgrounds, Berea, Ohio. Eastland Rodd entrance only 10 Counry Fairgrounds with easy access from Hopkins Airport, Interstate I 7T, I 90 or Ohio Turnpike, Tickets ST50 before August 33. S2 00 at 0800 for all 12 or over when gates open. Asphalt t uari lea market parking Si aricJittonal per space at 0700. Bring your own tables and shade. Registrator*...

Software Support

It s actually your excellent I '0 section that I'm subscribing for. Byte haJ not lived up to its promise, and you have the ui on and imagination evidenced by the July editorial on the future of the home computer to expand the 1 'Q suction wonderfully. Count on me to support your plan to distribute wihware. I'm in ihe market for anything entertaining that will run on my IMSAI with George Morrow's cassette board and PTGo's video board and BASIC and 20+K of RAM and still growing. in the meantime,...

Amphenol

SEAIES5B1 - PACKAGED CABLE ASSEMBLES All popular lengths are now avaikible in your choice of RG 8 U or RG B8 U type low Loss poly foam dielectric cable Instiled PL-259 connectors are ASTROpLattct Araphenol s new non-tjJ-nishing fmtih which hjs .ill the dd'-jin. ts of precious mttal plus moie heal, currosion and abrasion resistor that silver ever had rg 5s u tvpe poly foam coaxial i assemblies 58 -581)3 3-fu with astro plated pj 259'son both ends. . . . 581-5812 1 2 1. with pl-259's on both...

Eliminate Interference To Tv Sets With Ameco High And Low Pass Filters

The AjiiLO low pern fiJrer iuppjeive* e 'ocfiohor of oil ipjriou) i-l '-.L'i JO Mt M designed for CotJ of cob'e 153 io 72 ohiruL Oilier leoiufti include Negligible Inseriiort Loss, 35 tib ciricJ ijioh dHenuation o La-monk ond spurious Iraquertties cbow- 30 MC , will handle up to 200 of ftF Mode HP J5 it p > vtcuoi h ,jh-ptm filter. A frequent tfi above ib mc am pesied through w.thout lo i OHitrt Jeoiurei include 0 db ond mure Qtienjo- ian pr 14 MC ond below. 70 db otifimjotfDn uf 10 metert...

Orkeo

I'S'iJ.fi tfrnf Amotvr Hq& P C'fti& i h t n.ttfH r fif COU> firmi p QSO's wtfA cli 4 .WiJssacfhJjQfti Gwnfti i tferr _ Qu TH SHORE 'PCATE* ASSOC J r Set W Ffrn, fit a 02 86 Compatible with all sub-audible tone systems such as Private Line, Channel Guard, Quiet Channel, etc. Powered by 6-16vdc, unregulated Microminiature in size to tit inside all mobile units and most portable units Field replaceable, plug-in, frequency determining elements Excellent frequency accuracy and temperature...

Becomes The Perfect Rig For The Novice And Technician Class

Ask any of the thousands of owners about its dependability, look at its features and specifications .and the reasons for its unparal-led popularity will be obvious. FREQUENCY RANGE All amateur bands 80 through 10 meters. MODES OF OPERATION SSB upper and lower sideband, CWand AM. SOLID STATE VFO Very stable Colpitis circuit RECEIVER OFFSET TUNING (CLARIFIER) Provides 5 khz. variation of receiver tuning when switched ON. FREQUENCY STABILITY Less than 100 cycles alter warm-up, andlessthan J00...

Upgrade Youp Repeater With A Rf Technology Duplexer

ALL DUPLEXERS AND CAVITIES ARE TEMPERATURE COMPENSATED WITH (NVAR AND MEET ALL COMMERCIAL STANDARDS ONLY TOP QUALITY MATERIALS GO INTO OUR PRODUCTS. BOTH KITS & ASSEMBLED DUPLEXERS AND CAVITIES ARE AVAILABLE TO YOU AT A SAVINGS TO YOU, Mod. 62-3 6 cav*. 2 mtr., insertion loss 0 6 db with isolation 100 db typical pwr. 350 w. Kit 349 ea -Assembled 439. Mod. 4220-3. .4 cav. 220 MHz insertion loss 0.6 db with 80 db isolation typical pwr. 350 w. Kit 249 ea, - Assembled 329, Mod, 4440-3, 4 cav....

Dentron

Want an antenna tuner to match v .ef y thing betw n 160 and 10 through balanced line, coax jnt and random line pump out thd full legal limit and look and sound good doing n Sopertunor T is ihe one for you at just 129.50 aligned and engineered io he c onipaiIb e with the full power hiQhly efficient modern amplifier now available to the amateur In our opinion t e finest timer on in* market Here's an antenna tuner for 80 through 10 meters handles lull legal power nd matches your 62 ohm transceiver...

Magazine

Own and Give the Double Eagle ftndant as a Permanent Keepsake of the Bicentennial-only 7.95 Two delicately rhiselttf majestic American eagles, symbolizing the iirsi two hundred years of the Uniind Slates of America, form he design of this beautiful ke psiifce authored by th*> U.S.Historical Socieiy ' ine eagle looks proudly to America's past, the other confidently to the future Create for the Society by the famed Medal Mr An craftsmen who designed and made the official Inaugural Medallion for...

Iv

Most of the C oscillators are designed for clock, counter or other continuously running circuits. You may have to experiment to find a circuit ihaL works well when keyed fast, such as one used for a CW transmitter. Here the monitor receiver is first choice. If it sounds OK locally, it will probably work in the finished circuit. With the circuits tried, it was hard to find one that wouldn't work ove a wide range of parts values, I ndi vidua requ iremen ts would suggest some testing to see that...

Ckk

E2 Parque Dr. Tempe AZ 55282 With the proliferation _ _ of subbands and inierference-obscured net frequencies, the use of an accurate secondary frequency standard is both good operating procedure and also helps Till our legal requirements for frequency measurement capability under FCC regulations. In addition, such a standard can be used as a time base or signal injector to test digital logic circuits. The WA7VVC frequency standard was designed to be a low cost...

Lambda Diode Circuits

Transistor Lambda Diode

777 5 s j top view showing how two complementary transistors are connected to form a Lambda Diode. JFETs from Radio Shack 276-112 were used in this instance, although a 2N4360 or simitar could be used for the p-channel and a 2N3819 or similar could be used for the n-channeL region on the characteristic curve of the device that makes it possible to achieve amplication, pulse generation, and rf oncrgv generation. While the funnel Diode held great promise when it was firsl introduced, it seems to...

Graphic Symbol

Fig. 2. lhe Lambda Diode is a two terminal device consisting of a pair of t omplementary depletion-mode junction-field-effect transistors connected as shown. Fig. 4. Like the Tunnel Diode Lambda Diode displays a negative resistance characteristic when its bias voltage is increased past the peak shown on the graphf Fig. 5. The Lambda Diode makes an excellent electronic fuse when it is used to supply bias to the transistor it is protecting. An increase in current will cause the voltage drop...

Rtl Cookbook

Explains the how and why of RTL Resistoi Transit or Logic and gives resign inlorni.jrion thai lt an be pot to practical bsti. Gives multitude ol digital applications rapping from the basic switch tci the sophisticated counter M0 BASIC lt . . by Bob Aibrvc.hi, etc. Self-teaching guide to the computer language you will need to know for use with your microcomputer. 324 pages. This is one of the easiest ways to learn computer programming,

Til Cookbook

Explains what TTL is. how it works, and how to use it. Discusses practical applications such as a digital counter and display system, events counter, electronic stopwatch, digital voltmeter, and a digital tachomiiicf 336 MY COMPUTER LIKES IVIE when I speak Basic An introduction to Basic . t . simple enough tor your kids. If you want to teach Basic to anyone quickly, this booklet is the way to

Cartg Worldwide Rtty

DX CONTEST Starts 0200 GMT Saturday, October 2 Ends 0200 GMT Monday, October 4 Not mure than 30 hours of Oper .it ion are permitted, IN On'Operating periods can be taken at any time during the contest, but a summary of times on off must be submitted with scores. Use all amateur bands 80 to 10 meters. The ARRL country list wilt be used for country status, with KL7r KHB. and VO being considered separate countries. Classifications include single operator single trans miner , mu'r lt operator...

Vehicle Wound

DfltLl AN0 TAP FOR S 12 5CP -OLI- TFAiLt - on EOU ' ALE J i 5 lt A.AT vfc 5-paCE 11 to J t ji - HSUl HG DASHER trimmers cannot be located, start out with a fixed 820 pi silver mica. It is very possible the 820 ph will give an swr ol IJ I or less. With the assembly installed on the vehicle as in Fig, 12, connect the antenna noise bridge in the line and look for the resonant point on both bands. Using the braid-covered bike whips, each 50 long, will piacc the antenna quite low on both bands....

Meter Sg

Although integrated circuits for a 500 MHz frequency scaler have been available for a number of years, their price of 50 and up has been a stumbling block to the average ham. Recently, however, Fairchild introduced heir I1C90 UHF decade counter which, at on y 16 in single quantities, represents a real breakthrough for those needing a way of counting frequencies to 450 MHz Lind above. Although operational' this IC is only guaranteed to 550 MHz, the typical IIC90 will reach 650 MHz and beyond....

Cwbg

The TV-502 transverter puts you on 2-melers the easy way. Simply plug it in to the TS-320 ior TS-520J and you're On the air Operates in the 144,0-145.7 MHz frequency range wiin a 145 0-146 0 MHz option Si Dunn K5JRN 3607 Binkiey Dallas TX 75205 ostal iLi can do funny things to a ham. Recently, I recalled the one tube transmitter that first got me on the air as a Novice hack in 1957. And before I knew it, i was doodling a schematic and looking through my junk box My first 6AQ5 oscillator was...

Eeo

I.2SV, -'it1 F't tid f -mei r unntviu raJ. .nn'foLan. pf J 11r MK L. convert a lt - tHy lt . .n r nl . - 1,-0f Li- M. LHl ri mi COnl L,_t Jn r I,ii-rn lt lt , r.hii i chcol t L - -C 11 . rtTv-tO -Ii Hint- ,-JH-n, t-r , , h 1 rnimir- C fcOftH rl I ni h f lotlp ped, Mull it m I t MlUlJliJ 4'M Jr. trlniLJ'if, p ME4Hi-tntr, dii rnm, iif gt 1 I ri in hi knL r 11 -n c I ri iii i rtf'cit I 1 ii Villip, f nil,3 4 I n i . I I'M .Mil, 1,1 r.il . I Mf liryi NLl Ho. I.2SV, -'it1 F't tid f -mei r unntviu...

Teletype Code Conversion Chip

VU5220 amp 1 can .-m 5 1 wl s. d t s e ni ASCn, Lie I - i . chip to mnkr rtjui ltd M rolt. tfl your rtflfl CDfnpu r, 11 a.00 speci far I he lAajn, , ,30 Only T X 1.5. rYpvf 5 TO TS VDC, tw p 60HZ J,auorii ave f porfnhle nr rnoiiile ek . PC boar'J s drilled i mtbk-60hz b8 70HO5 Vol hog ragjlafur. Falrchild 5V, 5A, TO-3 regulate . Tnitc care of ihcqe hrnjvy cmiftnfr requtm gt onti without wp'jrtire rr ju at or paa tranjij r cams if oH ans,, Lke it tti th- J e it -il i dito ' il r i rt OS h, tome...

National Multiplex Corporation

3474 Rand Avenue, Box 288 South Plainfield, New Jersey 07080 . , . Data Recorder CC 7 3 gt 149.95 Please enclose 2,00 . , . Data Recorder CC7A 169.95 on each Recorder Operating amp Technical Manual Schematics includes Software amp Hookups for 3080, 6800, and I O. 2,00 Cash Chuck PB nkA ricard ggjg Charge

Sa

Clear of signals and ihe skip is short CQ and QRP1 usually good for tow ppvyer DXing A results in a contact and -i query How much power you running, OM XTciI 30 meter or 40 meter fundjmentai crystal Jan Crystals. 2400 Crystal Drive, Fl Myers FL 33901 R1 - 100,000 Ohm, X Wan R2- 2,200 Ohm, 1 Wait R3- 100,000 Ohm, 1 Watt Ct - 3 to 30 pF trimmer or C2 365 pf broadcast band variable capacitor C3 - 220 pF disc ceramic or mica 4,5,6 - .01 uF, 600 volt disc ceramics Parasitic suppressor 5 turns 22...

Molex Pins

Mini Slide Switch SPOT 6 S1 00 Reg Slide Switch DPDT 8 1,00 Push-button Switch N O 7 Z00 Rocker Switch SPOT 8 Sl.OG 3 8x3 8x1 4 ' high 2 for Si .00 RCA CD4046 AE S1.50 5 5. 14 pin - 9 S2 16 pm - 4 S1 18 oir gt - 3 S1 40 pin - S.9S ea PLEX1G LAS for Digital Bezels gray or red filter 3x 6M x 1 8 ,95 ea. 4 3.00 ,4 Char, Hi, 7 segment LED flED Com Cath BOX 219 HOLLYWOOD, FLA. 33022 305 921 2056 BOX 219 HOLLYWOOD, FLA. 33022 305 921 2056 QankAmer icardr Muster char qt or C-OD. order accepted by...

England

WADM CONTEST Starts 1500 GMT Saturday, October 16 Ends 1500 GMT Sunday, October 17 Use alt bands between 80 and 10 meters on CW only. Stations outside DM call 'TO DM, while DM stations wiM calf CO WADM. EXCHANGE Si.ii ions outside DM send usual 6 digit number. R5T and serial number starting with 001. DM stations wilt sertd a 5 digit number consisting of the RST and the number of their Kreiskenner. SCORING Each station may be worked only once per band. Each completed QSO with a DM station counts...

Mms

Crc ol 13.579545 MHz gt 1.75 -I nroi r COUNTS. MM74C924 tt a .i df P counter tth 7 segment oulpul. Cur y output Tor t lCoding and fntafritttl i5plq gt - ci .jllows jLj pjttin of CDLjntnr nr 10P ai lo cHe. 3 it- . c j-Tfit rtn. Gre f foi cloct- e.-tr errj t t ucmcy Quirin. WM74C92 - rh spec sbeef . SI 2,00 UNIVERSAL ACTIVE F11 TER IX. AFIQCMCJU pjuc oge of 3 separcT atl i vt fi Itan cni IirtI frd ikJf i'iii-l'Va orrip t v ke h - , btmd-mn, i etch h ghflr Orden c za-tading. a terwortb, B ise C...

In Quantities Of Or More

KIT INCLUDES 6 LED Redouts FND-70 .25 in. Red, com, earhode INSTRUCTIONS 1 MM531 4 Clock Chip 24 pin QUALITY COMPONENTS Switch MONEY BACK GUARANTEE 6 Capacitors ORDER KIT 850 50 or 60 Hz OPERATION 5 AN CREDIBLE VALUE 12 or 24 HR OPERATION Rrafetort 24 Mole pins for IC socket Kit 850 will furnish a compiete set of clock components as listed. The only additional items required an7 a 7-11 VAC transformer a circuit hoard and a cabinet, if desired Printed Circuit Board for kit 50 of B5G4 leiched 8-...

Clock

Routines in PROM which would handle data transfers to and from a cassette, to and from your TV Type writer, and output to a low cost printer. These routines could be developed using RAM memory, and after dubugging could then be trans ferred into PRQMs with appropriate address modifications made . . . which hopefully, would not lead to further debugging being neededI, The SC MP PROM a 5204 can be programmed by your iocal National distributor bill Godbout Electronics, or Morrow's Micro Stuff for...

Rldrake Company

540 Richard St., Miamisburg, Ohio 45342 Phone 513 866-2421 Telex 288 017 - - nifty solid state ac relay gadget and on with a transistor, but whai do you use to switch ac A relay would work, hut this is bulky, and consumes power to perform its work. An SCR would work, cxcept that it can onfy conduct for about half the applied sine wave, resulting in half voltage being applied to the load. Or you could use two SCRSt connected back to back. However, this configuration is already available in one...