Info

Rence of pictorial aids1 a number of the photographs and diagrams are of questionable value because of blurry or crude reproduction. Prospective ATVers are likely to ask, What can I do with my station once it is built 1' Amateur Television in a Nutshell lacks any good answer. For amateurs new to UHF and video, the best source of information and help is probabiy an experienced ham, preferably living nearby. Amateur Television in a Nutshell is not a replacement for practical knowledge, nor is it...

Clock Kits

Try your hand ai building he finesr looking cloth on tne market Us saim finish nodded rilummum case looks great anywhere while si* 4 LED digits provide a highly readable display T ht& rs a complete kit no extras needed, and n only tafce* 1-2 hour lo assemble Vour choice ol case colors silver gold bronze, black, blue (specify) Ctock kil 12 24 hour DC-5 2 95 Clock with ii mln D timer, i 2 24 hour Alarm clock hour only., DC-8 24.95 Fot wrrtcl and tested docks Add 51 o 0Q to kM mice tumbo RED...

Lwj

* * i t t i f i t Km * * * * II wish to have my name removed from the list of subscribers receiving mall other than the regular subscription to 73 Magazine. M jI this form with your moling label Irom the latest issue (or till out the information as it appears on the latief) to 7 3 MjgAz-lne Subscription Services Dept. P.Oi Box 931 Farming dale NY I 1737

NRF

OAKLAND AIRPORT, CA 94614 2 GHz RF power transistor. Pd max ( 25 degrees C) 3.5W, Pout min 2 GHz LOW, Pin 310 mW, efficiency 2 GHz 30 . round shape, similar to RCA 2M5470. M.QTS4.45 2 GHz RF power transistor Pd 8.7Wr Pout 2.5W. Pin 300 mWL efficiency 33 , cross shape, similar to RCA TA8407.4fr,0> 5.35 2 GHz RF power transistor. Pd 21W, Pout 5.5W. Pin lr25W, efficiency 33 , cross shape. Similar to RCA 2N6269. -Wl 6.25 2 GHz RF power transistor. Pd 29W, Poui...

Callbook

Here's an offer you can't refuse You receive three, information-packed, Amateur Caflbook maps, folded, plus the World Atlas for only 375 plus 1.50 shipping and handling. If purchased separately, total value of map atlas offer would be 6,25, plus shipping. You save 2.50 and get these invaluable radio amateur aids Prefix Map otthe World, folded. World-wide prefixes. Shows 40-zone map on one side, 90-zone map on the other, Size 40 x 28 2- Map of North America, folded. Includes Central America and...

Features

I1 t High efficiency means low current drain Broad band design (no tuning . Direct 1 2 volt OC operation, Indicator lamps for On Off and FM SSB. Relay switching (allows you to put amplifier in or out of circuit at the flip of a switch)- Insertion loss of less than 1 dB, 90 day limited warranty on parts and labor.

Novat Ion Amateur Radio

For over 18 years, 73 Magazine has been the innovator in amateur radio. 73 led the way in developing the use of solid-state circuitry, and was the firs to pn mote such things as SSTV, radioteletype, computer applications for radii) communications, and single sideband. Radio electronics lias changed as 73 has changed. Ever notice how other magazines published in the field of radio electronics are just like the ones before them Same old subjects in every issue, same predictable views* same old...

Oi

PC card layout for Mark ii Complete kit with all components, PC board, and wire harness, but without meter (available from Hy-Gain) is 8.00 from Melco, P O Box 2b, Marissa tL 62257. phone with a Knowles BA1501 Knowles Electronics, 3100 N. .Mannheim, Franklin Park, Illinois 60131). This realty helped the audio response as noted on an audio analyzer A few component changes also are in order to achieve better audio. Change R78 from 3.3k to 1.5k, C11I from 0.1 to 47, and C118 from 0.15 to...

Vct

Filament transformers connected to yield the required input voltages to the regulator. full-load ripple comes down. Then as you add more capacitance, the ripple goes up What is going on here As you add more capacitance, the phase angle over which you draw current decreases. This means that you are not continuously drawing 1 Amp from the transformer, but, instead, you are drawing many Amps over a short time to yield a continuous load current of 1 Amp. Transformer core saturation and...

St Louis Mo

18 Is* Reader Service see page 179 Detachable control head of the IC-tiO, remotely mountable 2 meter mobile transceiver The totally detachable small front section of the IC-280 houses the microprocessor for frequency control and memory The IC-280's control head can store three frequencies of your choice which are selected by a four position front panel switch and these frequencies are retained for as long as power is applied to the radio's memory pin,,, even when the front pane switch is turned...

Sstt Rasdoh Wire

All bimtis ( fiO-l(> mP) wltli uuy Wire * SQ0 Y output * Nome or purtiibiC * Neon tuiiou indicator. Ttibl K48U orMJfYIOA . iOOCUV PHP i.s i scnieo. a-i SST Ctrl 4 1IK. a ( H< Giniit reel USD numerals. Month u Kl (toy also itf push of fait urn* Hcauilfii for your desk. lflVAt SST IE-1 II AI I X for balanced Hiww. C all 7B-*8 7 1m order t .OJ VISA* Send a cheek or money ordcT- or use your M-f . or VISA Villi sllipfHnfJ and Inim ijty. C ltr resident*, mid sEile tn*. Gu TBdtc AH SST prodtKih...

Imyl Dlts Lzkrr Cob Guup

244,925 183,150 182,250 153.655 152,800 F. Rossi OKI 11857 B. Niendorf G8CDW K, Wustner 218,550 209,700 206,640 72,600 70,265 After my article appeared in the April, 1979, issue of 73 (The Heath Kenwood Connection), I found a small refinement which could be added to the project. Its total cost is small and it should take only a few minutes to install. 1 realized that one could use some method of instantly bypassing the remote vfo aside from using the function switch on the remote vfo. For...

Doubling

In the midst of the confusion generated here in JA KA land by the FCCTs new system of assigning amateur calisigns, a dim ray of hope came to me the other day. I1d like your opinion and the opinions ol your readers on this. What about doubling the number in the present KA callsigns in Japan Instead of KA2RF, why not KA22RF instead of KA60J, why not KA6SOJ I'm not sure if the authorities here would go along with the idea, but it seems worth a try to me. As I understand the system here, the FCC...

Computer Cassettes

UAUTV C-15 CASSETTES .RASTIC CASE IKUUDE 12 CASSETTE CAPACiry 1 - ADDITIONAL CASSETTE AVWLAaiE fl* ____ . - -. . iOk* no & Cttndtt) UHF Channel 33 TV Inltflace ftil Kit Wille Banfl fl-W or COc Sysifm * Covins TV to vttfw OtM hOiTW OTTTiiiiiirs. CCTV camvri. Apple H. worKs Cn ndco zier, S0L-2 . IRS-M Oiaiicn r. etc a * Includes toaairil cable and jnienrta Provides 3 bint w tfwmj jtTm sine. Viangie A squirt wavi FiEquenry ftfli tfom Hi TD ' Ouipm pntimunr ham G-y& Ht to w c wem puk 1...

Kenwood

This unit allows tm- operator to work spin frequencies, find a ctear frequency hue holding (he original one It has new features is the T-F set switch which pre enis mJS-ope call on in double split frequency operatrpn and aids in qmo selling of iransmii frequence 1AIL ORDERS PO BOX i 1 347 BIRMINGHAM AL 35202 STREET ADDRESS 2& 08 7TH AVENUE SOUTH BIRMINGHAM ALABAMA 35233 Deigned io match me TS*120S ihts unil supplies regtraieo 13 VDC a* 15 A continuous SDA tntermilt nl load a i- c rr. plete...

Memory Chip

Now you can play with memory without playing havoc with uour budget try our 21LQ2 special, and get fen IK static RAMs for only 9,90 (that's less than 1C per byte ) These are low power units, suitable for use with an 2 MHz computer system, and are new. prime, high quality parts. TERMS Add t Handling to orders under 315 Allow up to shipping, more for power supplies (excess refunded), Give street address lor UPS delivery VISA< Mastercha - call our 24 hour order desk ai (415) 562-0636, CODs OK...

Usa Foreign Patents Pending

3455 CONNER ST., BRONX, NX 10475 U.S.A. I . TELEX 125091 MINIMUM ORDER (25.00. SHIPPING CHARGE 2.00. N.Y. CITY AND STATE RESIDENTS ADD TAX ihf folio in* 1COM. Midland. Am-ccht, Denl ron, KLM. Swan, Drake Ten TeL Wilton. ST, MFJ. H> -Cain. Lunar. Nye Viking BAW. Nedi-kilo ait, CttthCnft, Moile> . Signal* Pspo. tit. lull Servi Siore i itnuii Klf irflnk , A62Jt Sitrr f ifliim ( 13J5. 822-7710. B.i'n ' ncvkevi Amateur ftadtouorc Jl used Amateur Radio sales & service. We feature Kcnvtr-od,...

Bidirectional

CASSETTE RECORDERS SPECIA BARGAIN SALE Every now and then we run into something unusuaf in our shopping for equipment In this case it was a particularly good buy on Sonex cassette recorders. We needed a bunch of recorders lor code tape duplication but in order to buy at a low price we had to take about 50 more than we needed You benefit These cassette recorders record and play both directions without stopping. You nmght expect to pay from 250 up for a recorder like this we 11 pass them alons at...

Hell Dxpeoition

W8TQE, the Adrian Amateur Radio Club, will give you a chance to work Heli, Michigan, between 1600 GMT August 25 and 1600 GMT August 26. The operating frequencies will be CW 3710, 3565, 7110, 14065T 21110, 21065 SSB-3900. 7235, 14285, 21360, 28625. A colorful QSL certificate can be obtained by accompanying your QSL with a legal-size SASE and mailing it to W8TQET PO Box 11V Adrian Ml 49221.

Pittsburgh Pa

The South Hills Brass Pounders and Modulators wifl hold its 42nd annual Pittsburgh Hamfest on August 5, 1979, from noon until dusk at the Allegheny County Community College south campus on Rte. 885, 2 miles south of the Allegheny County Airport and approximately 15 miles southeast of Pittsburgh, Pennsylvania, Advance registration is 1.50 2.00 at the door. There wifl be a large indoor air-conditioned area for vendors and the flea market, and a large paved surface for the outdoor flea market....

Remote Control

ib h li llfu*> ,l Ii* . t t HI Ii hl V , l ni Ul HU- HK41* l ll nhlHllll t MUIHtl hUlF li l*ll'l *rPTl * HlUflfl liifu aoublt-Hfled P.C. eiiard * TJirmt 1 o H) mln. yy.ifi set. with 1UI4 * uujrti iiyttil (puntiollea - Tn r-pi vr iDwiTCnfrt n or.E sJnglc c ejit, split IcurrhrdutilixnH i*r Qi seauiMiil llmiM)

The Auto Radiophone

THE j re eiii i au* ci fsdii 'clsphAivf ,, im, nL h i . . I i -I I . in IT, iir in ,IIIII .mi -iL'. Ii I i 1-1 LlK.nl r . I L- 1 11 l. l .I'.l.'i h. i i nr- i -ifJi il m i . . iruirtl .i X i i ., IjM In ., Oil i,ircrif .if I* UilW Lllllallit it'll tlnl n-J.T,-.- .I.ir Mill liiiravuu itf (In e*iTT> TiP icni-I I _ - 11 i ir J I Ml M -ill -- - I Iilii Ii , nln -- .r i i ir< - wh pnnfl+ jiic l ij I TIIi ll I lV1 T i .ii'.iij i. h i L i ' 11 - lad - -I. -. ji.l. wi-l. vanr ni -.r IJffl pl '...

Repeater

Now with three exciting new features Remotely selectable timeout limits IMAGINE A CONTROLLER SO VERSATILE It provides lour different classes of output Junctions in addition to autopatchand reverse a ulopatch, SO RESPONSIVE it *enda thirteen Morse codded messages to keep you fully informed. Messages like BZ If you try to access a busy autopatch line. SO ADVANCED It uses microprocessor technology and non-fatskig digital tone decoding. SO PERSONALIZED that many features are custom programmed to...

Only

Internally adjustable mic preamp a Hy-G'iin ncluifw Specially gaskeled case seals out water, dirt irid corrosive salt air Watertight* high-impact AGS ploslic case ribbed tor non-slip grip Top-mounted controls for instant access Low cost, 6-channel hand-held provides superb voice Iransmission over hoii to medium distances Sharply tuned art-fitquenCy selectivity In Itie RF amplifier stages plus FETs in I he Island 2nd miners tor virtual immunity lo om-of-band signals En term adulation distortion...

T Subscribers

H From lime to time 72 Magazine makes its subscriber lists available rto carefully-screened companies and organizations whose products, r services or informal ion may be o interest toyou, innwerycase, we must approve all organiiations wishing to mail to our subscribers In every case Ihey receive a list of names and addresses onty no other information we may have is divulged. Each organization may use the list only once and agrees never to make any personal or telephone solicitations from it The...

Barc Commemorative Station

The Bancroft Amateur Radio Club will be operating a special commemorative station, XJ3TBC, 24 hours a day during the centennial Homecoming WeektT of August 11 to 18 from the Centennial Headquarters. CW and phone operation on all HF bands excepl 160 meters, VHF on 146,52 simplex, and repeater VE3TBF on 147.24 .84, Special QSLs for working XJ3TBC on receipt of your log information. A certificate award is avahabie for working XJ3TBC on any three different bands on receipt of your log in* With...

Hal Buffalo Ny

New device opens up the world of Very Low Frequency radio. Gives reception of the 1750 meter band at 160-190 KHz where transmitters of one watt power can be operated without FCC license. Also covers the navigation radiobeacon band, standard frequency broadcasts, ship-to-shore communications, and the European low frequency broadcast band. The converter moves all these signals to the 80 meter amateur band where they can be tuned In on an ordinary shortwave receiver. The converter fs simple to...

Professionals

Power rated 2kW PEP, approx. 110-ft span Complete with wire - traps * end insulators 50 ft RG-8 U, PL-259 connector heavy duty cast aluminum and steatite center connector. CENTRAL NEW YORK'S F ASTEST GROWING HAM DEALER 4-Band(40thruWM), 55 ft model 370-13 also available, pre-assembled only. 10 Canal Street Bristol, PA 19007

Terminal Unit

Connect to your receiver speaker, transmitter microphone jack, and teletype machine and you're on the air. Ideal for HF and VHF auto solid state relay ** Stable audio frequency shift oscillator produces phase coherent sine wave tones ** TTL compatible inputs and outputs for auxiliary equipment ** High level output for scope tuning P.O. Box 976 Topeka, Ks. 66601 913 234-0198

Mfj Versa Tuner

New efficient wound cm I Tar mart witti ovt. Only Mf j u e& an etrtcienf m wound irmuci (13 popthWKi ii. ihis class of tuners to girt ywip more watts > Ltr ana less losses rhj'i ,i tapped tofcid Matches iwyMimhi trom ieo rhfu 10 M& iflrs dipoles. inverted vees. rjiniir> m *ires verti cai& . mobile whips teams balance line * Jines Up to 200 watts RF output 1 4 bHun lor balance laics Tim out it* S pP if our matte Irtsfn nudt yw tar Wn i fr r yt- compact ,f i6 rctei comei 5 *i) btndmg...

Rgq

Fan Kit, 1 15VAC Fan Kit, 30vaC Fdn Kit, 1 ISVAC Pen Kit. 230VAC 19 Inch Rack Adaptor 135*135*50fnm 135*1 35x50i vm i 381x140x89mrji 38 i K 140x89mm 48 3K 3X1 78m in 1 kg (2 2 lbs) 3 kg (2 2 IbS) 3.2 kq< 7 jbsj 3.2 kg i 7 lbs l kg< 2.2lbsi 5 kg 11 1 33 00 33.00 59.00 r> 9.00 5 25.00 1 .00 4 Used with the V360& V350 Amplifiers t ' + F of Exp on Or> iy Other Frequencies Available on Request 4 Used with the V360& V350 Amplifiers t ' + F of Exp on Or> iy Other Frequencies Available...

RL

Polarization proved superior on some occasions, while horizontal polarization would prove better on others While the problems encountered on 80 meters may not be thought of in the same light for the VHF frequencies, it is stilt useful insight, as the VHC antenna did first come from thinking of 60 meter antennas. The difference between the 80 meter and VHF philosophy is that, on 80, it is not the actual polarization that is important, but the angle of transmitted or recejved radiation. It is...

Tektronix

IL30 Spectrum Analyzer plug-in 925MHj 10 25GHz 5899 00 TYCO 10.7 MHz Monolithic Crystal Filter 35,95 HEWLETT PACKARD Modei 140A Oscilloscope W 1402A, 1400A 5495,00 HEWLETT PACKARD UHF, VHF, AND MICROWAVE SIGNAL GENERATORS AND SWEEPERS. AND OTHER EQUIPMENT MODEL 434A CaJorimetnc power meter 5450.00 MODEL 40QDR Vacuum tube voltmeter S 79.95 MODEL 606A 50 kHz to 65 MHz .1mV lo 3V into 50 ohms 51,000.00 MODEL 6168 A VS to 4.2 GHz only 5399-00

Led Watch Guts

II'M M li t I.LH jffAnl r nQund Duly juallty- ' nrijm , jlmh *tt Die J(W fimiildifcciion 2 rwinw. iO- .Ono Ht. i MK lie 50 FM II O Jupoi clip uhm Imp duncL 1.5 VUC Cat. HO-JTlJq G m Pr in l Flat Magnifying Lsn * It'e different L'.'u uituauai Hnjtnini lik n lam, y ut it+i flat1 A Tin if fliill ttiiuwnirii ifi vtj H wihd frorn. rb(i m thi die wf the lens, ectiiifi li gL& ut priant Each proo-v tH-nd* tb 1 If ht whviH tHm hit it. acting I Liu* cuit vn in tD p I E i M ft a lit, iiuipeneiv*, nnd...

Esq

AflflL Mam Radio Opereiing Guide Brush upon operating practices wdfc ns ri-'tterici-iource 'N iQQZ J.00 SaieNite Communicaiioni A package of maps jnd .if r'- tf . ftupLdinfffrg aftijieut > ate tes m-iludei floiTini ' OSCAR N 10064 60 meter DKing Handbook Con Lams 4 eclions ar pt< jp.Jigalior anlernas stahOn equipment and operating p ct- e* M' TiN j with lid ptacTmai otpenaoc 1 N 630 4.50 Tr Am irVr Radio Vertical Anienna Handbook The firil trao* rcj amaleur* K iyaboul ei'cai Ipr na is * it...

MM

1-75 MRF304 43.45 7.50 MRF502 .49 2-56 40282 11.90 32.20 40290 2.48 10.00 Motorola MC14410CP CMOS Tone Generator CMOS Tone Generator use 1W HZ cryslal to produce standard dual frequency dialing signal. Directly compatible with 12 key Ctiomeric Touch Tone Pads. Kil Includes the following And afl other parts for assembly NOW ONLY 15.70 95H90DC Prescaler divides by 10 to 350 MHZ. This krt will lake any 35MHZ Counter to 350 MHZ. Kit includes the following i Fairchild 95H90DC Chip 2 UG-eS U BNC...

AUG

The Hoga County Amateur Radio Club will hold its third annual hamfest on August 25, 1979, from 9 00 am to 5 00 pm at the Tioga County Fairgrounds. East of Mansfield, Pennsylvania, on Rte. 660, Va mile off US Rte. 6. Admission is 51.00 per person, with children under 16 admitted free. Featured will be an open-air and under cover flea market, dealers and traders, technical forums, ARRL news, FCC information, a stow scan demonstration by Fred WB2NAC, ladies1 and harmonics' activities, a craft...

Mfj S Ec Ono Keyer

Fand C nrreti Speed 9 to SO WPM . puit to tun , volume, on on. 3 CQodutiof V* men phone jack lo* kjytog cuiput nd itfly paddlo input Inter ml wthght control lets you adjust dot-flash space ratio tor a disincline tfgnal lo p& nelrats tJHM lor solid OX corriacis Skieiorit and ywaker Imtroai tone cwiirti Lunhc afttitiH witFi kty Dtf tfl& morv Instant stai St complete Jam rot spacing n+ixfit sart state ttyng gna taue* ca'hooe y*d ssitt WOT ncrs (- 300V, na ma and + 300V 100 ma ) For technical...

Quasar Video Tape Recorder Salei

* Records to two hours, color or btock 6 white * Record* off the air record one pogrom while watching another *CamefO input to make your own tape* * Con be used with optional timer while yoo ore out * Limited supply-these St.000 VTRs were demonstrators Cj come with new warrantee , . . d99 100 worth of new blank tape wili be included at no extra chorge Bill MC Visa _ Arnex I Credit card ____I EHRHORN TECHNOLOGICAL OPERATIONS INC PO. BOX 70S, CA ON CITY, CO BW2 1303) 275 1613

Xlq

5 WPM CT73G5 Thts is the beginning tape tof people ho do not Know the code at all It fakes them ihrough the 26 letters. 10 numbers and necessary punctuation, complete wiih practice every step of the way using the newest blitz teaching techniques. Il is almost miraculous In one hour many people including kids of ten are able to master the code,The eaaa of learning glvus confidence to beginners who might otherwise drop out. 10+ WPM CT73iO 73 hasn t loTQotten the Canadian hams our 10 WPM tape...

Output Range

R75A Kit for mon ior or -veather Satellite ser xe -60dS at 30 KHi. , 369 95 R75B Kil lor norma) ntilm service -60dB al 17KHz. -80dBat 25 KHz 74.95 R75C Kit for repeater service -6GdB at 14 KHz, -SOdBat 22 KHi 564.95 R75D KJt tor split channel operation Uses e pole crystaf filter -GfldB at t 9 KHz. -100dS 15 KHz,., 99.95 Specify bandM 0MP 0MH 2 M+of220 M H z. May a (so be u sed on adjacent commercial bands, Use 2M version for 137MHz WX satellite HAMTRONICS SIX CHANNEL VHF & UHF FM RECEIVERS...

Q

Switch SW2 defeats the automatic charge circuit by shorting the contacts of K1. Note that in this manual charge mode, indicator L3 still glows whenever charging is complete and the battery voltage is up to the setpoint level. SW2 also has another important practical function. When the TR-2200A is used for transmitting, the auto shutdown circuit tends to get falseiy triggered when the battery is close to the final setpoint voltage. This is due mostly to the sagging of the 17-volt supply during...

S

UHF (400 to 512 MHz) models, tower power and FCC type accepted models also available. UHF (400 to 512 MHz) models, tower power and FCC type accepted models also available. NEW TOLL FREE ORDER NUMBER (800 421 6631 CaM residents please call colleci on our regulat number* 11240 W Olympic Blvtf Los Angeles Calit 90064 213 477 6701 931 N Euclid Anaheim. Calif 92801 7iJ'772-92O0 Butler. Missouri 6473G B16 679+312 Pj-me subjeri 1 n chang* vw-iihriui notice Pj-me subjeri 1 n chang* vw-iihriui notice

A N Alog Output

Fig. 4, Block diagram of a 32-channel analog multiplexer using 16-channel multiplexer chips. A typical example is the 32-channel multiplexer circuit shown in Fig. 4. In this example, a Siliconix DG506 multiplexer is used. Note the use of the enable input at pin 18, This input allows us to switch be tween the two multiplexers by enabling one while disabling the other. With the aid of such an enable input and additional decoder circuits, such a multiplexer scheme can be expanded almost...

Abingdon Va

The 3rd- annual Bristol Hamfest w ll be held on Saturday, August 18, from 9 00 am to 5 00 pm, and on Sunday, August 19r 1979, from 9 00 am to 4 00 pm at the New Washington County Fairgrounds (behind the Rex shopping center), Rte. 11, Abingdon, Virginia. This will be an alMndoor event. Admission is S1.00 with an additional 2 00 for ftea market space (bring your own tables). Additional prize tickets may also be purchased. Featured will be ladies activities, children's games, and catered food....

Added Tdnc

R1 -470k. R2-220L R3-68k R4 W0k. Cl-2200pF. C2-AuF. IC-LM3900. Added CW filter mounted behind selectivity switch. Pencil points to the wire going to the sidetone control also shown is the added filter on vectorboard, New Equipment All new equipment an display is ap rrttLiiq for actual the iiir QSO's. We rt'dllv know our ypar Service Shop You'v prubablyheard t> iour fines ruieerep tation tiitirt CuihmariCL4B sijjiiiii gt> nerator H wlftt Pftckcird oscillo iiird...

All You Need In One

Show ihe shack, home rnovi , computer ftim *, etc. Connect to th ant terminals or any TV sel, add a Rood 430 antenna, a camera, and you are there Show ihe shack, home rnovi , computer ftim *, etc. Connect to th ant terminals or any TV sel, add a Rood 430 antenna, a camera, and you are there * TO Watts peak RF output Specify 434,0 or 439,25 MHz Subcarrier sound with plenty of mic gniiri ior distance pick-Up. * 8 MHz bandwidth, high resolution necessary ior computer alphanumeric* and cotor. *...

Amarillo Tx

The Panhandle Amateur Radio Club will hold its sixth annual Golden Spread Hamfest and Convention on Friday, Saturday, and Sunday, August 10-12, 1979, at The Inn of Amarillo, 601 Amariilo Bivd, West, Amarillo, Texas. The for* mat consists of two full days of exhibits and trading, six technical sessions, programs for the ladies, valuable door prizes, Army and Navy MARS meetings, ARES meeting, an ARRL forum, and plenty of free parking, Displays may be set up any time after 1 00 pm on Friday,...

Amid

Toroidal Cores, Shielding Beads, Shielded Coil Forms Ferrite Rods, Pot Cores, Baluns, Etc. 12033 OTSEGO STREET, NORTH HOLLYWOOD, CALIFORNIA 916Q7 SEPT* 14th-6 PM-9 PMSEPT. 15th 7AM-5PM Advance TICKETS 3.00 Outdoor Flea Market 1,00 Indoor FLEA 5.00 additional 9 30 PM Friday join our FLING ERIE COUNTY FAIRGROUNDS, HAMBURG, N.Y. Speakers Ladies' Programs Major manufacturers R.V. Hookups indoor Outdoor Flea Markets Talk-In on 51 & 3 1 91 off N.Y.S. 1-90 at Exit 5 7 DETAILS HAM-O-RAMA Committee....

And

V+ WAVE FOR CLOSE IN AND RESTRICTED HEIGHT AREAS STAINLESS STEEL SPRING AND W Hi P. CHROME ON BRASS BASE - COMPARE COMPLETE WITH 17' COAX AND CONNECTOR With Hinged Mounting Plate And House Bracket Cai PWR Scales 20GW-2000W Freq. fignge 3.5 ISO MHz. Please do not confuse the RF2000with similar appearing lower priced units. RF2000 is an individually calibrated professional quality instrument. Urequaled at many times the pr ice Size T 1 3 (d).

Benefits

The key to any sales pitch, whether it be for subscriptions to a magazine, to advertisers, to sell a product, or to convince the FCC to act the way we want, lies inthesimple concept of emphasizing the benefits and having a ready and simple answer to any objections. For instance, when our ad department talks with advertisers, we point out that our readers are spending an average of 500 each per year on ham gear according to our latest poll, tf you work that out, it comes to roughly 3.75 million...

C

Here is a close-up of the completed feedhom and supporting hardware. Note the plastic radome cover is in place. variable, Later, it was found that a small tubular type such as a Centralab 829-3 3-3 pF worked better Using a tunmg capacitor with an NPO temperature coefficient and metal film resistors reduces frequency drift due to temperature changes. Wire the remainder of the local oscillator as shown in Fig. 5fb). The local oscillator is mounted in a smalf box fashioned from a strip of...

Car Clock

A super htgfi perfotmante FM * re ess nr hekit Tran rs a siaUe igrraE up 10 300 yards wit* exc p- bonai a dki ty t r means ot Du dl m eiectrel imhe Krt mctudes case rr ne on-nH switch anl nr battery afld si> cer mstTLictiorrs Ttirs S tne finest unit ava labi FM-3 kit tlUS The UN-KIT. only fl 5 solder connections Heie d supe* ooiing rugged nci atturale j O Clock whiqn ts a snap to build and > nsiatl Clock movement Incompletely assemD-ed you Ortfy SGlder 3 wires and 2 seiches tawes jdouI 15...

Check The Features And Yul Know

25 W& ttTransmitter (Iw low power) rf Provisions for non-standard offsets ri 800 Channel Scanner Option available if Oniy 295.00 ( 395.00 with scanner option) complete with microphone, mobile mount, etc. Order yours today and Go with the leader. modify earlier nnjtiei FM-Z 1*. Can or wnte ror to a red ochtjie 1911 Olde Homestead Lane Greenfield Industrial Park East Lancaster, PA 17601 (717) 299-7221 Qp e- Servie*1 sc*1 ninjf

CI

Shown in Fig. 2, the indicating meter can be made to read the same value for a given amount of power whether it be at 3.5 MHz, 297 MHz, or at any frequency between these values. When this has been accomplished, the indicating meter may be calibrated in Watts and will provide satisfactory indication of transmitter output power at any frequency between 3.5 MHz and 29.7 MHz The basic difference between the indicator circuits shown in Fig. 1 and Fig. 2 is that the circuit shown in Fig. 2...

Ck

Interna crystal timebase accurate to ,01 h flu orescent readouts, full document tat ion (with automotive applications), si m pie assembly (just add 2 time set switches and 12V DC), and much more, Matching case with mounting hardware and optica filter 5.95. Hurry clock prices may never be this low again. 500 KHz. series mode, fundamental, wire leads. HC6 U package . , , J4-9T 4.45 1 MHz, otherwise same as above . , . ifi.JJT* L84320 MHzh otherwise same as above...

Cljp Of I

Fig. 5. (a) Bottom-view layout of local-oscillator circuit board, The shaded area indicates the area etched away. Use single-sided G10 epoxy circuit board, (b) Schematic dtagram of oca osctf ator. Ql is Motorola MRF901. RFC1, 2 is 13.5-cm (5 -inch) 26 AWC close-wound using a piece of 74 AWG as a mandrel. CI is a 1-7-pF fohnson-type U (see text). R1 and R2 are V4-W metal film-type resistors. C2 is a modified 270-pF feedthrough tsee fextjor other small low-inductance capacttor. This capacitor is...

Code Forever

I have listened to your voice so much on the 73 Novice code study tape that i feel like know you. I hope to finish up the Novice test next week and take the General in the next 30 days or so. Please let me thank you for the outstanding study material. The letter from Jack McCord KA4EXD published in the May, 1979. issue of 73 was most interesting made me stop and think a little. Here I am at age 42 working on a Novice ham license, looking forward to all of the possible new contacts and friends...

Code System Tapes

Code, sent at theottictai FCC atandard (no other ape we *ieard uses nese standards so rnany people flunk the code when they are suddenly under pressure faced with characters sent at t3 wptr and spaced for 5 wpmi This tape Es not memorable, unlike the zany 5 wpm tapeh since the code groups are enl irefy random characters sani in groups of five 20+ WPM CT7320 Code is what gets you wnen you go for ihe E*tra class license It Is so embarrassing to panic out just because you didn prepare yourself...

Collins Radio

75S3 Receiver With CW FILTER MP1 DC Power Supply KWM2 SN 10454 W 5I6F2 Tfanceivei ( > c. Cnnd.) 51612 AC Supply 75 A4 10-30 Meter Kecv. W 3 Mechanical Filler*. 7& S1 10 80 Meter Receiver 30L2 10-80 Meter Amp 10-HU Meier Receiver KWM-2 (r und) 10 80 Meier XCVK W S16F.2 - a OAvS iS MHZ KCVR - EitceHeni Condition

Complete Line Of Ode Antenna Rotor Systems

Comell-Dubilier Electric Corporation has released a new eight-page color brochure presenting their complete line of antenna rotor systems. Each of the six rotor systems is illustrated and described. They include the TaiJtwist-er , designed for king-sized antenna arrays of up to a 30 sg. ft. wind load area the new Ham IVTM. the latest version of the world-famous Ham series the new CD 45. incorporating professional features at a popular price the BIG TALKTM, with IC control that lets you...

Computer Center

MfNI MALL DOWNTOWN SHOPPING C NTER CAIRO, GEORGIA 3172B 912 377-7120 185-191 West Mann Street P O. Box 88 1 Amsterdam. NY 12010 Tel (518)842 8350 Just 5 minutes from N, Y. Thruway Exit 27 Brand name, first line Components. Stocked in depth. 24 hour delivery- Low prices and money back guarantee on all products we c j r r y _ STAMP BRINGS CATALOG

Contests

Scoring, but based on stations and messages copied. Logs must be received by October 10 and must contain band, date, time in GMT, call-sign. exchanges, points, and multipliers. Use a separate sheet for each band and enclose a summary sheet show* ing the scoring, classification, callsign, name, and address, and in the case of multi-operator stations, the names and callsigns ot all operators in* votved. Send logs to SARTG. Contest & Award Manager, C J. Jensen OZ2CJ Meisnersgade 5, 8900...

Corporation

H n Ivi'n'iH Fljhfl* TT iil imn runttVliWfi Bridge ilO AC POWEP r, up ply I rartW'v'BC pe I5P fl.trL> i -iDne W--JHUB ICJ Hd lilinn J w I HIH i I iW iC--, r.,.r i iiilffl i Al AS. l tliM e. Vd r DltJ I I -I I t-B 2CJL-- j'jji.1 iE.'' 110 vac ptMMvq ppLp HJ V IUA I iU' javiuppi c AmUwhur J4 lillrr inverter JiLXI lm iiifltoi Hi E Iii i-di VT . dj U' llj. MS liO-MI fW Filler friftf- fjmiik ' Fht FTicFU si Ml ilii nnp ijp i i

Crystals In Stock

Standard * Icom * Heathkit Ken Clegg Regency Wilson VHF And Qlhers Lifetime Guaranteed Now owl Ices FOB Medford, MA, Check Enclosed MA residents ado sales tax. ping and handling on ALL c ORDERS. Signature D Master Charge Q Send for Free Catalog PRICES SUBJECT TO CHANGE WITHOUT NOTICE _ Card axp, date_

Ct

Thr CT SO is a versatile and precision frequency county hich -ami measure frequencies ro 60 mH and up lo 600 rrrHi the CT-600 opbor Large Scab' ir gS Integration CMOS circuitry .md solid state dispfay technology nav enabled ihis tounie' To .omp nsai match performance lotind in selling for over three limes as much lo* power ti1ciu 1 ,rT consumption (typically 300-400 ma) makes the CT-50 ideal ior portable battery operation ct the CT-50 include large LED display PF shielded all imetdl rase easy r...

Current Limit

Fig. 2. interna 723 functional block diagram few parts. Read on and I'll show you how easy it is to custom design your own regulator around the 723 to suit your particular application. Before we begin, let's look at a few characteristics of the device itself. The 723 operates with a, rectified and filtered input voltage in the range of 9,5 volts to 40 volts. The output voltage is adjustable from 2 volts to 37 volts with .01 line and load regulation. In case the terms line regulation and load...

Dc

AflftL B MtoAmitauf Handbook Ne*ly re* .sed A jampjched wrtn frv fytrung from basics to d< weiopmeni5 IN lOOflt 9.75 ARRL Ra< WO Amatau I Llf H MinuaJ The uo lo Cale compilation of rule* i 'tCLj'afioni C -f * to ifa L- 'ass ARRL Antenna Handbook C mprete insfnjc-r> ir.s ror butldit> g anrenn * of 4ii typ N 10026 500 Aft FlL World Map I N 10099 3 50 VC F Cafc ul * lor SI 1de ru le ty pe cale uialor to com -pul Tuonan* frequency ele A great aLd1 I N 10062 3,00 Electronic Dala Bock All you...

Decatur Al

The North Alabama Ham Association wilt hold its annual hamfest on August 18-19, 1979, at the Calhoun Community College gym in Decatur, Alabama. Examinations will be administered by the FCC, door prizes will be given, and tickets may be purchased for other equipment drawings. Camping is available at nearby Point Mallard. Talk-in on 146.40 147,00, 146.34 94, or .52 ,52. For more information, write to the North Alabama Ham Association, Box 9, Decatur AL 35602, The Straits Area Radio Club will hold...

Drake

2C-Q Multiplier SPKK TR-6 6 MeieT XCVR W NB 1 4X 10-160 M ter Xml W AC-4 P.S SSK-1 Genera Cuvtra t Receiver AC-10 Power Supply R4C 10-160 Meter RCVH W MS-4 Spe akeT T4XC 10-160 Meter XMTR W AC-4 P S Supp Shure 444 Mike TH-33C 2 Meter Port. XCVR W Caseh Mike, Cord, Nkads, 12 Xtals 2B lO-SO Meter KCVR W Xials Calb

Dx

Watch 7007 and 21035 kHz from 2330Z. 601FG returned to Italy from Somalia on April 2 with far fewer contacts than were hoped for The political situation is still not settled enough for good DXing. He would have liked to have spent more time operating, but conditions just were not favorable. W2TDQ runs a twice weekly sked with SV9JI on Crete-Watch 14288 kHz on Tuesdays and Fridays from 2100Z, JA7JT JD1 left Ogasawara and set up shop on Marcus Island, He plans to stay through August when he will...

Equipment

How did that Gershwin tune go 'Summertime, and the RTTY is easy Well, the season is upon us and it s time to see what the mailperson brings. A1 Baketei K7ZMO of Ken-newick, Washington, sends along his RTTY transmitting program, which he combined with the receiving program published in iast year's RTTY Loop. A has submitted it to the LFD-400 User's Group for owners o1 6800 systems and Percom disks- and I am sure that users of compatible systems wilf appreciate his efforts. Victor Johnson, in...

Ew

A q( pifiOrmanCB in a little cpoce, nn EtQ 5 40 and meters Only ojfte sett my needed 1oi full bancj cover age- -law V5VUR through out Can be set n afty length irorn 24 40 in 30 75 meters 1 35 on 40. 5 13 on 20 Band chjhge itfke less than a minuii- pintiles 1000 walls CW. 2000 PEP on S5B Witn 50' HQ S8 U coj& ji S43 95 A q( pifiOrmanCB in a little cpoce, nn EtQ 5 40 and meters Only ojfte sett my needed 1oi full bancj cover age- -law V5VUR through out Can be set n afty length irorn 24 40 in 30...

Famous Hamtroncs Preamps

Let you hOcir the w sk ones too Great lor OSCAR SSB. FM. ATV Over 14.000 in use throughout the world on atj types of receivers. Deluxe vhf model tor applications where space permits tV1*3 * Models available to cover any 4 MHz band in the 26 1c 530 MHz range 1 2 Ydc 2 stages Ideal for OSCAR 20 dB gain Miniature vhf model tor t hl s paces-size only & x 2 H I Models available to cover any 4 MHz bend in the range 20 O 230 MHz 20 db gain i2Vdc I Cowers any 6 MHz band in UHF range ol 380 to 520...

Feet

L,D tnt < J 8' i 5 Ht LtS FCF F CONNECTCFiS F g. 6, Front and rear panel layout of the power supply tuning unit chassis. to permit access to tuning capacitor C1, and tack-solder the cover in place Permanent attachment is not done until checkout and tune-up are complete The combination power supply tuning unit is built into a 13.3-cm (5-inch) by 7,6-cm (3-inch) by 5.4-cm (2-1 8-inch) aluminum box. An LMB Tite-Fit chassis r, r.,. . rf _ ,' ' -,, ' drilled to accept mounting of the controls and...

First Name

2421 IF ( LEN(NJ * J < 2 > THEM GQTD 2432 IF LEN(N2 ) 17 ) 80TO iDQUP S030 24.14 CilTD 400 2435 SETER* 000 2440 IF iSOl) THEN CQTC 2145 LET N LEN f N111 2430 L T LENiN2tJ 2455 IF p L43 THEM LET Ni Nl**5t< 1 4-NI 2460 IF itt< 4J THEN LEI 4-iWl 2470 LET Kt Nl*yi 4)(1. 4 2400 PftTNT fl ('> o.i J.KEy 'i'4 TF (B 2> TNEH GUTD fiaoo

Free Trial Copy

Mail the order form today and we'll send you your first copy at absolutely nn obiigation . , . that's right, if you're not completely satisfied after you've read your first issue, just write Cancel on your invoice and send it back to us * . . the first issue is yours to keep on us In addition, we'll guarantee every issue of your subscription . , . if you're not satisfied with your first- or your eleventh issue, we 11 refund your money on all remaining issues. Mail the order form today and get...

Glass

Ga i n E qu vatcnt to Sf8 w a ve 2 eTf VSWfl Band Width Betler lhan 1 5 1 Chromaplaiedcasting Sta ilewStpei friardwajp S -we' fthiphoktef Height 33 Pert -rrr jii pntf Mf c lanK .si Patents Per.' nq Buy one from your nearest AVANTl dealer. If your dealer does not have one in stock, have him call the following toll free number and we will ship him one within 24 hours See Avanli's other new amateur mobile and base antennas Write for new catalog today, Senci 50 for handling aivl postage

Gold Plated Card Edge Connectors

25 pins 3.49 ea 10 30.00 30 pins 3.96 ea 10 32.00 50 pins 5.43 ea 10 S45.00 43 pins 3.66 ea 1 30.00 TCDfcflC. All material guaranteed tt for any reason you are not satisfied, our products maybe returned wit tun today s for a full refund ftess shipping . Please add S3 ERMS for shipping and handling on aif orders. Additional 5 charge for shipping any item over 5 tbs. COO s accepted tor orders totaling SSOOOor more Atl orders shipped UPS unless otherwise specified Florida residents please add 4...

Great Balloon Race

About ten years ago, the famed Fifth Dimension vocal group had a miltion-plus-selting record titled iJUp, UpT and Awayr It was a dream song it told of sailing freely through the air, free of the earthly bonds that shackle mankind to his oh-so-hum-drum existence. It was a song that any dreamer could relate to. It has stayed with me ever since There are balloons of one's dreams and then there are the real kindt the ones filled with helium or just hot air (no pun intended) that do indeed lift man...

Hdt Tripods

UPS Shippable. HDT-10KD 10 tripod, hvy duty 49.95 g HOT5 5 tripod, galvanized 24.95 f HDT-3 31 tripod, galvanized 15.95c 17.50 c . 8.95 c . 1.54 a . 3.46 b .4.35 b ST-SN Stainless chimney mt (pair) . PFM71 Hvy duty self sup roof mt 2791 Guy wire wood screw hooks (3) 2751 'thread x 7V turnbuckle (3) 2876 100r 8 alum ground wire 8.19c GND*4CP4 copper plated grnd rod. , . 3,39c S-1625P 2Vs ft. x 1 Vj mast 3.95 c A-125-5P 5 ft, x 1 i 4+t alum mast 11.50c WHEN...

Heavyduty Replacement Transformers

Morse radioteletype reader & speed display Kantronics Field Day morse code teletype reader reads code signals right off the air. Its powerful microcomputer system picks out signals, computes their speed and even reads sloppy copy up to 80 words per minute. The Field Day is simple to use. You plug it into your station receiver just as you would a set of headphones Code arid teletype conversations are converted from dots and dashes to standard alphanumerical text. The text advances from right...

High Pass I Filter

The filters must separate the tones (which are input at approximately equal amplitudes, remember) by at least 33 dB (38 dB in the first-run engineering prototype chips). 33 dB is a voltage ratio of 45 to 1. Roughly, if the high tone is 1 volt rms, the low tone on the high input must be less than 20 millivolts rms. The prefilter block diagram is shown in Fig. 2. The major filtering is done using active audio filters in a crossover filter. The crossover point was chosen at...

U It

RECTIFIED AND < FILTEREO INPUT (9 5V TO 40V 1 Fig. 4. Htgh-voltage regulator(7.1 V to 37 V . To select component values 7. Choose Vo 2. Measure Vr (or assume Vr 7A V) 3. R1 Vr lb (lb is between 0.1 mA and 5 mA) 6. Rsc 0.65 (Isc max< output current RECTIFIED AND < FILTEREO INPUT (9 5V TO 40V 1 Fig. 4. Htgh-voltage regulator(7.1 V to 37 V . To select component values 7. Choose Vo 2. Measure Vr (or assume Vr 7A V) 3. R1 Vr lb (lb is between 0.1 mA and 5 mA) 6. Rsc 0.65 (Isc max< output...

Wmj

TWOESBft * . f-7A v ' - i ,2 Q B --p - . - -1 r - - rt 1 r * . j I (il . . TWOESBft * . f-7A v ' - i ,2 Q hbi ' - . v. I 1 .- rs - - - - .- - ij , E V Vi - yj-.'JV.- i'i 7nif ' .L . - r J ' . .J-. Tfte Yaesu FT-2Q7R Synthesized Handle has all the features you could want in a very compact package 4 Memories plus Programmable Offset Priority Channel Tone Squelch, Speaker Mike, Nicads, Battery Charger Keyboard Encoded Frequency Entry 2 Tone (Touchtone ) Input from Keyboard Keyboard...

Ib

MISSISSIPPI STATE, MISSISSIPPI 39762 Ken Winters WB5UTJ N5AUX 5307 Marshfield Court Arlington TX 76016 Most amateur radio clubs produce some type of newsletter or bulletin on a more or less regular basis these are usually generated by the efforts of a few members who have the desire, time, and other necessary resources to produce, re produce, and distribute the club rag. Although some clubs simply hand out copies at each regular meeting, most of the larger, well- organized clubs maintain a...

Ic

Box ii31 Farminirdale NY 11737 II recorded, on a standard tape cassette, much of their operation. I even caught one net when they switched to high-speed CW. The cassette, along with a detailed log, was sent to the ARRL Intruder Watch 1 After a couple of months, with no reply, I sent a letter directly to Dick Baldwin asking if they had received the cassette Again, no reply. Finally, after a few more months, I asked Harry Dannals to check on this His verbal report...

In the Northwest

ATLAS ICOM KENWOOD YAESU Call 206-364 8300 to place your order. We will pay for call when order is shipped. 17550 15th Ave. N.E. Seattle WA 98155 (206) 364-8300 Other locations (Walk-in customers only) Betlevue 120G1 N E. 12th * Everett 4610 Evergreen Way Open Mon. thru Sat.

INC

925 Sherwood Drive Lake Bluff, II 6 044 YAESU FT227, ICOM HC22S, KENWOOD TR7400k AED m ru& In eipad ft line ni qualify icanrun. Alio the above scanners are tmlom designed fa itair respective iigi, All icftiners r tail c& npielcly inside the rig. No oblruivfc txrenial fonnedions. All art tajy la dssemblt and tome torn pi tie will) a detailed inilruttlM mariuaL Scanned Irequwcif delayed on digital readout ( pi EC22S , In fhe earner OFF m t Hie rig operates n-armdllv. In Ihi Kilter ON mode...

Dynamic Ram Chip

16K X 1 Bits. 16 Piri Package Same as Mostek 4116-4, 250 NS access. 410 NS cycle time Our best price yet for this state of the art RAM 32K and 64K RAM boards using this chip are readily available. These are newr fully guaranteed devices by a major mfg. very limited stock P.O. Box 401565 * GARLAND, TEXAS 75040 (214) 271-2461 TERMS Add 50 postage, we pay balance. Orders under J15 add 75c handling No C O D We accept Visa. MasterCharge. and American Express cards Te* Res. add 5 Ta*. Foreign orders...

Low Power Ram Kits Buss

Thousands of personal and business systems around the worid use this board with complete satisfaction. Puts 16K of software on line at ALL TIMES Kit features a top quality soldermasked and silk-screened PC board and first run parts and sockets. All parts (except 2708's) are included. Any number of EPROM locations may be disabled to avoid any memory conflicts. Fully buffered and has WAIT STATE capabilities, OUR 450NS 2708'S ARE 8.95 EA. WITH PURCHASE OF KIT

Static Ram Kits Buss

'*Ve fefll the 31will bo thone Kt industry s'andafO RAM chip the 2102 was This means price, ivai I ability aod quality uyJI all be gooiJ Ne*t rhr 2114 is FULLY STATIC1 We feel this is (heONLY A ay to go on the S-10G Bu& s We've all heard the HORROR stories abou< some Dynamic Ram Boards having trouble wilh DMA anrl FLOPPY DISC DRIVES Who needs these kinds of problems And Imally, evsn among other 4K Static HAM stheSil 14 stands ouv Not ail 4K static Rams art created equal' Some of the otfi r...

Static Ram Ss Buss

Addressable on 16K Boundaries 4. Double sided PC Board, Solder mask and silk screened layout. Gold fingers. 5. Afl Parts and Sockets included 6. Low Power Under 2 Amps Typical BLANK PC BOARD 33 COMPLETE SOCKET SET 12 TM990 BUSS PROTOTYPE & WIREWRAP BOARD For use with the Texas Instrument Series of 16 Bit Microcomputer Modules. Fully buss compatibie. An inexpensive and quick way to expand the capacity of your Tl computer, Made of G-10 Epoxy PC material. Gold plated contact...

Kantronics

VU> accept Visa, M tei CWcje, chuck and money orders AIM , VIM , (SYM) , KIM OWNERS (and any other KIM bus users) buy the best 8K board available anywhere GRAND OPENING SPECIAL-HDE 8K RAM-SI 69 3 for 465.00 100 hour hum in low power commercial industrial quality 90 day parts and labor warranty (reg. 195,001) KIM i Compute* j 179.00 KIM* Motherboards ill5.QiL Also cum your KIMTW or relmlvt) into the besi 6502 development system available at any price. Evparvd...

Keyboard Enclosures

20 IK J 20,73 Blue base specify white or black lop P,0+ Box 426 Fpirburn, G A 30213 Phone (404964-3 764 Full ASCII Protauloiul Keyboard Kit, Mode 75 Mortel 701 Plast irtclosufe Moi+el 707 Sl i Intlo ure lMT GI ATtD CIRCUITS Full ASCII Protauloiul Keyboard Kit, Mode 75 Mortel 701 Plast irtclosufe Moi+el 707 Sl i Intlo ure lMT GI ATtD CIRCUITS CA 3 I 40 Op Amp C A3240 Du.il Op Amp uAbSib iimt1 SOCKETS R pin Low ir o ilt I 4 pin Low pr oi iip f 6 pm Low prof iIf T r l1 m I si ojf Sotlrt

Led Clock

Panel or case det gn 3 PC Mt i Kn con giato oT S pc wt ira n ifonn , t unction lwlti hjh4n'l-1ninL und a National MA101 -1I2A dijil& L clock module with all porta and LC chip mounted nr. Dh i I a i JU pc bo H The BED Hltenvi module meaHUJ-ea 3 i 3 4 l 3 1 ft. The PC roard-module is mounted Ln a bake Lit* frame 3 7 & s 1 3.r 4 i L-'H with S rioir for eaav pane-E mounting. ' W'vt (fihlWl ,

Levelland Tx

The Hockley County Amateur Radio Club and the Northwest Texas Emergency Net will sponsor their 14th annual picnic and swapfest on Sunday, August 5,1979, at the City Park, Leveliand, Texas. A 2.00 registration Is requested but not required. Registration begins at 8 00 am and lunch will begin at 12 30 pm with a bring-your-own-picnic-basket lunch. There will be swapping all day with tables provided. Talk-In on 146.28 .88. The Black River Amateur Radio Club will sponsor its 26th annual VHF Picnic...

Little Rock Ar

Emergency Net (CAREN) Amateur Radio Club will hold its second annual Ham-a-Rama on Saturday and Sunday, August 4-5,1979, at the Arkansas State Fairgrounds, Little Rock, Arkansas. There will be two main prizes given, as well as door prizes. Featured will be forums, dealers' exhibits, a Saturday night party, and a large flea market. Talk-in on 146,34 .94. For details. send an SASE to Morris Middleton AD5M, 19 Elm-herst Drive, Little Rock AR 72209.

Model

N Connectors UHF on Special Order Shipped From Our Stock Just 295 Complete AH M 0, & Cert Check orders shipped next day cm Res Addh i ROSS DISTRIBUTING CORP. * (213) 919-3446 P.O. BOX 5003 * COVINA, CA 91723 To order send your check, mone, order. Master Charge or Visa number along with card expiration date to Codemaster Specify number and quantity of tapes desired Tapes are 57.95 each, two for 14k and three for 19. Also specify T reel or cassette. We'll send your tapes post patd by fourth...

Mosfet

Fig, 3, Schemaiic diagram of i-f amplifier and mixer sections of the MDS downconverter. D1 and D2 are H-P5082-2835, or the best microwave mixer diodes you can afford. Q l and Q2 are Toshiba 3SK35 dual-gate MOSFFTs others , such as RCA 40673, work well. RFC1 is Ohmite Z50 or Miller RFC-50 (see power supply RFCl). U and L2 are shown in detail in Fig. 1. L3 4 turns 28 AWG 3-cm (1 8-inch) diameter. L4 15 turns ft32 AWC .16-cm (1 16-inch) diameter ( 085 uHl L5 11 turns 22 AWC 56-cm (7 32-inch)...