Skyclaw

A tumblo monoband high perfornian vertical antenna, designed for 40, 80, 160 melir operarion. SKYCLAW g-iuei you iho following iseelrum coverage BAND BANDWIDTH IMiren (kHz 80 200 40 entire band Tun*ft 1 wV and reliable. Rugged con-11 ruction auurn that this ssH-supporting unit it weatherproof ind survives niiily in 100 mph winds Hand 1 full (ejel poMi limit. The antenna your neighbors will lov< . Th rvw DiiiTrqn Tfim-Tenna with 20 mater beam is for the diicnmirtabng amateur who wants...

Ohio Scientific Instrument

H 11679 HAYDEN STREET, HIRAM, OH 44234 Robert Baker WB2GFE 15 Windsor Dr. Atco NJ 08004 Why settle for eight bits If you're thinking of building your own microcomputer, take a quick look at what's available before plunging in. For slightly more than what you would expect to pay for an 80-bit CPU chip, you can now get a 12- or 16-bit microprocessor with many more capabilities and features. Those currently available include the 12-bit CMOS chip from Intersil (IM-6100) and Harris...

Info

STANDARD ROM MONITOR (Motorola MC 6830L7) Always the best value in hardware and now an outstanding selection of software too. What more could you want in a computer system For less than four hundred dollars you get everything you need ready to connect to a terminal and go to work. No surprises no funny business, just good reliable hardware in a very practical system that may be expanded to meet almost any later need. Memory and interfaces are not extra cost items in our system. A standard...

Tempo

The same fine specs and features as the 6N2, but for 2 meter operation only. 745.00 TEMPO 2006 Like the 2002. but for 6 meter operation. 795.00 TEMPO VHF UHF AMPLIFIERS Solid state power amplifiers for use in most land mobile applications. Increases the range, clarity, reliability and speed of two-way communications. FCC type accepted also. Drive Output Mode Power Power Price Model LOW BAND VHF AMPLIFIERS (35 to 75 MHz) Tempo 100C30 30W 100W 159. I Tempo 100C10 Tempo 100C02 2W 100W 179. HIGH...

Novice Class Study Guide

With the publication of the new Amateur Radio Novice Class Study Guide, 73 has again been able to maintain its lead in the amateur training field by keeping the content of its materials for prospective hams well ahead of the rest of the market. The new guide is the most up-to-date aid available to all those seeking a ham ticket. Right from the very beginning the materials are presented in a clear concise manner, making the complete understanding of Novice theory and the FCC rules and...

Thomson-csf Npc Electronics Inverter Model 12-115

Solid State. Overload Protected. Functions silently in convening 115 volts AC to 12-voits DC. 2,5 amps continuous. 4 amps max Enables anyone to enjoy CB radio, car 8-track cartridge, cassette tape player or car radio ja a home or offtce. Continucus Current (Full Load) 2.5 Amp Output Voltage (No Load) 16 v max Output Voltage (Full Load) 12 V mir Short Ci cu'1 Protector Thermal Breaker Case 3 (H) x 4 V (W) X 5 r ID). Sh-ppng Wergn 4 lbs. Output Voltage No...

Transmitters

TX432B Kit. . transmitter exciter 432 MHz . . 39.95 TX432B W T . same as above factory wired TX150 Kit . . 300 milliwatt, complete 2 meter transmitter. less crystal and mike 19.95 PA2501H Kit. 2 meter power amp - kit 1 w in - 25 w out with soiid state switching, case, connectors 59.95 PA2501H W T . same as above factory wired PA4010H Kit. 2 meter power amp - lOw in - 40w out - relay switching . . . 59.9S PA4010H W T . same as above factory wired PA144 15 Kit . 2 meter power amp - iw in 15w out...

The Icom S

Cries of the computers are coming, the computers are coming will be heard, as more hams get their hands on the new IC-22S. This is, essentially, the best parts of the old lC-22 (which was a'darned good rig) plus a synthesizer a programmable synthesizer. Up to 22 channels can be set up in the IC 22S by soldering in diodes on a matrix board. This is very handy if you are going from one area to another and want to change the channels so that you don't break any wires going to the matrix or break...

Other Products By Vhf Engineering

CD1 Kit . 10 channel receive xtaI deck CD2 Kit . 10 channel xmit deck w switch and trimmers -, 14.95 CD-3 Kit . . UHF version of CD-I deck, needed for 432 multi-channel operations . 12.95 COR2K.it complete COR with 3 second and SC3 Kit . 10 channel auto-scan adapter Crystals . . we stock most repeater and simplex pairs from 146.0-147.0 (each) 5.00 CWlDKit , 159 bit, field programmable, code identifier with built-in squelch tail CW1D . wired and tested, not programmed 54.95 CWID . . . wired and...

Muleshoer

Since CB radio has become so popular, many of my customers have gotten rid of their telephones and gone exclusively to the CB radio in order to communicate with their friends. That was the reason I got CB for my truck I can't confirm appointments by carrier pigeon or smoke signal. And Wayne is right. it's darned handy. I have found another side benefit of it. I'll teil it by the example of last Saturday night I was shoeing horses in the Milwaukee area al day Saturday. It was 9 30 or 10 00 pm...

Sl1612 Receiver

Low noise, low distortion, amplifiers with integral supply line decoupling and AGC, SL1610 has vottace gain of 10 and bandwidth of 140MHz SL1610 . 2.03 Accepts signals from a low-sensitivity microphone providing an essentially constant output signal for a 60 dB range of input. Constant gain amplifier provides an amplitude-limited output for sidetone in mobile transmitter receiver applications. 10 lead TO-5 operates from a 6 to 12 volt supply, produces an independent supply line at 4.7 voits...

Jum Led Car Clq Ck

Vou requested iti Our first DC operated clock kit. Professionally engineered from scratch to be a DC operated clock. Not a makeshift kluge as sold by others. Features Bowmar 4 digit .5 inch LED array, Mostek 50252 super clock chip, on board precisian time base, 12 or 24 hour real time format, perfect for cars, boats, vans, etc. Kit contains PC Board and all other parts needed (except case). 50,000 satisfied clock kit customers cannot be wrong FOR ALARM OPTION ADD 1.50 FOR XFMR FOR AC OPERATION...

Variable Power Supply

Continuously Variable from 2V to over 15V Typical Regulation of 0.1 Electronic Current Limiting at 300mA Very Low Output Ripple Fiberglass PC Board Mounts All Components Assemble in about One Hour Makes a Great Bench or Lab Power Supply Includes All Components except Case and Meters LOGIC PROBE KIT-Uit wi h CMOS, TTL. DTL, RTL. H7L. HiNIL > i> d mosc MOS IC's Built-in protection a-gaipjt polaritV rwso' IXl ower , Qriwwonty a ifA EfOm orchil If last. Dbal LED readout. Complste kit includes...

Optiscan

150-170 or 140-160 MHz 450-470 MHz 490-510 MHz CE's Price - S296.95 Toll free U.S.A. 24 how order & information line 800-521-4414. Outside U.S.A. & Michigan 24 hour phone 313-994-4441. Certified check or charge card on mail orders for immediate shipment. Dealer inquiries invited. Michigan residents add tax. Foreign orders invited. Call toll free or write for your free complete catalog & specifications. Satisfaction guaranteed or your money back. For engineering advice, call after 6 00...

Antennas

A-FM niNCO 3-75 dB Cain (rcfcrcncc wave v Ji j> j, Half wave length mi-teiuifu wiLh direct dc ground. 52 ohm feed takes FL-2S9. low angle of mdm-tioH wJth. l-l gWH. Pwttry prpa- einBled and ready lo install. 6 rnttcr partly prci.vwmbled. all fcisl -5 0 MHz Iske 1V must. There Me more Stingos la use Lh.u nil ether FM aatenrwi co.-nblned Model NumS r AR-2 AP.-25 AR-6 AP.-220 AR-iM Frequency MH 35-175 155-175 53-ii 22C-225 -4iOH60 Power -Mfflg Watts 1 500 100 ISO Willd are-i. Sq. ft _2j' 2V ST...

Exclusive Deluxe Sband Mobile Antenna

All band manual switching antenna for 10. 15. 20. 40 and 75 meters. Power rated at 1000 Waits P.K.P. Includes base section with mobiiecoil and six loot whip top section.45 Antenna 114.95 available for you fully assembled and tuned UPGRADE YOUR REPEATER WITH A RF TECHNOLOGY DUPLEXER. ALL DUPLEXERS AND CAVITIES ARE TEMPERATURE COMPENSATED WITH INVAR AND MEET ALL COMMERCIAL STANDARDS ONLY TOP QUALITY MATERIALS GO INTO OUR PRODUCTS. BOTH KITS & ASSEMBLED DUPLEXERS AND CAVITIES ARE AVAILABLE TO...

Icom

13256 Northrup Way Bellevue, Wash. 98005 (206) 747-9020 3331 Towerwood Drive Dallas, Texas 75234 (214) 620-2780 - - do-it-yourself 7 8 coax connectors Kenneth R. Leiser W9DOR 364 Normandy Lane Grayslake IL 60030 Measurement of output power at the transmitter, in comparison to output power at the antenna end of a transmission line, will show how much power is lost in the transmission line. You may be shocked at how high this loss really is, especially if you are using conventional coax for your...

Altair

W Altair, from Mits, is the number riaqge in microcomputers for home, business, personal arid industrial applications. Because the Altair was first, it has set the standard in the industry. More Altair 8800's are now operational than all other microcomputers combined. Whether you buy a 395 complete computer kit* or a multi-disk system for under 1 * 0 Mits will provide yini with thorough and lasting support. Satisfied Altair users include schools, corporations, small businesses, students,...

Jyv

An easy-to-build 50mHz (6-djgit) Frequency Counter for a measly 25 Standard easy-to-find parts, too (Unlike other kits.) Any Radio Shack has them. Uses 7 segment LED readouts no scarce Nix e* tubes No tricky crystal ovens, eisherl Kit induces a classy cabinet with front panel, PC boards, hardware, instructions, and (iiagrams. A proven dggign An unbeatable offer Write or call today P.O. Box 357, Dept. 57, Provo, UT 816Q1 (001) 375-8566 6-DIGtT (50 m Hz K'it'i FREQUENCY COUNTERS WYOMING RANCH...

Ptt Line

1*1 V ON RECEIVE, 0 V ON TRANSMIT) Fig. 3. Simpler RIT circuits, (a) Shows circuit particularly suited to solid state transceiver, (b) Shows a crude but usable RIT. isolation so that the inactive voltage circuit does not interfere with the active one. Fig. 3b shows about as simple a RIT circuit as one can develop, but it does have disadvantages. The zero frequency offset position on the tuning potentiometer cannot be adjusted and the frequency offset will be non-linear as the tuning pot is...

Ground

Ward Lindsey WA4WOC 1580 S.E. 32nd St. Gainesville FL 32601 demand for technicians to install and repair Citizens Band radios has skyrocketed. With the expansion to 40 channels expected to increase the number of units in use, It doesn't look like the supply of technicians will catch the demand in the near future. Your ham background may be alt you need to turn this shortage into a lucrative part-time venture. With the determination not to offer your services free of charge, you can support your...

Johnson Single Section V

160-102 1.5-5 pF S3.00 GROUNDED-GRID FILAMENT CHOKES 160-104 1.8-8 pF 3.05 B& W FC15A dual winding 1 5 A 24.50 160-107 2.3-14 pF 3.15 B& W FC30A twin dual winding 30 A 29.00 160 110 2.7-19 pF 3.20 R-F PLATE CHOKES 160 130 3.0-32 pF 3.45 B& W 800 90 mH 2.5 kV 500 mA SS.75 BUTTERFLY National R175A 145 mH 3 kV 800 mA 10.60 160-203 1.5-3 pF 3.1 o We offer the identical product as the other house 160-208 2 2-8 pF 3 50 at about ONE HALF THE COST 160-211 2 7-10 pF 4 50 IRONPOWDER TOROIDAL...

S

1N9H lOOV lQmA Diode 1N4001 100V A Rect, 1N4154 30V 1N914 BP1 50V JSA Bridge Ree SN2222A NPN Transistor Ti SiS PNP Trarisistor 2NH0W power XiSt r 10A 2HSK4NPN Amp Sw f3l00 VI2D0B PNP Amp Sw 100 CP650 Power F ET ' Amp RF391 RF Power Amp Transistor 10-25W 3-30MHz TO-3 555X Timer 1 ji-1hr Different pi no ut front 555 (w data) RC4194TK Dual Tracking Regulator 0.2 to30V 200mA TO-6 RC4195TK Dual Tracking Relator 15V 100mA (TO-66) 8038 Waveform Generator flA Wave With Circuits & Oata TERMS NO...

Icom Introduces The Revolution In Vfo Technology

It& QHl I& 44B FMTItAMSCEtVE Introducing the IC-245,144-148 MHz FM Transceiver The VFO Revolution goes mobile with the unique, ICOM developed LSI synthesizer with 4 digit LED readout. The IC-245 offers the most for mobile on the market. The easy to use tuning knob moves accurately over 50 detent steps and assures excellent control as easily as steering the vehicle. With its optional adapter, the IC-245 puts you into all mode operation on 12V DC power with a compact dash-mounted...

Nye Viking Super Squeeze

Fast, comfortable, easy and fun Model SSK-3 has sub-base to hold any SPEED-X Key). Whether you're a brass pounder or a side swiper insist on the sure, smooth feel, and the long-lasting quality that is built into every NYE VIKING KEY. Prices subject to change. Available at leading dealers around the world or write for a descriptive catalog. 1614- 130th Ave. N.E., Bellevue, WA 98005 Let us know 8 weeks in advance so that you won't miss a single issue of 73 Magazine. Attach old label where...

Kints and Hinks

Have you ever been faced with the situation of wanting to rescale an old junk box meter to suit a particular application or project Most hams have a few old meters kicking around deep in the bowels of the junk box that could be easily rescaled to suit present needs or interests. I have found a relatively simple method of accomplishing this objective with a minimum of skill and artistic ability. The answer lies in the loca stationery store, or perhaps even as close as your secretary's desk. It...

Atlanta

The Computer Systems Center opened up specially for us on Sunday and we had an opportunity to rap for quite a long time without interruptions. Richard Stafford, Ron Roberts, Steve Mann and Jim Dunion are making good headway toward developing small business operating systems for use Dn microcomputers such as the Altair and the Intelligent Systems unit. They have programs developed for an accounting system (general ledger, invoicing, accounts receivable, accounts payable, payroll), a word...

Count Your Blessings

Thought you might like to know what amateur radio in Okinawa, Japan, is like. I can speak only Tor American hams who are servicemen and women stationed here, but our brothers and sisters in the states have 7HIS OFFER GOOD FROM NOV. I THRU DEC. 31, 76 Oscilloscope display of SSTV signal Rugged modular industrial grade Modular Construction Independent easy to use controls Use C1 camera with your home TV set Has both long distance and close-up features Adjustable frame size Built-in slo-scan bar...

M V V

Soriei. cootnanaer gndolane, general class iit.iriy (part 7 . soriei. cootnanaer gndolane, general class iit.iriy (part 7 . APR 71. Intro lo im, noise blanker, repeater problonis. Motorola HT mods, micfOwiivC peater linking, digital ID unit, tuneable 2M fin rx tx, repeater directory, fm marketplace, tieter evaluotot, varactor modulator, sim > lesig gon, touchtone hookup, hf preselector, 10M 12W tx. MAY 71. 75M mobile whip, 2M pr< wmp, transistor amp design, 1QM dsb tx, portable fm...

For These Radios

Clegg HT-146 Drake TR-22 Drake TR-33 rec only Drake TR-72 Genave Heathkjt HW-202I rec only Heathkit HW-202 Icom VHF Eng Ken Wilson Lafavette HA-146 Midland 13-5 05 Regency HR-2 Regency HR-212 Regency HR-2B Regency HR-312 Regency HR-2MS S.B.E. Sonar 1802-3-4, 3601 Standard 146 826 Standard Horizon Swajv. FM 2X Tempo FMH Trio Kenwood TR2200 Trio Kenwood TR7200 146.01T 6.61 R 6.04T 6.64 Ft 6.07T 6.67 Ft 6.10T 6.7 0 Ft 6.1 1 5T 6.71 5R 6.1 3T 6.7 3 R 6.1 45T 6.745 R 6.616T 6.7 6 R 6.1 75T 6.7 7 5 B...

Lovely Cover

Harry Goldman has managed to tell us a number of new facts about Tesia, which is quite a feat. Most of what we get is a capsule subluxation of H. Gernsback, who knew him best. Goldman's research and understanding make his article a landmark. I have been told, long ago, that TESS-la is not the proper pronunciation, that TESH la is. I don't know any Croatian, so I don't know this for sure. One thing I do know Tesia invented the roller coil tuning inductance. He shows it on a patent drawing...

Heathkit

The new Heathkit 2-meter frequency-synthesized transceiver. Prices amp specifications subject to change without notice Heath Company, Dept. 11-241 Benton Harbor, Michigan 43022 Eric Keener VJBQKZV 8587 Cray Street Arvada CO 80003 Last year, my wife gave me a Pocket-Scan for my birthday. This little receiver has proven to be a great monitor receiver on 2 meters. The only real drawback was that it required two 9 volt batteries, wired in After a while, it became rather expensive replacing these...

What Haye

The back issues of 73 are a gold mine of interesting articles . . . just take a look at what's been covered . every possible interest. This is the most important library you can have for hamming. The supply of these back issues is very limited ., . and when these are gone, that will be it. Don't miss out by procrastinating. Single issues 1.50 each before 1976 Ten back issues your choice 12 postpaid in US. Twenty-five back issues your choice 20 postpaid in US, Twenty-five back issues our choice...

Still Waiting

I just thought 3 would let you know that 73 is the best amateur radio magazine in the world Yes the world I've had them from all over Australia, U.K., Germany, U.S.A., Hong Kong. None comes close to 73. The mail from Peterborough is good, too. I got May's Issue in May, July's issue in July, and September's in September. I'm still waiting for June's issue of OST, and July's, and August's, etc. Keep up the good work, and you can put my name on the list for the next 3 years. Baden J. Melhuish...

Model Monobander Plus Db

The Wilson 204 is the best and most economical antenna of its type on the market. Four elements on a 26' boom plus a Gamma Match no balun required make for high performance on CW amp phone across the entire 20 meter band. The 204 Monobander is built rugged at the high stress points. Using taper swaged slotted tubing permits larger diameter tubing where it counts, for maximum strength with minimum wind loading. The DB33 is the newest addition to the Wilson line of antennas. Designed for the...

Tatus And Control Flags Register

PACE microprocessor functional block diagrarn. Instruments is a single 40 pin chip, 16-bit MOS LSI microprocessor that closely resembles a Digital Equipment PDP-11 in architecture see Fig. 3 . There are eight general purpose, 16-bit registers with R6 reserved as the stack pointer SP and R7 as the program counter PC just as in the PDP-11. Unlimited stack depth and self-identifying nested interrupt and subroutine capabilities are provided by the stack pointer in conjunction with external...

For Maximum Performance And Value

Cush Craft has created another first by making the world's most popular 2 meter antenna twice as good, The new Ringo Ranger is developed from the basic AK-2 with three half waves in phase and a one eighth wave matching stub. Ringo Ranger gives an extremely low angle of radiation for better signal coverage. It is tunable over a broad frequency range and perfectly matched to 52 ohm coax, ARX-2, 137-160 MHz, 4 lbs., 112 ARX-22G, 220-225 MHz, 3 lbs., 75 ARX-450, 435-450 MHz, 3 lbs., 39 Reference M...

Gold Chip

Brand new process by RCA in which the aluminum meta ligation has been replaced by gold. The chip is then hermetically sealed. Whot this means to you Is unprecedented reliability and uniformity, ptastic ports that meet mil specs 1 Tri-Tek Is proud to be the first to bring this new level of performance to yog at SURPLUS PRICES. Why buy regrades CA301 A. .Improved,genera I purpose op-amp,8 pin dip 59 CA307 .Super 741 op-amp. 8 pin dip ,. 52 CA324 .Compensated quod op-amp, 4 pin dip 3,80 CA339A Low...

Tempo N

The Tempo 6N2 brings the same high standards to the 6 meter and 2 meter bands. A pair of advanced design Eimac 8874 tubes provide 2,000 watts PEP input on SSB or 1,000 watts on FM or CW. The 6N2 is complete with self-contained solid state power supply, built-in blower and RF relative power indicator. 895.00 please call or write for comolete information, 11240 W. Olympic Blvd., Los Angeles, Calif. 90064 213 477-6701 931 N. Euclid, Anaheim, Calif. 92801 714 772-9200 Butler, Missouri 64730 816...

Schedule Change

Effective October 3, 1976, all GMT Sunday descending node southbound passes of AMSAT-OSCAR 6 have been considered as on passes. The transponder will be turned on by AMSAT telecommand stations whenever possible so these orbits can be used for two-way communications. The reason for adding these additional passes is because the satellite's orbit is such that AO-6 is in total sunlight according to NORAD tracking data. Our telemetry from AO-6 indicates that the temperature on board is still rising...

Power Amplifiers

PA 144 25 Kit . similar to PA144il5 kit except PA220 15 Kit . similar to PA 144 15 for 220 MHz 39.95 PA432 10 Kit. power amp - similar to PA144 15 except 1 Ow and 432 MHz . . . 49-95 PA 140 10 lOw in - 140w out - 2 meter amp - factory wired and tested . 79.95 PA 140 30 . 30w in - 140w out - 2 meter amp - factory wired and tested . 1S9.95 PS15C Kit .15 amp - 12 volt regulated power supply w case, w fold-back current limiting and overvoltage PS15CW T same as above - factory wired PS25C Kit 25 amp...

Inside the GLB

The use of synthesizers instead of crystals is getting to be quite popular by 2 meter operators. It makes good sense to use such a device for the serious operator, since in the long run it is much cheaper to have this gadget instead of a handful of crystals. In a busy area most 2 meter transceivers won't take all the crystals you want it to due to the limitation imposed by the channel switch. The GLB Channelizer has attracted considerable interest by many people. The firm runs a small ad in QST...

Editorial

That afternoon Sherry and I drove out lo visit her folks in nearby Seguin, Texas. I hadn't seen them but once since I'd visited them in Ft Worth back in 1949 while I was working at a television station in Dallas, so we had a great reunion . capped by a fantastic veal curry dinner my best curry recipe came from Sherry's mother Almal. Sherry's father, Snuffy Smythe, had worked with my father back in the early 40's, so we'd all known each other for almost 35 years. The next day we flew up to...

Dv

The perfect companion for your IC-21 or IC-21 A, the DV-21 is a unique digital synthesizer to complete your ICOM 2 meter station. The DV-21 will operate in 10 kHz steps over the entire 2 meter band, it can also scan frequencies being used. Completely separate selection of the transmit and receive is as simple as touching the keys. Release the mic switch, and the receive frequency is displayed. There are also two programmable memories for your favorite simplex-frequencies. You won't believe the...

Fax Machine By Datafax

Used for weather charts, hi speed teletype recording. Normally used over the phone lines. Operational when removed due to upgrading of equipment. Only a few on hand and sold AS IS. When used over the phone lines from weather data system, will draw full map of the US with cloud cover and also pressure gradients. Due to the weight of these machines they must be shipped via truck as they are around 60 lbs. Made for desk top use. Made by Steward Warner Elect....

Cs

Hy-Gain 9 model 2679 sells for 239.95 with Hy-Gain 426 AM FM CB antenna. Deduct 20.00 if you don't want antenna. The following Hy-Gain 23-channel radios can be remanu-factured to FCC 40-chanrtel specifications after January 1, 1977 and FCC type acceptance. 681, 682, 2680, 2681, 2682, 2683, 2679, 3084 If you currently own one of these radios, a 40-channel certificate may be obtained from your Hy-Gain dealer. introduces out-of-sight CB that's ready for 40 when you are Now Get the Hy-Gain CB...

Coaxial Switches And Accessories

For anienna selection and RF switch-rig Wiijn impMance ISO.OClO ohrm rryflklaf 4rluif gt lc Inc se youi transrn Iter's ffediw sppiiwiv up n-four iirrpj. Of uSi wi n vrt j gt i,w ecc d v ol D il adir sysiSiTi fw unjawed perf-jriit nM . Tim, wo -.' y. irsrtsistoriieu Audt PreamOliliSr linuHr un be uiiSJ v Iii all types of trgnimiticis. Powerija y a . - 5 issimp rli-, . lt 1 bsrcrv-TO exier ai If alls vLUhiui ai vy iv.'. r .mange in vOV i r irL-.' jul wv. fi gt Comp e -ap 'xis ee lt rjf ime'Ojrsw-...

Scott Communications Systems

Box 2117, Dept. 7, Stamford, Ct. 06906 or Call 203 357-1667 .ANNOUNCING Synthacoder 22 All New Synthesizer Encoder from Engineering Specialties. The Ultimate in Frequency Control for I COM 22-S Owners Front Pane Thumbwheel Control of All Channels Fully Automatic Invalid Code Control Small Size 33A x 1' ix6 Brushed and Anodized Aluminum Case Easy to Install Send check or Money Order To S2.00 Postage amp Handling. CA Res Add 6 Sales Tax. R. O. Box 2233 1Commercial Avenue Oxnard, California 93030...

Mrf237 Case Not Emitter

Remove amp short. 330k 100k .005 Remove. 2.2k Remove amp short. Remove amp see text. Add 100 Ohms in series, see text. Add a 10 Ohm resistor in parallel with each 3.3 Ohm resistor. See photo. Remove amp short. .01 47 3.3k Remove 10k 3.3k Larry Macionski WA2AJQ 707 Willis Avenue Syracuse NY 13204 Magazine, Jerry Copeiand W8FJA wrote an article about increasing the power output of a TR-22. Since then, Peter Stark K20AW has written an article on revising previously printed...

SM

Nfr Hpti rn wraps kkhI U-b nd -quad i i su manca m o cor isdy ps kagr. T gt c HK -jQufld. Socially cnginesred d maoumtfe u iquc quad drjv.jiridftfi ite mirlii n y i I i-I' d i rtfli WI . gt i ' , R IlCirifl Hy uad Irasuru nclude a aluminium diamond eletrlertl sflfuClurt dtd ti-rnj' l ed lir-if UbM Simplify t.ne rouliruj. CycnlK - insulators break spniawi t itffltegir elcctr'.cal pointa gt Lli each dtffl fU rv duilUy reiofafied 'O pre ni Irtjfraciwp. .AJI Hy-Qajid deitofii ie IhO u'jyl ,- Irtk-J...

Surplus

Surplus Circuit The Perils and Pleasures of Surplus Shopping . . . Thompson 30 Mar Space Age Junque A PC Board Bonanza Government Surplus Is It All How to Use Surplus Tech Manuals K40RT 140 May Space Age Junque Simple Graphics Terminal using inexpensive surplus equipment K1MRK, Ciarcia 116 Sept Blowtorch Your Get on Six with 25 for a Connector You're Crazy W9DOR 56 Hoi Surplus Headset

Multiband Hyq Trap Doublets

Install Horizontally or as Inverted V Super-Strength Aluminum Clad Wire Weatherproof Center and End Insulators Installed horizontally or asan inverted V. Hy-CJ nn dimbk-U with Hy-Q ir.ips dliliviT true ha f waveli'njith perform a Tr-e un every drsi n frequency. Matchi-d traps, individual I - r gt r-Tuned for i-ach hand feature larHrdiflmeter cDilsthat an exceptionally favorable L C rat n jnd very hij lt h Q per forman f McchnmcaJly superior saljd iiiumintm trap rraisings provide maximum...

Rtty

ASCII to 8audotConverter RTTY Autocall the digital Build This Exciling New TVT Magic Fingers for A Versatile TTY Generator Code Converter Using P using a ASCII Baudot with a PROM A RTTY Computer Display like low frequencies for The First Computer-Controlled Ham Station WABVNP 82 Aug Build the Safari RTTY Terminal FSK with the Ridiculously Simple RTTY System W3KBM 70 Sept Sneaky Baudot-with an ASCII keyboard W3KBM 115 Sept Mechanical RTTY RTTY uP Flexibility Thirty Years of Ham RTTY . W2NSD 1...

Solar Cells

Designed for the space program, these are the highly efficient silicon high output cells. Used for powering equipment, charging batteries. Made by Ion Physics Corp. Each with spec sheet. Size .394 x .788 65 mA, .43 V 1.25 12 12.00 Size .788 x .738 125 mA, .43 V 1.60 12 15.00 ZENER 15V 63 Watt 1.00 2.5 Amp 1,000 piv Motorola 1N4001 diode 1A, 50 piv 20 1.00 RT 70 GRC as written up in 73 Magazine, November, 1976. Only 20.00.

Precision Reference

LH0070-1H provides a precise 10.0 volts for use in BCD A to D converters or meter caiibrators. Typical initial accuracy is .3 t ,03V , Comes in TO-5 can. LH0070- H with specs 5.35 4 DIGIT COUNTER, MM74C926 is a 4 digit counter with 7 segment output. Carry output for cascading and internal display select allows outputting of counter or set of internal latches. 3 to 6Voperation. Great for clocks, event and frequency counters. MM74C926 - with spec sheet Si 2.00 3 DECADE flCD COUNTER CHIP...

Aldelco Semiconductor Supermarket

ALDELCO HOBBY COMPUTER CENTER Brand New GE Stereo Tape Amplifier Board with all components Watts 12 Vac Mono Amplifier Board 1 control 2.25 6 foot black zip cord and plug 35 RG174 100 foot TA round speaker, 8 Ohms 75 2 '' round speaker, 100 Ohms 1.J0 Speco miniature replacement speakers from 1 to 3 ', SASE for list. Speco weatherproof trompet speaker, 15 Watts, 5 horn, 8 Ohms, SPC Speco Ham amp CB extension speaker, 8 Ohms, 4 speaker, 10J cord,

Manual Override

This is really a simplified, method for cutting ammeter shunts. There are two things that will not happen. It will not be necessary to do any real deep math, and the meter will not get pinned during the cutting process. The voltage drop along a piece of wire is proportional to its length and the current through it. If a piece of heavy wire is hooked up as shown in Fig. 1, all of the sport is taken out of making meter shunts. A power supply, ammeter, resistor, and the bus bar that is about to...