The Plex

Without circuit closer. Standard finish only. Chromium f inished top parts, with VI BRO-KE YER Over the years, we have had many requests for Vibroplex parts to be used for construction of a keying mechanism for an electronic transmitting unit. This beautiful and most efficient Vibro Keyer is ideal for this job. FEATURES OF THE VI BROKE Y E R Beautiful beige colored base, size 31 s x 41At weight 2 pou nds Same large size contacts as furnished on Deluxe Vibroplex. Same main...

Ham Help

I am in need of schematic and conversion Info for an RCA LD Business Band radiotelephone, model CMCT-30B2-H, 159.60 MHz. Of course, I will pay any copying and postage costs. Thank you. Roger Mason KA4JHC 4308 Faigle Road Portsmouth VA 23703 I need a schematic and or instruction manual for a Collins 310B-1 Exciter. I will pay for these or I can reproduce and return them. I also need a complete set of knobs for a Hallicrafters S76 receiver. Herman F. Schnur K4CTG 115 Intercept Avenue North...

Info

WHY ARE ANTENNA MAKERS ANGRY ABOUT THE NEW AEA ISOPOLE For the first time, ham operators are finding out just how poorly designed most vertical, omnidirectional VHF antennas really are. AEA university level research has proven that most antennas now being offered create unwanted coupling of RF currents onto the antenna support structure and coaxial feed line shield from the transceiver, Proper design and decoupling on the new AEA ISOPOLE virtually eliminates the RF spillover problem and can...

Programmable Scanner

Call for LOWEST PRICES on Antennas and Towers 15 PRICES SUBJECT TO CHANGE AND AVAILABILITY WSA* 1840 O STREET LINCOLN, NEBRASKA 68508 losepb H. Co wen WA51UM P O. Box 764 Beevil e JX 78102 Editor's note If you plan to write a news tern or story tor 73, do as we do and not as this article says Ask us tor a copy ol our one page How To Write for 73. While we have edited this article according to our rules of style, the author's recommendations on style are not changed to conform with ours since he...

The Azden Pcs Meter Fm Transceiver

Last summer, Japan Piezo Company came out with their first product aimed at the US amateur, the Azden PCS-2000 2-meter FM radio. Now they are marketing a 10-meter FM transceiver using the same microcomputer design. If you have been holding back on 10-meter FM because you don't want to convert a CB radio or design your own unit, cheer up The PCS-2800 is specifically designed for this group of amateurs. It should help popularize this interesting band just as recent commercially-made equipment has...

Mfj

The new MFJ-722 Optimizer offers razor sharp, no-ring CW filtering with switch-selectable bandwidths (80, 10. 150, 180 Hz centered on 750 Hz), steep-skirtedSSB filtering, and a 300-3000 Hz tunable 70 dB notch fi lter. The 8-pole (4-stage) active IC filter gives CW performance no tunable filter can match. (80 Hz bandwidth gives 60 dB response one octave from center and up to 15 dB noise reduction). The 8-pole SSB audio bandwidth is optimized for reduced sideband...

Yaesu

FRG-7000 655.00 Digital Display Communications Receiver with CPU Digital Clock and Timer 0.25 Thru 29.9 MHz Coverage with 1kHz Readout Compute technology and con enience fea- 'jr i jre hrcug-u iocjerhsr ia r'.t- FRG-7C00. a J*rUi-diip4iy flefief wrnpcigfi' Hrceiy* for fit ditenrnmutifef ShL. Tbl digital dock ar iii r. i*i ro-l I by a CPU tOiiHn -'jcf* ( Lniii ch vm'i read ou wift loc.i and GMT ne, and will control penpheral station equipment such as a tape recorder, 0.5-29.9 MHz Coverage with...

The Heal Problem

The seeds of tne disaster presently Detailing the League go oaek many years. The odd situation is thai rt is the success of the League in drawing in newcomers mat has Jed to Somell me in the early days oi the League, n was decided that everything possible should be done lo prevent any other organization over getting a chance to gel started This would perpetuate a competition-Ires situation and allow the ARRL. io be a dictator in the field. In order to get anything serious going in opposition to...

Brochure Available

For further details on this exciting new high-power low-loss, easy-to-use tuner send for our new brochure. Or visit your Palomar Engineers dealer. Model PT-3000, 349.50. To order send 10.00 shipping handling. California residents add sales tax. Box A55. Escondido, CA 92025 + Phone 7141 747-3343 John Edwards WB2IBE 78-56 86th Street Glendale NY 11385 Tests have always played an important role in Amateur Radio, From pre-amateur status until we reach the exalted goal of an Extra-class license,...

Counter Preamp

W-ce banc preanps wrtb 20 to 30 oB gain Improves performance of iow price counters considerably. Probe reads oscillators without loading. Generators can be set to lower output avoiding Irequent shihs. Also for scopes, meteis. ets VaLuable troubleshooting td. Powered by 3 pence I Is. BNG conneciors Hi Z input. Output is 200 to 4QC mv rms into 50 or.ms. Model VP-2, VHF Counter Preamp. 100 KHz to 200 MHz S39.95 1 MHz to 500 MHz S54.9S Order rom PAGEL ELECTRONICS. 5742-C Tampa Ave Reseda. CA 91335....

Superex Headphones

Superex headphones - APS-N features high sensitivity, crisp clear speech clarity, and comfort oriented design. 29.95. The AVNS-7 noise shield headphones provide for improved communications by shutting out noises that interfere with reception - These comfortable headphones are designed with the purist in mind. S59.95. The APS-M3 comms headphone is a useful all around headphone, at home in the ham shack or out on field day. This rugged model is 34.95. Model 375 5 position pill box configuration...

Heyn And West

My husband Fried Heyn WA6WZO (Extraclass license) is running for ARRL SW Division Director in the October election, and Gordon West WB6NOA is running for Vice Director. Fried believes he and Mr. West have considerably more time to provide the Division with more leadership, more representation, more service, more ideas, more enthusiasm, more caring, and more courage, plus more qualifications and more experience in amateur radio. Fried is a math teacher 20 hours a week) having BA, BS, and MA...

Never Say Die

One of the main features of the Atlanta Hamfestival this year was a meeting of tne Ariiaieur Radio Manufacturer's Association (APIMA), The main subjesl of me meeting was a report of the results of my visit a lev cays earlier lo the ITU in Geneva, i went iher to find out what me feeling v as or tne amateurs at ihe TU as far as piospects for continuation of the amateur radio allocations which might result from WARC next year, U.S. amateurs seem to be optimistic. mostly as Ihe result of the report...

Dx Awards From Poland

Our fraternal friend Anton Kubicki SP5BB, awards manager for Polish Zwiazek Krotko-falowoow (PZK), the national amateur radio society in Poland, was kind enough to provide this editor with the complete details of their fabulous awards program. Allow me to share them with you now. For AC15Z, 23 or more confirmed contacts(or SWL reports) from the following list of countries are required UP2, UQ2, UR2. UA2, SP (4 districts), OK, OE (2 districts), HA. YU (3 districts), ZA, I, M1 (9A), IT. IS, FC....

Ground Radial

The GR-1 is the complete ground radial kit for the WV 1 A. It consists of 150' of 7 14 aluminum wire, heavy duty egg insulators and instructions. The GR-1 will increase the efficiency of the WV-1 by providing the correct counterpoise. BsndNIHz 14-21-28 Maximum power input---- Legal Limit Gain (dbd) 9db Impedance 50 ohm FiB Ratio 20 db Of Better Boom 10. D. x Length) 2x24'2 No. of Elements 6 Longest Element 28'2'A Turning Radius A8'6 Maximum Mast Diameter 2 Surface Area 8.6 sq. ft. Matching...

Corporation

1971 South Rllchey Street Santa Ana, CA 9Z705 (714) 835-0682 Ti t MorseMatic one of he f nest M rse heyers ever b t It lestuie something tor everyone Viether a beg iner.CWenthusiast,contestercrser iu VHFDX'er Functions as a memory keyer. Morse trainer be i or automatic s -al number sequencer Opiates nh ali popular pad es. Keys end b'rCK, cathode nr trar- iter circuits. Operates o't of externa 9 to 16 volts DC. MM-t MorseMatic Programmatic keyer 199.95 ME 1 2000 char, memory espansian MM 1 59.95...

Si

Synthesizer changes channels smoothly and settles out quite fast, so I feel that it works fine for me. It is most important to have this post filter in the circuit. This is where the majority of the undesirable components coming from the phase detector are finally removed. When the loop was locked and checked out, the design goals were reviewed. The following results were obtained. 1. I have not found any spurious responses in the receiver from 135 to 137.99 MHz. The synthesizer is heavily...

Vanguard Labs

Hoilis, NY 11423 Wanted Japanese Radio ftmateur Contact Magazine Peterborough, n.h.03458 603-924-3873 - *__ft ifr-- * - < u01> - PRETUNED - COMPLETELY ASSEMBLED - FOB ALL MAKES & MODELS OF AMATEUR ONLY ONE NEAT SMALL ANTENNA FOR J TRANSCEIVERS - TRANSMITTERS - UP TO 7 BANDS EXCELLENT FOR CON- If J GUARANTEED FOR 2000 WATTS SSB GESTED HOUSING AREAS - APARTMENTS i 1000 WATTS CW. INPUT FOR NOVICE AND LIGHT - STRONG - ALMOST INVISIBLE ALL CLASS AMATEURS COMPLETE AS SHOWN...

Hitachi Scopes

Single and dual trace, 15 and 30 MH2. All four high sen& ttivity Hitachi oscilloscopes1 are built to demanding Hiigebi quality stan dards and are backed by a 2-year warranty. They're able to -neasuT signals as low as lmWdiw S'On (with X5 vr'UCal rTagnifier lt.'i a specification you *i-- i't find on any other 15 or 30 MHr Plus Z-axis modulation, 'race rotation, front panel X-Y operation for all foa -low -ncdels. and X1C svjsep m gnification. id. both 30 MHz oscilloscopes offe iicir i isgnal...

Je

Desk-Top Enclosure for JE610 ASCII Encoded Keyboard Kit Compact desk-top enclosure Co of-coordinated designer's esse with light tan aluminum panels and molded end pieces in mocha brown. Includes mounting hardware. Size 3y 'H x 1dV4W x 8VO. SPECIAL JE610 DTE-AK PUKCHASED TOGETHER (Value 129.90) 124.95 19 KEY KEYBOARD 1 The JE600 Encode* Keyboard Kit i iipykii -lv psraie liait prrvtJCr' fi- m l*-r flf uiSri to a& ta d> r ei pic arwii u f BfcjiL mic usrMtuiK r ft-tjrt mpTTHjry racuiii. Tlws*...

Twist Antennas

A430-11 42 VMF UHF STACKING KIT5 S17-6& 29 BOOMER STACKING KtYS The full power, full performance 20-15-10m beam. Enjoy the thrill of working rare DX. increase the pleasure of your daily contacts with A3 interference reducing front-to-back ratio. Use your linear amplifier with confidence with our new high power traps. _

Dealer Pricing Upon Bequest We Can Put Any Type Of Connector On The Antenna Write For Price And Availability

a sightless sprinter's triumph is one of ham radio's finest hours Got to run faster. . . faster, Sheila thought to herself as she ran down the track. . . where is that 50- 50 now, she heard and put on some extra effort. 75 looks good was the next she heard then, Left, keep going, looks real good -THERE'S THE END You did real good At that moment. Sheila's friend Jennie grabbed her, and she knew for sure the race was over. Now came Photo A. Sheila during a practice session. Photo B. Ed Mulvin...

Hicksville Oh

The Defiance County Amateur Radio Club is sponsoring its 3rd annual hamfest on Sunday, November 2,1980, from 8 00 am until 4 00 pm at the Defiance County Fairgrounds at Hicksville OH. Tickets are 1.50 in advance and 2.00 at the gate. Table space is free on a first-come-first-served basis, inside or outside. Hourly drawings will be held, with the main event at I need conversion information on the T-20 ARC-5 command transmitter which covers 4 to 5.3 MHz. I would like to convert it to the 15-meter...

Directional RF Wattmeter

Dielectric wattmeters are your best choice for making accurate RF measurements. These rugged, dependable wattmeters can discriminate between forward and reflected power in all types of 50 ohm coaxial transmission lines and RG type cables. Have 5 full scale accuracy Have an easy-to-read 4V4 mirrored meter scale Feature a taut-band meter movement for longer life RF Elements available for all measurements The 1000-A from Dielectric you can't buy an easier reading, more accurate RF wattmeter. BASIC...

J

WA3AJR 4006 Win lee Road Randallstown MD 21133 Okay, now, how many of you out there have heard of iRL Come on, raise your hands. That's one, wo, three hmmm, not too many. I guess this goes along with what one o) the guys from the company told me. You see, they have a new RTTY demodulator, the FSK 1000, and, in his words, While we haven't expected the FSK 1000 to stun the free world and enrich us overnight, we still can't quite see why people would want to spend almost two...

Ncg Issb

Rig Pics Ham Radio 741

THE ORP RIG WITH THE BIG RIG SOUND ACTIVE NOISE BLANKER RF GAIN CW SWITCH SOUELCH MIC GAIN DIGITAL FREQUENCY DISPLAY HI LO POWER SWITCH-13.8 VDC 5A POSITIVE OR NEGATIVE GROUND. See your dealer for a demonstration. DEALER INQUIRY INVITED. THE ORP RIG WITH THE BIG RIG SOUND ACTIVE NOISE BLANKER RF GAIN CW SWITCH SOUELCH MIC GAIN DIGITAL FREQUENCY DISPLAY HI LO POWER SWITCH-13.8 VDC 5A POSITIVE OR NEGATIVE GROUND. See your dealer for a demonstration. DEALER INQUIRY INVITED. NEW 438 to 450 MHz PLL...

Mhz

Khz Switch

1QOOWATT 13 Different Models,SB pgs and 5. The purpose of the divide-by-ten prescaler is to lower the vco frequency a bit so that the programmable counter can function reliably. The output of the prescaler is 3.5 to 3.799 MHz, and this feeds the programmable ordivide-by-n counter. I used an MC12013P IC for the divide-by-ten circuit however, almost any prescaler IC will work. Looking at the circuit, transistor Q1 buffers and amplifies the vco output to a sufficient level to ensure proper...

Qsa Preamp

The QSA 5 pfsamp is a nigh performance, low noise p eamp (oi improving Ihe receiving sensitivity ol 2 Meter tiansceivers This preamp features easy installation with no modification to Ihe transceiver required This p eamp can be used wiiht virloally all 2 meter l< ar- . di> t*- > 1 on all mcties FM SSB CW or AM Fin1, , in tin HSA r. aufomatically Uypasfr the preamp when isrrvt n Hi> - -A LEI indicator snows the sla s ot ihe GF.-.l A . r. '.witch allows Ihe preamp to be bypawwt while...

Hf Power Meter Model Apmh

Frequency Coverage Input Impe.dance Power Range SWR Range Pomer Modes Accuracy 1.8-60 MHz 50 52 ohms 0 - 200, 1 000, 2000W 1 1 - 10 1 Average Si PEP 10 AUTOMATIC SWR & PEAK READING VHF POWER METER MODEL APM-1V Frequency Coverage Input Impedance Power Range SWR Range Power Modes Accuracy 1 1 - 10 1 Average & PEP 10 SWR & POWER METER FOR HF VHF MODE L PM-3HV 54.95 Frequency Coverage 3 150 MHz Input Impedance 50 52 ohms Power Range 0 - 20, 200, 1000W Power Requirements 12 VDC Illuminated...

Maia

I tt'ii ' - 4m jEi ftltieaS8Kti7icCilfllr i y r.i 'i.r. ccnliollBd ullrasan nn> assembled. 25 PROM capacity S37.50 (with timer 569.50) 6 PROM capacity OSHAi UL version 69.50 (with timer J94.SH 16 bit I O, 2 MHz clock, 2K RAM, ROM Breadboard space. Excellent for control. Bare Board S2B.50. Full KitjgS.OD. Monitor 20.00. Power Supply Kit 35.00. Tiny Oasic 30.00 8K Static Godbout Econo IIA Kit 145.00 16K Static Godbout Econo XIV Kit 285.00 24K Static Godbout Econo VIIA-24 Kit 435.00 32K Static...

To Qrm Killer

FtAf V W Of OPTi Off AL ftEC iV TvN R Fig. 7.1 This shows how the optional receive tuner is wired into the circuit to allow for automated transceive. When configured in this manner, the tuner optimizes selected radial dipole performance at receive frequency, but does not directly couple transmit rf. This allows you to use common receiver-type junk-box components for the tuner instead of having to worry about the power-handling capacities of individual components. FtAf V W Of OPTi Off AL ftEC iV...

Spillove

You maybe losing up to half the available output from your vertical gain antenna because of RF spillover. The amazing AEA Isopole with unique decoupling design, virtually eliminates RF spillover and can help you multiply your power in all directions on the horizon relative to an ideal ha f-wave dipole, or end-fed non-decoupied gain antennas. New Toll Free Order Number (800)421-6631 11240 W. Olympic Blvd., Los Angeles, Calif. 90064 213 477-6701 931 N. Euclid, Anaheim, Calif. 92801 714 772-9200...

Callbook

Here's an offer you can't reluse You receive three, information-packed. Amateur Callbook maps, folded, plus the World Atlas for only 3.75 plus 1.50 shipping and handling. If purchased separately, total value ol map atias offer would be 6.25, plus shipping. You save 2.50 and get these invaluable radio amateur aids 1. Prefix Map of the World, folded. World-wide prefixes. Shows 40-zone map on one side, 90-zone map on the other. Size 40 x 28 Map of North America, lolded. Includes Central America...

Jammer Loses License Department

In late 1978, there appeared on the Iwo-meter amateur band in Los Angeles a rather foul-mouthed individual using a phoney cailsign. Using the call W6JAM, this individual tormented the users of the then WR6ABN repeater for many months. During this time, many letters were sent to the FCC and other government agencies in an attempt to obtain some form of relief from this menace, but in the end it was his peers who located him. Unfortunately, W6JAM was found to be a licensed amateur operator named...

Foot Dish With Feed And Mount

PC BOARD WITH ALL PARTS FOR ASSEMBLY PLUS 2N6603 89.00 Receiver Kits add 1.50, Power Supply add 2.00, Antenna add 5.00, Option 1 2 add 3.00, For complete system add 7.50. Replacement Parts MRF901 5.00 MBD101 2.00 .001 chip caps 2.00 2N6603 12.00 PC Board only 25.00 with data 'INTRODUCING THE HOWARD COLEMAN TVRO CIRCUIT BOARDS (Satellite Receiver Boards) DUAL CONVERSION This board provides conversion from the 3.7-4.2 band t i rst to 900 M hz where gain and bandpass filtering are provided and,...

P T I

The sketch of the loop filter Fig. 9 shows that a value is to be found for C plus R1 and R2. The first thing I did was to determ ine the co of the loop in rad sec. First of all, it is necessary to consult a table of the second order loop step response. Knowing that the desired damping is 0.707, the time for the peak overshoot to settle out to 5 of its final value is at con t is equal to 4.5. The value for t is .5 seconds or the desired lock time. To determine the con of the loop, the formula is...

Six Meters Continued

Last month we began to discuss six meters, the deregulation that occurred during the summer, and a possible way in which the band might be developed. Since as this month's column is being written, last month's has not yet reached print, I cannot tell you of any feedback on what I put forth last month. Confusing Remember, there is a 60-day time lag from when I write until the time you read. To continue, one question most oiten asked of me is why the six-meter band is deserted. In many areas,...

South Fallsburg Ny

On November 7, 8, and 9, 1980, the Hudson Amateur Radio Council will sponsor the ARRL Hudson Division Convention to be held at the Pines Hotel, South Fallsburg NY. The theme is Good Times at the Pines, with emphasis on a minivacation type convention for both families and solo attendees. A full range of forums is planned along with an exhibit hall and flea market. Contact Mike Troy WA2TYV, 70 Ridge St., Rye NY 10580, for advance tickets at 5.00 each through 10 27 80. Contact Mike Evans WB2RDD...

Freedom Was The Gist

The main thrust of the testimony before the Commission was that amateurs should be free to invent, to experiment, and to be self-regufating. The example of the repeater councils was given to demonstrate rhat ama leurs are able to Set up their own sub-bands and even coordinate fre quencies for channelized operation. Good cases were made for relaxing the monitoring restrictions, trie subband frequency restrictions, theCroSs-band-ng restrictions, linking of re oeater restrictions, ten meter rep...

Bitbyter

Complete system includes BIT-BYTER interface AND the RTY-80 computer program. Great Features split screen, level 1 and 2 4K computers, transmit buffer and countless others . . . all at tills terrific price Order today. . . or tor more information write to Vic Frump. K8EXJ UHF SALES amp SERVICE COMPANY Rt. 1, Box 52A Evans. West Virginia 25241 361 304 372-2047 TRADEMARK of The Tandy Corporation H I WI 11 1 W I 11 VV Lawrence, Kansas 6604a r introducing the versatile Kantronics Mini-Reader At...

One Mans Magazine Twenty Years of

The author, first licensed in 1962 as KNIUOj, is a member of the 73 staff. This month marks an important anniversary for one of amateur radio's best-known and occasionally best-loved publications. Twenty years usually means an engraved watch and a thank you, or a platinum memento. In the magazine business, twenty years is a milestone and a definitive statement of success. Many magazines never grow that old. 73 Magazine is twenty years old this month. In the summer of 1960, Wayne Green W2NSD...

Instant Software

F 337 A trademark of Tandy Corporation Ed Ingber WAbAXX 108Tb Northridge Square Cupertino CA 95014 A Computer-Controlled Talking Repeater One of the most natural combinations of microcomputer technology and amateur radio is in repeater control. Using the real strengths of the computer to build in features not feasible without it is the challenge. But selecting the features that are truly useful for the average user is also part of the challenge. should be clean, pleasant to listen to, and be...

Cushcraft

AFtX-2 2-mtr Bingo Ranger A-3219 19-Element 2-mtr Boomer A-214B 14-Element 2-mtr Boomer A-214FB 14-Element 2-mtr FM Boomer A-228FB 28-Element 2-mtr FM Power Pack A-147-11 1 1 -Element 2-mtr FM Beam A-147-22 22-Eiement 2 mtr FM Power Pack ARX-450 450 MHz Ringo Ranger A 144-10T 1 O-Element 2-mtr Oscar ant. A 144-20T 20-Element 2 mtr Oscar ant. A-432 20T 20-Element 432 MHz Oscar ant. 219.35 84.95 89.95 32.95 74,95 56.95 56.95 179.95 32.95 95.95 32.95 39.95 56.95 49.95

July Dx Happenings

Guiseppe De Gasperin I2YDX operated three weeks from Somalia, signing 600DX, when time from his agricultural consultant duties permitted. Using iow power, a vertical, and fighting poor band conditions, he worked 20 and 15 meters on both SSB and CW, With 6O0DX still active as this is written, those west of the Mississippi River were doing their best, but many will probably go away without Somalia's arrow in their DXCC quivers, due primarily to the lousy band conditions. Those lucky enough to...

Wilson Systems Towers

Height 23' Weight 450 lbs. Winch 1200 fbs. Cable 4200 lbs. No Guys required when mounting against house. For completely freestanding installation, use RB-61B or FB-61B below., Max Height 45' Min. Height 22' Weight 250 lbs. Winch 1200 lbs. Cable 4200 lbs. No Guys required when mounting against eve of house. For completely freestanding installation, use i RB-45B or FB45B below. Max. Height 77' Min. Height 24' Weight 700 lbs. Winch 1500 lbs. Cable 6400 lbs. Requires RB-77B amp...

New Dvon From Hickok

New from the Hickok Electrical instrument Company is the latest in their LX series of hand-heid DVOMs. The new LX 304 features an easy-to-read, Vi-inch-high, 3Va-digit LCD display automatic polarity, zero, and overrange indication ' j-year battery life in typical use simplified one-hand operation and ultra-rugged construction with excellent overload characteristics for long-term reliability. Other features include an automatic d cima point, a built-in low battery indicator, diode and transistor...

Laboratories

MONARCH 10,15, 20 Meter Tri-Band Model TB5EM 4KWP A Telrex Balun fed Inverted-Vee kit is the ideal hi-performance inexpensive and practical to install low-frequency mono or multiple band, 52 ohm antenna system. Better than optimum full sized Dipole performance In an antenna which can be set up within the hour, needing a minimal support structure, existing tower, house tree etc. The Inverted-Vee produces a low-angle Balanced Omni-Directional pattern, which increases the signal to noise, and...

Drake

TR-7 DR-7 DIGITAL TRAN5CFIVFR H.MS 00 PS- POWER SUPPLY T8-WDA 7 DE LUXL 269 00 PS-75 power SUPPLY TR-7'DR-7 179.00 SP-7.5 SPEECH PROCESSOR TR-7JDR-7 149 00 SL- W0. 5L-5DO. SI-1800. 5l-iOOO. gt L 0On HL I h R 7077 DESK MIKE WfPlUC TR-7 46 00 AUX-7 RANGE PROGRAM00ARD FR-7 4200 MN 7 ANTJ NNA TUNER 2SOW, T6O-10M 15900 MN-I70Q ANTENNA TUNER 2KW1 lt jt gt 10M W CS-7 RiMOTF CONFROLIFD ANTI-NNA WH-7 WATTMEITifi. 2KW T 6-JO Mil . 8900 amp -1000BALIJN4 1MN-7.MN-270U 00 DL-300 DRY DIJWMY LCJAD 3DOW Hj'Ji...

Ihew S Different

Barker amp Williamson, Model 370-15, Broad Band Dipole Antenna with balun. Rugged construction for long life. Covers 3.5-30 MHz including the new 12,17 and 30 meter bands. Only 90feet long Can be used as a sloping or flat top antenna. Supplied completely assembled with high tensil strength steel copper clad wire, 50 ft. RG coax cable and Barker amp Williamson, Inc., 10 Canal Street, Bristol, Pa. 19007 D l during the computation process. The program allows the user to see these on the screen or...

Revere Ma

The 19-79 Repeater Association of Maiden MA will hold its first annual flea market on Sunday, October 19, 1980, from 11 00 am to 4 00 pm sellers will be admitted at 10 00 am at the Beachmont VFW Post, 150 Bennington Street, Revere MA. Admission is 1.00. Sellers' tables are 5.00 in advance and 7.50 at the door, if available. Talk-in on .19 .79 and .52. For table reservations, send a check to 19-79 Repeater Association, PO Box 221, Maiden MA 02148. The 26th annual VHF Conference will be held on...

Oscillateur 1 Mhz A Nand

At lower voltages down to 2.5 volts dc , the frequency will be lower this is a general rule of thumb. Additional formulas for different operating conditions are given in the Motorola data sheet for the device. We also can crystal-control the MC4024, but the frequency range is narrower. The frequency of the crystal must be between 1 MHz and 25 MHz. In practice, if the frequency is less than 2 MHz it is best to parallel a small capacitor with the crystal. Many...

Microlog

Innovators in Digital Communications the transverter approach to fast-scan television Photo A. The standard MMT 432 28 transverter, manufactured by Microwave Modules or Great Britain. All inputs and outputs are available along one side of the rugged cast-aluminum enclosure. The 432-MHz output is on the left, followed by the 432 input port. This is normally not connected, but you can jumper the receive-converter input to the connector when using an externa linear. The DIN power and control...

National Semiconductor

JUMBO CLOCK MODULE Bright 4 digit 0.7 LED Display Complete-Add only Translormer and Switches VECO PRECISION THERMISTOR. GLASS TYPE VECO 41A72 S2K OHMS AT ROOM TEMP VERY SENSITIVE INDIVIDUALLY PACKAGED IM PLASTIC VIALS S3.00 VALUE 1.00 each or 3 FOR 2.50 lt _ TERMS Add 50 postage, we pay balance. Orders under 15 add .' J 75 handling No C.O.D. We accept Visa. MasterCharge and American Express cards. Tex. Res. add 5 Tax Foreign orders exceptCanada add20 P amp H.9 Day Mor.ey...

The QRM Killer

Like many people, I have a special problem. While I dearly love amateur radio, my actual operating time is quite limited. Having a busy young family with varied interests, I find that it is usually quite late in the evening by the time things settle down. My job demands that 1 rise no later than 6 00 am during the workweek, so any hamming I do usually occurs somewhere between 9 30 and 11 00 pm. I should add that this is further complicated by the fact that I have come to enjoy 40-meter phone...

Sstv

Sstv Test Chart

Any Four Tapes For 15.95 4.95 Each 20 WPM CT7320 Code is what gets you when you go for the Extra class license. It is so embarrassing to panic out just because you didn't prepare yourself with this tape. Though this Is only one word faster, the code groups are so difficult that you'll almost tall asleep copying the FCC stuff by comparison. Users report thai they can't believe how easy 20 per really Is with this fantastic one hour tape. 13 WPM CT7313 Code groups again, at a brisk 13 per so you...

Vhf 10hz Resolution Counter

CALL TOLL FREE 1-8 lt gt - 38-4486 The JD'I 170 Universal Data Transceiver will Instantly convert any ASCII or Baudot teletype or video terminal into a multiple baud rate data transceiver for ASCII, Baudot or Morse operation. It features Dual 6 pole active filters for weak signal operation ASCII Baudot Regeneration with multiple baud rates 1-150 WPM Morse with Auto-track Price, Complete Cyl Q arid Assembled Computes amp Displays WPM copy rate amp Buffer Status Selectable...

Uhf Power Amplifier Module

. . . designed for 12.5 uoft UHF power amplifier applications in industrial and commercial FM equipment operating from 400 to 512 MHz. Specified 12.5 Volt. LJHF Characteristics Output Power 13 Watts Minimum Gain - 19.4 dB Harmonics - 40 d6 50 2 Input Output Impedance Guaranteed Stability and Ruggedness Gain Control Pin for Manual or Automatic Output Level Control Thin Film Hybrid Construction G wes Consistent Performance R Tr nsiitor Riset nc F'lug In U nigh Gain Different Compara or Plug In...

Cushcraft Antennas

Tritander 175 ATB34 4 El. Tribander 219 ATV3 20-10 mtr. Vert S 39 ATV4 40-10 mtr Vert S 85 ATV5 80-10 ran. Vert S 90 Z0-3CD 3-EI. 20 mtr Skywalker S165 20-4CD 4-EI. 20 mtr Skywalker 239 15-3CD 3-EI. 16 mtr Skywalker 82 15-4CD 4-EI. 15 mtr Skywalker S 98 10-3CD 3-EI. 10 mtr Skywalker 59 10-4CD 4-EI. 10 m tr Skywalker 76 A50-5 5-EI. 5 mtr Beam 59 817-fiB 6-EI. 5 mtr Boomer 169 32-19 19-EI. 2 mtr Boomer S 75 214B 14-EI. 2 mtr Boomer S 59 214F B 14-EI. 2 mtr FM Boomer S 59 228FB...

Deluxe

SWR, forward reflected wattmeter, rf ammeter, dummy load, antenna switch, balun. 3kW PEP MFJ-982 3kW Versa Tuner iv. 7 position ar-tenna switch, balun, 3kW PEP MFJ-981 3kW Versa Tuner IV SWR. fcrxvard-reilectsd wattmeter, bafun. 3kW PEP MFJ-980 3kW Versa Tuner V. Built-in salun. 3kW PEP .'iFj-S62 1.5 kW Versa Tuner III. SWR, forward-reflected wattmeter, 6 position an'enna switch, balun, K5kW PEP MFJ-961 1.5kW Versa Tuner III. 6 position antenna switch, balun...

Finco

AliW EIL AM lUMfTF -lEl A6-S BEAM 6 Mf URSEL A62 Ht AM UUaL bU MtT R A -lD E3FAM 2 ME dft 10 L Al1 . SEAM 220MH 10EI. J si V Vf HTAJL 4 .1 MTB H te 5E i' VL 1H 80-1 e MtK - Uj TWOM ri 5 lt ', A HC gt _ CCT-H4 r JM TER CCM EAR WITH II1JH C7-1-U r . I lt T ftASf 5 ATO-N col . TfeAK CtsvER .' . . . 5510 7RAfvSCEi S . , v.-t TCA gt 5CE lt Vfil C.fNERAl t Vi KfCl WiHPI -IbiUfj 2 5SA 2.M i M J3 TRAVSCi Vf R e 14 CO tKl iVOitOPlii n p.- iMi FXTWSA'O PA r .1 1 i-j 55 StMSTO.I'.HT St JAfc. ilA n-l- IbOA...

Call Today

1280 AIDA DRIVE, COLUMBUS REYNOLDSBURG OH 43068, 614-866-4267 A w n Brings you the H BreaKthrough cause .somebody says it is your duty. That way, you're playing the heads-l-win-tails-you-lose game no matter whether your project succeeds or not, you'll have had a hell of a lot of fun Tackle the absolutely impractical projects the ones where you'll have no pro competition. And always disregard Authorities of course they're sure it's impossible. If they weren't, they'd have gone after it...

Mm

BOX 1101 SOUTHGATE, MICH, 48195 PHONE 313 285-1782 a Print frame same as for negative Home brew b No. 2 Photoflood bulb Photo Store c Metal developing tray cake pan. Dept. Store etc. d Blank PC boards sensitized with Kepro Kodak KPR-4 e Kepro Type KD Developer Kepro Table 5. Equipment and materials for board exposure and developing. reversed from the pattern actually required as you look at it in this attitude. Clamp the print frame pieces securely to force the...

Off To See The Blizzard

When word of the destructive Allen hurricane came over the television, I held a hurried meeting of the 73 tech staff and suggested that our collection of a dozen or so HTs, chargers, and assorted low-band rigs which could be run from 12 volts might be of use on St. Lucia. Tim Daniel N8RK 1 got right to work packing the rigs into some Halliburton metal suitcases in case they would be needed. Next, we contacted Delta Airlines to see about getting the equipment down to Miami as the first step...

Acct

Tet Antenna Systems

15 i Send me your FREE catalog TET, THE LEADER IN WIDEBAND ANTENNA DESIGN, introduces another new triband antenna to provide unmatched wideband performance on the 10, 15 and 20 meter amateur bands. This radical departure from conventional triband antenna design employs TWO DRIVEN ELE -MENTS with a rigid phasing line to couple power from the radiator element to the reflector. Phase relationships have been carefully engineered to provide extremely high gain figures without neglecting the need for...

Hobby

73 DIPOLE AND LONG-WIRE ANTENNAS BK1016 by Edward M. Noll W3FQJ. This is the first collection of virtually every type of wire antenna used by amateurs. Includes dimensions, configurations, and detailed construction data for 73 different antenna types. Appendices describe the construction of noise bridges, line tuners, and data on measuring resonant frequency, velocity factor, and swr. 5.50. THE GIANT BOOK OF AMATEUR RADIO ANTENNAS With the GIANT Book of Amateur Radio Antennas BK1104 by your...