User S Report

Ralph Bilal gives you a complete set of instructions for tuning his antennas, and the 160-meter version is no exception. I placed the antenna on a seven-foot mast at ground level and began the preliminary tuning procedure using an MFJ antenna-noise bridge and the station receiver. The antenna is designed to be resonant, as received, just above 2.0 MHz, and Ralph recommends that you try it out under low power to check your swr at a frequency just below the top band edge The antenna environment...

Info

Fig. 1 Power-output tests, Drive source tCOM 740driving MMT 144 28R with step attenuator on 28-MHz transmit line De power ASTRON Model RS-35 35-Ampere. 14 0 voit regulateddc supply. Input calibration Bird Termaline 25-Watt coaxial resistor, Output foad Cushcraft 32- 19 Boomer (Type, Imp. 50 Ohms at 144.150 MHz). Input and output measured with Bird Thruline 43 wattmeters using 5-, 10-, 50-. 100-, and 500-Watt slugs. Input drive first calibrated into dummy toad, then apptied to MML 144 200 Input...

Mobile Ignition Shielding

Estes Engineering, 930 Marine Drive. Port Angeles WA 98362. BNB006 MILITARY TECHNICAL MANUALS for old and obsolete equipment, 60-page catalog, 3.00 Military Technical Manual Service, 2266 Senasac Ave,, Long Beach CA 90815. BN 045 HAM RADIO REPAIR, tube through solid state Robert Hall Electronics, PO Box 8363,, San Francisco CA 94128 408J-729 8200. BNB219 OSLS to order Variety of styles, colors, card stock. W4BPD QSLs, PO Drawer DXt Cordova SC 29039+ BNB260 date, informative,...

Faster Than A Patch

Dial home while driving by simply pushing a single button on the microphone. Craig Oichton K7UKW 2540 Esst 12th Street The Dalbs OR 97058 Its Friday afternoon You're caught in heavy rush-hour traffic. You're going to be late getting home. It would be nice to punch up the patch and advise your wife to adjust dinner time, but do yon dare risk dialing in this traffic Sure If your rig is equipped with thh speed-dial circuit, your eyes never have to feave the road This article describe* circuitry...

March

Gadgets, gadgets and more for the tinkerer And yes, Wayne's back. Photography by Frank Cordelle, igton+ NH. 78 Special Events 82 Letters These units were ordered destroyed after WWlt, but a few feii into the hands of collectors. Now, after 40 years, PA0SE anafyzes the Imperial Army's secret That annoying ac hum is robbing you of pleasure. Fix it in an hour with WA4WDI S seven-piece filter. 20 Faster Than A Patch, It's Speed Dialer Dial home while driving by simply pushing a single button on ihe...

Micro Control Specialties

Division of Kendecom Inc. 23 Elm Park, Groveland, MA 01634 (617) 372-3442 temporary license and more paperwork, along with a request for two certified photos plus iwenty US dollars, cash only. Again, much later, t received the photos back because they were written on. How else can you certify them asked the US certifying official Straightened that out supposedly, and later received another temporary license application. Here it is, December of 1985, and two weeks ago received another very...

I

Quential htghs from the counter are AMDed with the free-running clock to produce first a dual tone and then a quiet period for each digit produced. The reason for thts is so the telephone equipment can distinguish between two sequential identical digits. For example, in a phone number such as 296-5114. ii there were no quiet period between digits, the phone equipment would only see 296-514, with the V being twice as long as the other digits. Telephone equipment specifications require certain...

From Digit Sequencing Switches On Main Board

Fig 7 Solder side of the program board, showing interconnect routing. just fit if their leads are bent tightly down against the ends of the resistor body Pay attention to Fig. 6 and get the diodes in correct-iy there are two diodes near the center of the board that are reversed from the others. Next, install all the jumpers on the main board Fig, 5 shows these jumpers along with the other interconnect wires. Be sure to route these jumpers around the areas where the four ICs will be placed. We...

Am Help

We are happy to provide Ham Help listings free, on a space-available basis. We are not happy when we have to take time from other duties to decipher cryptic notes sera wled illegibly on dog-eared postcards or odd-sized scraps of paper Please type or print your request (neatly , double-spaced. on an 8- 1 2x 11 sheet of paper and use upper- and lowercase letters where apppropriate). Afso, please make a 1 look like a 1 not an I which could be an el or an eye, and so on. Hard as it may be to...

Mfjq

They are battery operated so you don 't hato to reset them alter a power failure, and battery operation mafcas them suitable Tor mobile ahd portable use. Long life battery Included. MFJ-106 is 472*1x2 in MFJ-107 is 2ttx1x2 in. RTTY ASCII AMTOR CW mfj-iks COMPUTER INTERFACE 179,95 Everything you need it Included for tending and rteaivlrn) RTTY ASCII CW on a Commodort 64 or VIC-20 and your him rig. You get MFJs most advanced computer interface, software on ta& e and aH cables. Just plug in...

Icro

15 Pin Haader A Mating Socket, V*n MT PC Crystal Citx k Qtolia or 50 3. 3DGuF35V A .al t t'7 f> - NlCh ll.Vr. coils for rj.lio elfte* fob 04 tv Proitti. toko is h. t 2 l 1 il2uh> A L-a (87TiiH Complete S < Of AH 4 o 111 , ,T. 3 50 47 0 ui 16V tA> -i I 4 1 00 VollagefteguJalofMPrinwfT > 220) 7B05 7Sl2,ra24 3 100 Mich I i i'ii 1 iiit ur , f or TO 220 Pky . 20 1 00 Vol lag Reg's i Unmarked. 60 Prime May Include PoviiWNeg & Actual l 5 1 00 78L08 Voltage PeglOM 106.TO-92) 20 1 00 2N530...

FEMA Fans

A PAIR OF H VMS from the Westchester (NY) Emergency Communications Association recently let their government know just how important amateur radio can be in a disaster Rich iMoseson N2BFG and Don Storm K2MQR spoke before a disaster-preparedness seminar sponsored by the Federal Emergency Management Agency, The talk included a video tape of hams performing emergency communications during disasters in California, and a handout containing names and tefephone numbers of local amateur emergency...

Antennas

MfRAGE AMPLIFIERS ASTRON POWER SUPPLIES Saxton Wire & Cable MAIL ALL ORDERS TO BARRY ELECTRONICS CORP., 512 BROADWAY, NEW YORK CITY, N Y 10012 We Stock AEA, ARAL, Alpha, Ameco, Antenna Specialists, Astatic, Astron, 8 H, 8 A W. 6ashf Bencher, Bird, Butternut, CDE. CES, Collins, Communications Spec. Connectors, Covercralt, Cushcraft, Daiwa. Dentron, Digimax. Drake, ETO Alpha), Eimac, Encomm, HeiU Sound. Henry. HustJer (Newtronics), HyGaia Icom, KLM, Kantronics, Larsen, MCM fDaiwa), MFJ. J.W....

Microlog

Morse code and all speeds shifts of radioteletype. It comes with a cable to connect to your radio s speaker earphone jack, demo cassette, and an excellent manual that contains a wealth of information on how to net the most out of short-wave digital DXing, even if you re brand new at it. For about the price of another Pac-Zapper game, you can tie your Commodore 64, 128 or VIC-20 into the exciting world of digital communications with the Microlog SWL. 64. Postpaid, U.S. MICROLOG CORPORATION,...

Instruction

To accommodate the ham who already has a bumper mount and whip antenna, or the apartment condo dweller who wants to match a random wire. ICOM presents the AH-2 automatic antenna tuning system for the IC-735 all band HF transceiver. The AH-2 Is Ideal for mobile operators since there Is no manual antenna tuning needed. an advantage In Inclement weather. Also the AH-2 system enables auto tuning in areas where antennas are limited, such as apartments and condominiums. panel of the AH-2a controller...

New Zealand

Jt Des Chapman ZL2VR 459 Kennedy Road Napier New Zealand As promised in my last column, I am able to bring readers a report on the JARU Region ill Conference held in Auckland New Zealand, Nov. 12-17, 1985, through the courtesy of Break-In magazine reporters. Craig Crawford ZL3TLB and Scott Campbell ZL3NR, They made their notes available to me as I was unable to be present ai the conference. H would be difficult to find a more picturesque venue than the Rose Park Hotel in Parnell, Auckland....

M

Photo Ar The MMU200S, ZOfrWatt, 144-MHz power amplifier. Photo Ar The MMU200S, ZOfrWatt, 144-MHz power amplifier. ployed a Hewlett-Packard 8640B generator and 8554-141T analyzer. No noise-figure measurements were made, due to the lack of the right test equipment. The first test we ran was receiver conversion gain, claimed to be 22 dB 1 dBm by the manufacturer. We measured 19 dB at 144,0 MHz and 20,8 dB at 146 MHz. A second unit measured 21 dB at 144 8 MHz. Sensitivity was found to be 0.07 uV...

Philippines

Almazon WA6LOS DU2 10098 Knight Drive San Diego CA 92126 Mel Bednar K6LPN DU2, current trustee of the Cenirai Luzon Amateur Radio Club CLARC . Hello, everyone Now that 1 have more free time, you probably will see more articles about the state of hamming here in DU-land. I would tike to congratulate the officers and members of PARA, the Philippine Amateur Radio Association. for its 52nd anniversary. Engr, H. San Juan of the National Telecommunications Commission said that his office is...

Armadillo County Tx Mar

To commemorate Texas' ses-quicentennial year Armadillo County has been created by Governor Mark White. Any ham operating from those highways marked The Texas Independence Trail may sign Armadillo County, Texas. The Texas DX Society is planning to operate special-event station K5DX A on March 2. 1966. Armadillo County has been sanctioned by the USACA. For further information, call Tom Taormina K5RC at 713 -489-1152 or write the Texas DX Society, PO Box 540291, Houston TX 77254-0291, The Dalton...

Usa

SIS DO tor t year Mexico, Canada S25 00 Fweign S3S OftFand tSS OOfair Permanent ill S Subtdnpiion SiQO.GO 1704 Sam Drive Birmrhgfiam AL 35235 205 BM0271 Peter H. Pat man KT2B 84 Burnham Road Morris Ptains NJ 07950 The author welcomes inquiries and comments but regrets that he cannot take telephone calls. Please put your inquiries, comments, and submissions in writing. Thank you for your cooperation. Continuing our discussions fromi last month on transverters Savaral readers have written...

Sotron Solution For The Meter Band

Small 160 Meter Antenna

Since the opening of the 160-meter band to amateur use, the 1,8-band-selector position on my FT 102 has been gathering dust. Like a number of hams, I simply do nol have space to put up a 252-foot-plus wire antenna for 160 meters. Even if space was available I doubt if I would consider a wire antenna because of the difficulty I had in getting permission to put up my 5-band vertical at my apartment. It would be nice if there was a zero-space antenna for the 160-meter band Baltimore, Maryland, is...

Kansas City Keyer

Dayton, Lance Johnson had a booth there, on a comer I think it was, and he was hawking a keyer, pretentiously claiming that with itT CW would never be the same again. I can remember seeing a group of ogle-eyed contest types huddled around the display, listening to the code coming out of a tan box, their fingers twitching and their smiles broadening as Lance led them through his spiel. The next time I thov ghl of Lance Johnson's Kansas City Keyer was a tew hours after a grueling ARRL...

Ptt

Fig, 3, Partial schematic of the existing DTMF encoder showing points of connection to the new circuit made by Mostek, part number MK5087N, The front of this microphone is labeled PCM-369. n general, if vour Azden transceiver is a PCS-3000, you will have this type of microphone Briefly, this circuit consists of a decade counter driving a set of eight isolal ed switches in sequence, as shown in Fig. 1. tach switch connects a row to a column on the DTMF generator just as the actual touch-pad...

Roller Inductor Tuner

Meat the VerrrTmrr-ViVWw-fltmpaet roller Inductor tuner ha lets you run uu to 3 KV. PEP and match everthing from 1.8 to 30 MHz Designed to match the new smaller rigs, the Mf J-989 is the best roller inductor tuner produced by MFJ. Our roller inductor tune1 features a 3-digit turn counter plus a spinner knob for precise Inductance control for maximum SWR reduction. Just take a look at ail these other great features Built-lin 300 watt, 50 ohm dummy load, twIIHn 4 1 balun and a bullWn lighted...

KENWOOD

Compatible with Kenwood's DCS Digital Code Squelch , the DCL system enables your ng to automatically QSV to an open channel Now you can automatically switch over to a simplex channel aftei repeater contact' Here s how it works The DCL system searches for an open channel, remembers it. returns lo the original frequency and transmits control information to another DCL-equjpped station that switches both radios to the open channel. Microprocessor control assures fast and reliable operation.The...

Spectrum Communications

Superregenerative Receiver Tube

Germantown PK, S3 Norrlstown, PA 13 03 215 31-1710 Telex 40-211 8 73 for Radio Amateurs March, 1986 Dick U Rollema PA0SE v d Marckstraat 5 2352 RA Leiderdorp Netherlands These units were ordered destroyed after WWII, but a few fell into the hands of collectors. Now after 40 years, PA0SE analyzes the Imperial Army's secret radio. Communication equipment used by the Allied forces during WWII has become well-known among amateurs, no doubt because enormous amounts have been sold by...

Circulation Manager

WGE Corner Peterborough NHQ345B-1194 603 92 9261 Wayne Gre-n Enterprises is a division o11nternationa Data Group 73 for flad Amateurs 1S N 0745-080X cs pubtwhod monthly by WGE Publishing Inc , a drvttion of Wayne Green Enterprises. Inc , WGE Center. Peterborough NH 0345 1 Eniire contents 19B6 by WGE Pubtishing, Inc No part of ihts pubiicalion may be reproduced without written permission from the publisher HS-5 Deluxe headphones. HS-6 Lightweight headphones. Amplifier ifor TR-2600A BNC-BNC...

R R R R R R Ft

Table. 1. lumper programming connectons. ishing touches on the project. This consists of attaching a small cylinder about one-quarter inch high around the push-button dial switch. This prevents accidental dialing when reaching for the microphone or holding it in your hands. It will not allow a casual brush to trigger the switch, but an on-target finger tip can still very easily trigger the dial sequence when desired The material for this protection ring can be nearly anything you can imagine. I...

Go Rail Mobile

The idea to work Rail Mobile on the Trans-Australian Railway from Adelaide to Perth developed from a suggestion that two Australian National-employed amateurs. Keith VK5VAX and Graham VK5BGP. undertake the activity in their off-duty period, with the approval of Australian National, The proposal that eventuafly gained acceptance involved the allocation of two Australian National tickets, the provision of a Weg-man 1st class coach for the trip, with media publicity to be sought by Australian...

Ldto

ROMpak formatting worksheet. case you will have to expand the menu. If you have fewer than seven and you wish to load more into the ROMs at a later date, the area of ROM where the future menu lines will reside will have to be left blank The lines reading FDB 5 gt 0D0D simply space the menu lines apart on the screen. The program looks for a if F value to end the menu screen This can either be put in as in the program or assumed as unburned ROM modified, tvpe A AO As the assembler scrolls...