Crystal Lattice Filters

International Radio announces two new 8-pole crystal lattice fillers for Kenwood and Yaesu radios. The IRS8H4.0C is an AM filter That has a bandwidth of 4 0 kHz al 6 dB, 2 kHz narrower than Ihe Kenwood AM filter The IR88H4.0C is used to replace the Kenv ood YK88A1 that is used m the R-5000. TS-940, and TS-930. The new filter comes mounted on a glass PC board like the YK88A1. The second 8-pole lilter us the new IR3.3H2.1 filter This filter was designed to improve selec tivity m the Yaesu FT-101...

Morse Code Tutor Program

MFJ Enterprises announces its new MFJ-1266 and MFJ-1267 Morse Code Tutor Program Iambic Keyer Keyboard. This new full-feature program for the Commodore C-G4 and C-128 teaches Morse code and is also a full-fledged iambic keyer and Morse keyboard. With the optional MFJ-76 interface board you can plug in an external keyer paddle and key a transmitter or transceiver The program follows ihe format of the ARRL s Tune in the Worfd and can be used with that course or it can be used with the MFJ...

Anoamans Adventure

Bemhard Stefan DL2GAC is a world traveller who saves up his funds while working in West Germany, and then lakes a prolonged (many monihs) DXpediliori lo varrous rare and exotic loca lions Many DXers would love to follow that life style Bernhard recently returned from several months tn India including the Andaman Islands and he shares his experiences with 73 read ers -VP2ML As VU2BMS in India,. I had worked the VU4APR Andaman son the first day ot their opera lion and ihe thought. Why not go...

Hall Of Science

merest in amateur radio, and it is working. The number of ticket applications in April broke the 3.000 mark, the first tjrne in several years and in May. the FCC received a whopping 7,065 applications The number of 6-10 forms processed by the FCC for these two months has nearly doubled over the same wo months in 1986, THE RESPONSE to the recent cal in GST for volunteers for the ARRL Education Task Force was very good It is now possible to organize and distribute the work of the group through...

Foldover Cheapie

I fell heir to several 21-foot (standard-length) pieces of galva-nized-steel water pipe, one 2-1 2-inch piece, i 2-inch piece, and others ranging down to 1-inch diameter. The various sizes and long lengths made them much too hulky and heavj for masts and rotor supports in the ordinary way, so they just lay outside my shack to be tripped over occasionally. Some time later, having to scoot to the top of my 6C1 foot tower to repair cables and replace guy wires, 1 got an aerial...

Mfj S

Now you can join the exciting world of packet radio on both VHF and HF bands with a precision tuning indicator , * . for an incredible 169.95 You get MFJ s lop quality clonc of rhr highh acclaimed industry standard TAPS TN( 2 Wt'vi-made TAPR's modem selectable for both VHF and HF operation, added iheir precision 20 segment LKJ) tuning indicator, a TTL serial port. an easily replaceable lithium ban cry lor memory back-up and put it ail in a new cabinet. If you don'i need the tuning indicator or...

Bilal Company

OK 74 34 J pH 9 1 53-4094 At BNRt we're not just looking to the future were in the business of defining and managing it. In our network of labs throughout North America and in the United Kingdom, our scientists and engineers are designing the telecommunications products and integrated office systems that will transform the way the world will communicate tomorrow. As a member of the Product-Integrity organization you will work as an RF Engineering Consuitant to a...

Model Hld Dual Band Amplifier

Tokyo Hy-Power Labs introduces the HL-725D dual band power amplifier for 144 440 MHz bands with low noise GaAsFFT RX preamps The HL-725D uses a large heat sink and the circuits of THL's well-established HL-62V and HL 60U models that have proven to be highly reliable and stable Simultaneous preamp operation of both the 144 MHz and the 440 MHz bands is possibie. Various combinations of dual TX and RX amplifiers can be used. The suggested list price is 329.95* For more information circle Reader...

Isopole Antenna Design

Isopole Antenna Design

THE EDMOND METZGER W9PRN SCHOLARSHIP has been created for students who attend the University of Illinois. Indiana University, or the University of Wisconsin. They must be pursuing a course ol study in Electrical Engineering, be a licensed radio amateur, and be a member of the ARRL For further info on this scholarship, please contact Don Eviisi-zor KA9QWC, R,R. 1 Box 206, Larwiil IN 46764-9726. GRANTED, THE DAYS OF THE TOTAL HOME-BREW STATION may be fading fast. Granted, the awesome circuitry of...

Info

J, B. (Jim) Smith VK9NS PO Box 90 Norfolk Island Australia 2899 The following was edited especially for the International Section by 73 's DXpertr Chod Harris VP2ML Ed. The dread amateur-radio nemesis Murphy was a constant com panion on my 1987 expedition to Home Island rn the Cocos Keeling chain. Despite almost continuous problems, however, I managed more than 10,000 QSOs as VK9YS from this rare location (38th on The DX Bulletin's Most Wanted survey.) The trip originated out of several...

Visa

IC-3AT 220 MHz, Jl IC-4AT -40 MHza HP fC-02AT H jgh Power IC-03AT for 220 MHz iC 04AT tor 440 MHz Regular SALE 279.00 249 299.00 259 339.00 299 339.00 299 365,00 299 399,00 339 449,00 399 449.00 389 IC u2A 2-meters 299.00 269 IC u4AT 440 MHzbTTP 369,00 329 Accessories for micros CALL S IC-12AT 1W 1,2GHz FMHT batt cgr TTP 459 00 399 A-2 5W PEP synth. aircraft HT 499 00 449 Accessories for .1 It except micros Regular BP-7 425mah 13 2V Nicad Prt use 8C 35 74.25 BP-8 800mah 8 4V Nicad Pak use...

Model Tx Atv Transmitter

This P C Electronics small transmitter (6 x 5 2 x 2 5 inches enables Technician class or higher to transmit live action color or black and white composite video and audio from cameras, VCRs, or computers. The TX70-1 is a companion to the TVC-4G receiving downconverter The unit is ideal for those who have a downconverter and now want to transmit without buying a full transceiver. The unit has the improved KPAS-c transmitter board that adds a video monitor output of the actual modulaled rf. The...

Features

* CompEetely assembled and ready 10 use * Ea y setting of your personal code m seconds wpih small fOta y switdttl No jumpers to solder - Speaker resets automatically to silem-starafry andi leaves red LED on to let you kiio* someone called wtre away from the rig * fl-i5 VOC CMOS circuitry provides lor low currpni opera -on * Built-in speaker External speaker iack also provided * Measures only Vk x 3 x 5Vj inches * Decodes all 16 digits 'ToLrii'TflrH 1 raoemali ol A74T 9 srippirt) & nanti ing...

Atv Receiver

This new receiver from Wyman Research, Inc . receives FM-ATV on 900 MHz and 450 MHz with video and audio outputs. It also receives AM-ATV on Both 900 a nd 450 MHz bands with output on Channel 3 or 4 Some features of the new receiver include 6 MHz audio subcarrier. de-emphasis circuitry for FM-ATV internal speakerfFM-ATV) GaAsFET circuitry, lighted tuning meter, and a deluxe cabinet, It requires 12volts at100 mA. For further information circle Reader Service number 207

Australia

Jim Joyce VK3YJ 44 Wren Street Altona 3018 Victoria Australia Being one of the onginal contributors to this column, I was pleased lo see a note by the International Editor (March. 1987. issue) reminding readers to send iRCs to cover return postage if information is requested from the correspondents. I would like io add to this. Since Australia is classed as the flavour of the month n America at present. 1 have probably had more than my share of requesi lexers over (he tast four years This, I...

Super Small Ctcss Encoder

Communications Specialists has just introduced a super-small programmable CTCSS encoder for use in handheld radios and othe size-restricted applications. The SS-32SMP measures oniy 53 x 1 x .16 inches and offers full tone versatility and htgh audio level. Any 32-tone frequency between 01 Hz and 255 0 Hz may be selected for storage into a 32-bit EEPROM memory. These tone frequencies may be standard or non-standard and may be changed at a later date if desired The required lone frequency may then...

Am Help

We are happy to provide Ham Help listings free, on a space-available basis To make our job easier and to insure your fisting is correct, please type or pnnt your request clearly on a full (81 2x11) sheet of paper. DoubleSpace and use upper and tower case letters where appropriate AlsoH write numbers carefully a 1, for example. can be read as an for an tor a 7 as a 1 Thanks for your cooperation. Can anyone help me with paperwork for any of the following pieces of equipment Standard Signal...

A MHz Portable Pocket JPole

Pocket Pole

Here's a cheap, quick, handieantenna that gives you 2-dB more signal than a half-wave pullout whip 1m he 220 MHz portable pocket J-pole got _ its ftrsl test under actual emergency conditions. The phones in a large area of the Continental Telephone System were out of order due to a malfunction in San Bernardino CA. As a RACES member. 1 was called in to assist the Sheriffs Department to keep communications open for county services. I was assigned to the San Bernardino County Jail. All lines were...

Edited By Bryan Hastings Ka Hy

AMATEUR RADIO HAS OFTEN BEEN ACCUSED of being a pastime for the aging not totally untrue in light of a recent poll which put the average ham at 53' QRX ihis month fo-cusses on what's happening to bring fresh blood into our hobby. But first. WE AT73 MAGAZINE ANNOUNCE LARRY LEDLOW NA5E G0CGW 9H3FS as our new Editor-in-Chief, starting in September, Larry is bringing a great deal of pertinenl experience to the post. He has been writing technical reports for and editing, official Department of...

France

Chuck writes that Paris closed down for the summer he was off to the Riviera for a two-week vacation and would write us a report on amateur radio in the south of France. The Paris International Amateur Radio Association PfARA is dedicated to serving the international amateur community in Paris and throughout metropolitan France. Membership is free and open to all, and all members receive the monthly newsletter, the Bugte. H was started by international amateurs here because licensing and...

Co Mwest Radio Systems

BC Canada V5X iL2 Chartes L Keisey WB2EDV 15 Blanchard St. MawdteNY 475 An antenna immune to almost all weather conditions, virtually static-freer and practically maintenance-free. Commercial price tags and he unavailability in the 440-MHz range helped to prompt the home-brew construction of this 4-bay folded dipoie antenna. The only array thai could be located for amateur use was a dual 8-bay version hat cost around S500. The folded dipoie is one of the most widely...

Qrp From Mountaintops

As the summer contest season draws to a close, I'd like to talk about a few portable antenna and feedline schemes I've used over the past few years to operate QRP from mountaintops. The object has afways been to get the greatest gain for the least weight. In many oases, a little gain was sacrificed in favor of a lighter load. My most popular band has been 2 meters, and I feei I've found the ideal portable antenna in the Tonna 9-element yagi see 73, July 1987 . It's light it breaks down very...

Nzart Callbook

Well, the NZART Caitbook is out, with the many sections of useful information on such things as NZART Information, the ITU Amateur Radio Disciplines, Operating Information, an international section including Ihe OXCC lists, DX zones, etc,, other radio services within ZL, and a Data section. Ail this as well as the amateur callsigns for ZL1-4, ZL dependencies, and South Pacific island callsigns. Quite a bargain at NZ13.00 around US7.00 plus postage and packing, from NZART Headquarters, PO Box 40...

Mast

73 Amateur Radio September, t987 41 to accept an appropriate U-bolt and associated toothed bracket so thai spacing is maintained see Figure 1 , This can he a litUe tricky because various diameter masts und U-boLtswill change the spacing. Do not complete this step unii he clement is uelded together. It is not known htm critical this dimension is For the easiest element fabrication, the section should he drilled in one end to accept the 3 8 material. The fit should be snug and the hole should be...

Made In

Cyvtsrs 100 MHi lo 199 999 MH In 1 HHi step with thumbwheel di i Accuracy i l paft per 10 rnir hon at all frequence Internal FM adjustable liom 0 to 100 fcHj at a l kHz rale Eternal FM input ac cepli tones or voice - Spurs and not amp e al east 60 dB below carrier Output adjustable ttom 5-500 mV at 50 Ohmi Operates on 12 Vac 'fa Amp Available jot Immediate delivery adhered Add-on acceaaonos available to extend l' Q range, do mti-niie resoljiion, AM, and a precision 120 dB attenuator Call or...

Homebrew Projects List

SASE WB2EUF, PO Box 708, East Hampton NY 11937. BN8509 VIOEOCIPHER DESCRAMBUNG MANUAL 115 pp. 27 45 ppd. Oak Orion 77 pp 522.45 ppd Satellite catalog 2 Microtrontcs. PO Box2517 L, Covina CA 91722 BNB513 ex tm preps 50 b All classes. Free catalog SASE Bahr, Dept 73-5. 2549 Temple, PaimbayFL 32905 BNB517 COMMODORE CHIPS,Authorized Distributor, Factory Fresh. 6525 6510-S9.95, 06581- 12.85T 6567- 14 75. 8701 - 7,25 PLA 82S100-Si2.50. 901226 226 227 22M10 95. and many others THE COMMODORE...

Now Only

Shipping amp handling VISA MasterCard Accepted Prepare for the fantastic world of amateur radio. Study at your leisure. No technical background required. Entry level amateur radio operators can nov. talk on the ten meter band and FM repeaters even tmk their ham radio stations to the public telephone system and personal computers Privileges never before available to the beginner' Complete FCC license preparation course contains everything you need to know topassboih the written .ind Morse code...

Smb

2356 Walsh Avenue, Santa Clara, California 95051 SupeiSCAF i a versatile switchprl-capaiiior filler fur elimiiiatliig biterfereoix and noise on CW SSB. RTTVr AMTOIt, PACKET and other narrow band modes. Efcirt'mtly steep filter skirls remove adjacent Clutter and rwj rt tea enhance weak signa reception and grt-aliy mcresse intelligibility andtirfening comfort SupeiSCAF i a versatile switchprl-capaiiior filler fur elimiiiatliig biterfereoix and noise on CW SSB. RTTVr AMTOIt, PACKET and other...

The HF Half Sloper

Sloper Antenna

Here's an inexpensive, compact and easy to build antenna that's great for DX Here's an antenna that will cover 160T 80, and 40 meters. lt s inexpensive, easy to construct, and will fit on a small city lot. It's also great for DX, It's called a Half-Sloper, The Half-Sloper for quarter-wave sloper has a low angle of radiation and exhibits some directivity in the direction of the slope. The antenna's polarization is vertical. By using the loaded coils described below, a 3-band sloper can be...