Engineering Consulting

CA 92621 (714) 671-2009 _ The Model 335A will deliver 35 watts of power using the latest state-of-the-art circuitry. The amplifier will operate SSB or FM and is compatible with most handhefd transceivers, including the TR2400, TR2500. IC-2ATt Yaesu, Santec, and Ten-Tec Only 300 mw input will deliver 5 watts out 3 watts in will deliver 35 watts out. Maximum input drive level is 5 watts. Our products are backed by prompt factory service and techmcal assistance, lo become...

Worked Trumbull County Awards

The Warren (Ohio) Amateur Radio Association. Inc.h announces its Worked Trumbull County fWTC)1 Worked Trumbull County Mobile (WTC-M), and Worked Trumbull County YL WTC-YL) awards. These programs are designed to promote increased amateur-radio activity among and with Trumbull County amateur-radio operators. The awards also reward operating achievements. Application Send applications and all correspondence to Don Lovett K3BXT, Awards Chairman, WARA, PO Box 809. Warren OH. One dollar musl...

Mount Carmel Rtty Repeater

The newest addition to the chain of repeaters in Israel. W4FQMS4X RPT, was activated In the spring. Located on ML Carmel overlooking the Mediterranean Sea from a heigni of 350 meters, this repeater 'S a unique phenomenon in our region presenting the amaieurs with almost endless possibilities for use. It was built shipped over, set up, and donated to the tstael Anv ateur Rad-o Club by Ed Webb W4FQM It is a near duplicate of a machine built and operated by Ed m Florida, and the hams here are just...

Yrd Comes Home

On March 24, 1984, Roger de Weaver 9Y4RD returned home for a well-deserved three-week vacation. Many of the DXers out there will be familiar with Roger's call-sign, which has popped up in the past two years from such good DX locations as SU and ST , and Ihey may have received his attractive and amusing QSL, At the monthly general meeting of the TTARS held on April 2nd, Roger was our guest of honor and addressed us for about one hour on his experiences in the Middle East. I was also privileged...

Hamtronics Outdoor Scanner Antenna

Harntromcs. (no., a manufacturer of low-no se receiving equipmenl for ama teur radio. has announced a new antenna for scanner and rncmitor buffs to serve a need for a scanner antenna which is half way between a bunt in whip on a scanner and a arge outdoor antenna requiring root mounting with some sod of mast ar rangement. Hamtronics has designed a compact Power Antenna' wnich may ty msta ed easily on th- side a house Outside a window, m an attic etc . A-ihout any special rnasl or brackets...

Doctor Dx From

It was Saturday momlng, and the CO WW X Contest was In full swing. As my wife walked past the shack, she voiced her familiar Are you going to be on that radio all weekend complaint. Moments later she remembered thai I didn't have an antenna up Obviously something strange was going on. for the sound of a raging contest was pouring out of the station speaker even though the hg was turned offt I've been blessed with an understanding mate, I explained that, yes, I would be contesting all day...

Island Dx Award

The IDX Award, sponsored by the Whid-bey island DX Club, Is one of the most sought after awards in the DX community This award is available to licensed ama teurs and shortwave listeners worldwide. The IDX Award is issued for SSBt CW, RTTY. SSTV, and mixed mode, as well as for mixed- and single-band accomplishments. Applicants must work fifty (50) IDX islands lor the basic award. Endorsements are given in increments of 50 islands, up to and Including the maximum number of islands possible. Only...

Magicm Rf Speech Processors

Add 15 dB of averegr output with genuine if clipping m your transmitter's i stage. Custom engineered for Kenwood TS-t 0, TS 130 TS-430 TS 520. TS-530, TS-B2Q Drake T-4X. TR-7 Yaesu F1-I02. Extent speech quality simple Installation, af tamable prices' SASE fo* data anil cost Magicom PO Bo 6552A Bellevue WA 007 BN810- REPAIR iiignmern caimrat on Collins written estimates. 25, nonCollins, 50 KlMAN. ,207h-49S2215 BNB-17 need someone to adjuGi a Mite teletypewriter. will pay all repair costs and...

Ceramic Filters

12.6KC Bandpass Filter 3dB bandwidth 1.6KHZ from 11.8 13.4KHz 455KHz+-2KHz bandwidth 4-7 at 3dB 455KIIz-f IKHz bandwidth 6dB min 12KHZ, 60dB inax 36KHz 455KHZ 455KHZ 455KHz + 5y5KHz at 3dB , +-SKBz at 6dB r 4-16KIIz at 50dB 455KHz 7KBz at 3dB , 4-10KHz at 6dB f +-20KHZ at 50dB 455KHZ +-5.5K3I2 at 3dB , +-3KHz at 6dB , -f-16KHz at 60dB 455KIJZ 4 2 KHz bandwidth +-15XHz at 6dB, +-30KHZ at 4 0dB 455KHz +-2KHz bandwidth 4-12,5KHz at 6dB , +-24KHZ at 40dB 455KHZ -I lKHz bandwidth 4-4-SKHz at 6dB , 4...

Hews From Cyprus

Summenirne tn Cyprus usually means, for locaf radio amateurs, fewer voices on the air. Most amateurs over here enjoy Ihe sea or the mountains during their summer A assort and Pauto Roberto near the finish hne tn Pant Squaret Rio de Janeiro A assort and Pauto Roberto near the finish hne tn Pant Squaret Rio de Janeiro holidays and the HF rigs are set aside. However, the VHF rigs are used quite a lot from the holiday or portabfe locations. Most of the contacts are between local hams, but some DX...

Info

Fig, 4(a) shows a homebrew square-wave signal generator based on the Motorola MC4024P voltage-controlled oscillator (vco) chip. Note this is not the CMOS 4024 device. The MC4024P contains two vco's, but this project uses only one. The frequency is controlled by capati-tor CI and is set to approximately the range needed for our application In some cases we will want to vary the frequency, so we can use the circuit modification of I ig. 4(b) Potentiometer R3 changes thr voltage applied to the...

Model Ap

Designed for APARTMENTS MOTELS VACATIONS Quick Simple installation Operates on 2,6,10,15,20,30 and 40 rnetef5 All coils supplied Only 22-1 2 inches long. Weighs less than 2 lbs Supplied with 10 ft RG 58 coax and counter poise. Whip extends to 57 inches, Handles up to 300 watts. VSWR-1.1 1 when tuned Wrtfe tor rrpore ctei on arid cfly* BA W cjioouA Quality Communication Prochxrts Sine 1932 At you Distributors wnte or call Carol Street, ns ai PA 9007 the wire. Attach about 30 feet of nylon cord...

Computer Corner

This month Madison Etedronlcs Supply has two package specials for those of you that are interested in getting Into me world of RTTY I AviTGR. Both of these packages include full function Morse, Baudot. ASC I and AMTOR rr oae of operation Package 1 includes a self-contained unit thai plugs directly into your Commodore 64 and a spectrum analyzer type tuntng indicator that is as good as a scope for tuning AEA MP-64 2 TU & Soitwear retail 239.95 AEA TI-1 tuning indicator retail 119,95 AEA A01...

Philippines

Afmazan WAGLOS DU2 7 0098 Knight Drive San Diego CA 92126 In my iast column I wrote about the amateur-radio scene in the Philippines today. After a rather nice lengthy QSO with a W7 ham from Seal tie. Washington, who happened to be in he Philippines before World War II, he not only told me how they used to DX on 40 meters with RCA s CW rigs, and Arc-50 receivers coupled to high zepp antennas, he also sparked my curiosity about the history of amateur radio in the Philippines After taEking...

Ham Help

F need a VLF receiving converter similar to the now discontinued MFJ-332. Its input should be 1 MHz and below, and its output should be on one of the HF ham bands, preferably 10 meters. I will buy a used MFJ-332, a kit, a circuit, or any other equipment. Roger Coppock 2800 South 10th Ave. Broadview LL 60153 Would someone piease help me find a schematic or manual For a Communications Power, Inc., model WM-1Q00 wattmeter I will giadiy pay for any costs incurred, Richard Whipkey ADGX 866 Yolo Way...

Method Of Mounting Cross Booms Use Washers On Both Side Of Bolts Tq Prevent Damage To Wooden Mast And Booms

BA1 ANCEP FEED AND FH SlNG .INR HEfiE. SOLDER TO L UGS FOR GOOD ELECTRICA CONNECTION- boom about ten times at each hole. A dab of epoxy glue covers the wire and fishing line. Attach the phasing line between the two feedpoints. 1 use twinlead sixteen inches long. The main feediine is also 300-0hm twinlead and is connected to either element. The feediine is then taped to the wooden center support. See Fig. 4. Electrical tape is used to secure the phasing line also Standoff...

Wantedmilitary Surplus Radios

We need Collins Sisl . 548U t v 426U2. UHF719A 6ieT ARC 91 ARC 102 RT-712 ARC 105. ARC tt4. ARC-115, ARC 116 RTS 3fARGl3l fM622 W.Icoj 807A or RT-857'AflC 13J. ARC 159 ot FiTM6dAHCH6-i ARC-174 NT I299'ARC 186 AP gt 7 APN 171 MRC-98 7I3F1 2 HF 105 Cohins antenna couplers 490T t 1 amp 0T 2, i90T9 CU-165 amp A ARC CU t669. GRC. CU 1402'ARC 490B-1. CU 1239'ARC 105. Top doUir paid or trade to new ama leur gear Write or phone Bill Slop. Slop Electronics Company, Highway Otto NC 8703 704 7519. 8NB204...

Tips On Chips

A good way to learn digital electronics is to learn about the various lypes of digital integrated circuits an the market. Every manufacturer of integrated circuits publishes spec sheets and data books describing ihe r product line. These publications, which are usually available at modest cost, contain a great deal of use ful information. One reference which I use often is the National Semiconductor Databook. This publication lists many types of digital logic circuits ranging from simple NAND...

Cushcraft Satellite Antenna System

Cushcratt has Introduced a new complete amateur satellite antenna system featuring two high-gain, circularly-polar Ized yagi antennas, The 70-cm, 16-element uplink and 2- lt neter, 20-element downlink antennas are fixed to a common mounting Doom. The entire array is lightweight with reasonable dimensions for quick installation. For more information, contaci Cush craft Corporation PO Box 4680 Manches ter NH 03103 603 627 7677 telex 953050 Cushsig Man, Reader Service number 480, The IC-27H...

Atj

lifib PoHvei H T Amplifier A Mode Operation with R fretmp C 012 VA Meter Dual Purpose Amplifier 10 Watts In 120 Watts Out 2 Waris In 40 Watts Our 3012 1 Meter Amplifier 30 Warth In 120 Watts Out 2 Watts In 40 Warn Out All Mode Operativ FM,SSE,CW.- TV Optional N1 Type ortnectora DI010 4.10-450 MHx Dual Purpose Amplifier LO Watr n tOO Waits Out 2 Waits In Warts Out All Mode Operation FM SSBrCW.ATV Optional N Type Oc iwttors D3010 430-450 MHz Amplifier 30 Watts In 100 Watts, Out All M ic...

Antuner And Hamantuner

L Industries has introduced Antuner, an automatic antenna luner with no moving parts. Anluner covers a wide spectrum af frequencies from .1 MHz to 100 MHz. An Cushcratfs new amateur satellite antenna system Cushcratfs new amateur satellite antenna system Tne ACT-1 Power Antenna 15 a broad band winp antenna with a iow iotse pre ampiiher m us base Although much smaller than a fulhsize outdoor antenna 125 inches tall , it provides good coverage ot distant signals and is capable of outperforming...

Practical Wireless

1 will now digress sornewhai from the g rerai type of news and information that makes up the Outk of this column. This is because I have iust come into possession of three books recently published in the UK of which I wo are directly related to amateur radio arid ihe third of which will be useful in mosi shacks. All three books are reprints of a number of arilcles originally published in Practical Wireless, ihe monthly UK publication dealing with all aspects ot radio tand not necessarily of...

Equipment

Edge connector, commoniy called the ROM port. This is. in fact, an extension ol Ihe CoCo's address and data bus, Several manufacturers take advantage o this fact t gt gt building short extension bitten, kind of mini mother boards, which allow several RQMpack i ,pe devices lo be pJugged in ai once, Noa with that sa d lei's look at NEWRTTY This program sends RTTY da ta Out and recei.es demodulated RTTY da la in hrough the cit-bange RS 232 pod The software drivrng the port has been changed so that...

Conductor

osep t I Or K4IPV 5440 So. 8th Road Arlington VA gt 2204 Maximize your system's performance with this easy-to-construct noise bridge. Its just what the doctor ordered The antenna noise bridge is an instrument which most amateur-radio enthusiasts have seen advertised but only a tew know how to use. Several different models arc offered by Palomar, Omega-1 and Ml- see photos When used with a receiver preferably a general-coverage shortwave receiver , the noise bridge makes it easy to wring out...

Bilal Isotron

Antenas Isotron

When Ihe box arrived in my office last Wednesday, i remember thinking Even Ralph Biial couldn't fit a 40-meter anienna into a package only 33 x 6Yz x 3. . . why, that's smaller than the boxes most model airplanes come in Ralph had promised to send me the latest version of this Isotron 40, a small, versatile antenna designed for limited spaces such as apartments, condos, campers, and Ihe like where it is almost impossible, for either legal or physical reasons, to put up a lull-sized antenna,...

Hustler

Hustler Btv Kit Radiales

ALL BAND HF PERFORMANCE Hustlers new 6-BTV six-band trap vertical fixed station antenna offers ail band operation with unmatched convergence. The 6-BTV offers lO,15- 2Q 30, 40, and 75 60 meter coverage with excellent bandwidth and tow VSWR Its durable heavy gauge aluminum construction with fiberglass trap forms and stairv tess steel hardware ensures long refcabilrty. Thirty meter kits 30-MTK for d-BTV and 5-BTV are also available, HUSTLER -STILL THE STANDARD Of PERFORMANCE,...

Poland

Jerzy Szymczak 73-200 Biatogard Buczka 2 3 Poland The Board of the SP DX Club issued IB member diplomas recently. The last diploma number is 323, Every candidate for the diploma must produce QSL cards confirming mutual radio contacts w th his own radio station with 75 countries on 6 continents. After a 6-month period, he can receive the diploma if he produces QSLs from 101 countries. Actually, 25 candidates are waiting for the diplomas. There are 1710 honorary members of SP DX Club. To every...

Control Specialties

See Lisi of AttvfJ'sers or page 96 John 5. Wilcox KS4B 640 Breton Bay Drive Leonardibwn MD 20650 Build an 80m DX-getter that really grows on you. Eighty meters is a fun band. Something for everyone is the byword. From the diverse nets entangling the top end, through the casual groups and rag-chews in the spectrum, to the well-populated CW band, you are challenged not to find an entertaining operation. DX, especially in the winter months, is surprisingly good With the sunspot cycle approaching...

Super

Well, once again 1 am impressed by 73- I tooK a while to type the code program in Sounds Good lo Me, June, Mike W5VKC 1 and Rick WB5AYD did a greal job of putting it togeihef. Congratulations to them for it They at least look the trouble to translate for both the VIC 20 and the C-64. That is nol dor in some maga z gt nes. As pe usual my typing coniamed a multitude of mistakes I listed the results to my phnte , proofread it f thought , and sent Mike a copy and asked htm lo tell me what happened....

Ten Tec Model Antenna Tuner

Awhile bat k, I saw advertised in 73 ihe Ten-Tec Model 4229 Anlenna Tuner kit Phoio AAfter -some pialn and fancy dancing. I managed to snare Ihe checkbook a y from the XYL to order it. As I am a raThet new ham, she didn'i realize the rradihon-seilrng ihis order entailed mail sysl m, in aboul ihree weeks large box arrived trom Sevierville, Tennessee, Only Ihree weeks lo ge an order from the United Slates 10 Guantanamo Bay, Cuba, can be likened to same-day service. Fortunately I did not have duty...