Hong Kong

Philip J Weaver VS6CT PO Box 12727 Hong Kong First of all, may I take this opportunity to wish all 73 readers a very Happy and Prosperous New Year from everyone in Hong Kong In December, after my five-month around-the-world trip, I decided to stay on in Hong Kong regardless of the 1997 issue. The Crown Colony 99-year lease ends then, and China has indicated its intention to regain sovereignty over Hong Kong at that time.) I've lived here 13 years now, and this is the place for me. I'm...

New Repeater

The Chicago area has a new ATV repeater under construction The remote transmitter portion of it went on the air in December. The project is sponsored by The Peacock Amateur Radio Club, winch is made up largely of broadcast engineer types at many of the area TV and radio stations. Henry B, Ruh KB9FO heads up the project. Touchtone1 control of the remote transmitter (mode A) is being done on 144.31 MHz. The actual repealer (mode B) will have sync recognition access on UHF. Input to the KB9FO ATV...

Visit To The Rsgb

My wife Sherry dropped a brochure from the Show of the Month on my desk a couple months ago Amidst the listings of shows in Boston was a notice of a Thanksgiving trip to London, Hmmm, It left Thanksgiving eve and returned on Sunday, allowing three days in London, so not even a day of work would be missed. The price was 499 including round trip airfare, a first-class hotel (Hilton), breakfasts, and two road station, I guess everyone else was busy. It was a fine, brisk winter day, so the...

Simpson Probes

Mercer 9605 Logic Probe

Two new logic probes and a new putser probe are now being marketed by Mercer Electronics, a division of Simpson Electric. The model 9604 (20 MHz) and model 9605(50 MHzjtogfC probes come in a sfim case and are useful for troubleshooting both TTL and CMOS circuits Levels and pulses Two new battery packs from Centurion Tokyo Hy-Power Labs1HL 2K A linear. 18 73 Amateur Radio March. 1967 Two new battery packs from Centurion can be observed on two front-mounted LEDs both models feature a pulse...

Kev

One way of moving a crystal's frequency, besides padding it wi h capacity, is to insert series inductance (Fig. 2). Depending on the crystal's characteristics, frequency changes of about 1T000 ppm may be obtained with 20 to 30 uH. The idea of a filament choke is isotation from ground. This allows power to be fed to the cathode For practical purposes, about 500 to 600 Ohmsof isotelion is sufficient. To construct the choke, twist together two 6-8-+nch lengths of 12 or 4 insulated wire. Then take...

Compatibility Guaranteed

Customer feedback in 1986 insisted on system compatibility. Responding to this challenge, a special Plug and Play Harness to hook you1' favorite radio to the LK500 is offered as an accessory. Of course, all Amp Supply amplifiers have our famous ATI-6 tuned input systems, assuring a perfect 50 ohm load to your transceiver. AUTOMATIC LOCK OCT NEW All the new LK-500ZC Series amplifiers are equipped with the ALO which stops amplifier operation when it senses an unacceptable SWR, improper tuning, or...

Backpacking

T like to operate portable QRP Alan Pike W8MGF sent me a letter and the photographs shown here. Alan likes to get out and away from it all by backpacking into the boonies and operating QRP, He says J am inlo backpacking and am a member of a group of guys that go hiking every year. We always take off the first week after Labor Day. It takes some extra sailing with the wife, but is weil worth the effort. For six days last September we tackled the trail that goes atong the shore of Lake Superior,...

Connectors Made In

NE 20 Tjpe N tor ttelden 5913 4 PLZ59 StHin'.iril P U(t 1di flG& ZU JC b W nr P12S9AM Amplwri PUSS J0 7 90 & i UGZiD l & *MwftG& 213.214 J LKj A3 & Hftmil* 10 PL259 6 G17V& topttrt BC5j 59iipei i LO J& Uw U625 S0 J9 tf BNC Aftrpiiera 3 GS31& 3 lfi T-njiedCfippo GSaiftS 16 Plii rl Gait ur write lui complete price h& i Nerval's 32-page Cable ii Connector Selection Guide is available at no Charge with orders of 50.00 or more, oral a cost of 4.00 individually. 12240 N,E,...

Icom

Other Accessories - continued Regular SALE 6-meter VHF Portable Regular SALE IC-505 3 10.7 6m SSB porta le 549 00 489 BP-15 AC LC-10 Leather case 39 50 VHF UHF base mu fr-mode Regular SALE IC-5510 80W 6-meter SSB CW______________799.00 719 BC-10A Memory back-up 9.50 IC-271A 25W 2 meters _ CLOSEOUT 859.00 699 AG-20 Internal preamplifier 64.00 JC-271H 100W 2m FM SSB CW 1099.00 969 AG-25 Mast mounted preampliiier,,. 95.00 IC-275A 25W 2m FM SSB CW ps 1199.00 1049 KM71A 25Wfl30-450,,,. CLOSEOUT 979...

Info

Get a boost from Bob Howard WA60LI of West Covina, California, He tells lis that he was anxious to mention that in the September issue of 73's RTTY Loop, the answer to VE2AGY's question about the TS-1000 was right there, under the ZX-81 banner. You see, Timex manufactured the 2X-81 for Sinclair and when they decided to market it in the U,S. under the Timex fabei as a TS-1000, they only added IK to the memory to make it 2K RAM plus the 8K ROM, When either the ZX-81 or the TS-1000 is expanded to...

Santa Glaus Award

The Worked Santa Claus Land Award is now available for qualifying contacts made after January 1, 1986 20 points required for Europe OH stations, 15 for Europe, and 10 for stations elsewhere. Comact with OH9SCL -situated at the Arctic Circle in Finnish Lapland is worth 5 points 10 points in December contacts with OH9, OF9, OG9. and OI9 stations are one point each 3 each in December . There are about 150 OH9 stations. No band or mode limits same station can be counted only once one SWL report per...

Cable Tv Descramblers

System Control Interface

FINEST WARRANTY PROGRAM AVAILABLE LOWFiT PETArL U HOLEiALE PITFCE5 IN US. ORDERS SHIPPED FROM STOCK WftHIN 24 HOURS FOU FREE CATALOG O LV 1-800-345-8927 FOR AUI- INFOHMATION 1-818-716-5914 CONTROL rOUR SHACK FROM YOUR MOBILE H.T Repeater Controller Dual Remote Rutopatch System control interface Cartridge Option Instant code practice mode controlled from your H.T. System control interface Cartridge Option Remotely programable with Touchtones change up to 9 sets of access codes from H.T, or...

Oci

The Pacesetter has become a legend in DX and contest circles. Covers till 10 Amateur bands 50 kHz extended coverage , Wide receiver dynamic range, junction FETs in the balanced mixer, MOSFET RF amplifier at low level and dual resonator for each band, Variable bandwidth tuning VBT . Vanes IF filter passband width. Notch fitter high-Q active circuit in 455-kHz second IF. Nosse-blanker threshold level control. 6146B final with RF negative feedback Runs 220 W PEP SSBJ 180 W DC CW input on all...

Prosearch

Pro-Search Is Adaptable To Many Systems, Simple To Install. Disconnect your present antenna control system and connect ours. Pro-Search is used with HAM-M, HAM-II, III. IV. and TX2. Other models are available to work with the HDR-300, etc. 1-800-325-4016 1-314-994-7872 Missouri Pro-Search Electronics 1350 Baur Blvd. St. Louis. MO 63132

Jensen Telvac Tools

Jensen Tools has introduced a new service kit for the budget-minded electronic technician. The kit contains 40 high-quality hand tools housed in a wood and vinyl case with removable pallets, a document pouchr and lockable latches. The tool selection includes screwdrivers, pliers, nut and hex drivers, punches, wrenches, soldering equipment, a hemostai, reverse-action tweezers, and other specialty items. For complete details on Telvac economy toot kits or a free catalog of Jensen tools, please...

Coming

Several interesting items have arrived at the shack lately for review purposes, among them the Kenwood TS-711A yes, I'm finally getting around to reviewing it , ICOM IC-275 mobife multimode, SSB Electronics LT33S 902-MHz transverter. Microwave Modules 50 28R 50-MHz transverter, and yagis for 144 and 902 MHz from Tonna. IVe even heard rumors that a new Yaesu 727 duai-band HT is on the way as well. One thing is certain I won't run out of VHF and UHF equipment to review in the near future. I'd...

Linear Transverters

This month I'd like to touch on a previous topic that might benefit from further discussion. This topic is the theory and operation of linear transverters, since a great deal of misconceptions exist regarding these devices and how they work, IVe also seen many examples of improper use and subsequent damage of transvert-ers, largely due to these same misconceptions. Let's get down to basics A linear transverter ts probably the simplest way to get a signal on the VHF and UHF bands. By definition,...

Flh

FL-6 6Hi Q Resonators with Lo Noise Transistor Amp 2M or 220 MHz FL-4H 4Hl Q Helical Resonators amp Lo-Noise Tr. Amp. in shielded housing. 420-470 MHz Provides tremendous rejection of out-of-band signals w out the usual loss Can often be used instead of large expensive cavity filters. Extremely helpfuJ at sites with many nearby transmitters to lJfilter-ouf these out-of-band signals. Complete solid state control for rptr. COR Hang Timer, Time-Out Timer, TX local amp remote Shutdown Reset, etc....