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Antennas : 70cm- Quadrifilar Helix antenna for 436 MHz
- This is an antenna that author just built. Was intend for receiving the AO-27 downlink (at 436.800 +/- doppler). It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB.
[ Hits: 3887 | Votes: 4 | Rating: 4.5 ]
- 440 Mhz J-Pole Antenna plans
- Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. Author use 1/2 inch copper pipe, and the associated fittings necessary. The dimensions aren't typical however, this is what it took to get its SWR low.
[ Hits: 20922 | Votes: 51 | Rating: 4.8 ]
- Microvert antennas by DL7PE
- Progress in Design of Extremely Short Transmitting Antennas Short and still efficient, how is that possible? By Juergen Schaefer, DL7PE author of the MicroVert antenna concept. The MicroVert introduced in this document is an extremely short and hardly visible short-wave antenna with outstanding radiation properties
[ Hits: 1942 | Votes: 5 | Rating: 7.5 ]
- IW3 - Luis Trenked Award
- This certificate is awarded by the AMATEUR RADIO CLUB LADINIA to remember
the director and author from the Val Gardena (South Tyrol) Italy.
[ Hits: 281 | Votes: 0 | Rating: 0 ]
- The Thornhill Radio Amateurs' Club
[ Hits: 465 | Votes: 2 | Rating: 10 ]
- Florence Amateur Radio Club
- supports three repeaters in the Florence SC area. The Club Callsign, W4ULH authorized by the Federal Communications Commission.
[ Hits: 466 | Votes: 3 | Rating: 10 ]
- A Ham Radio Public utility HF Station
- Merging Internet technology with Amateur Radio holds great promise. This article discusses the authors experiences in putting several Internet Remote Base stations on the air.
By Stan Schretter, W4MQ, Brad Wyatt, K6WR, and Keith Lamonica, W7DXX
[ Hits: 7341 | Votes: 18 | Rating: 3.65 ]
- Antenna Authority
- Specializing in an assortment of directional, wideband antennas and other equipment used for radio location
[ Hits: 485 | Votes: 3 | Rating: 8 ]
- TIM-CO
- authorized distributor of electronic components; connectors - commercial and military, passive and electro mechanical components, RF-coax cable assemblies
[ Hits: 295 | Votes: 1 | Rating: 5 ]
- Russian VHF Trophy
- For carrying out of bilateral QSOs on band of 2 meters, 70 and 23 centimeters all kinds of modulation. It is authorized to spend QSOs, using all kinds of passage: TROPO, ES, AURORA, MS, FAI, EME, IONO,
[ Hits: 651 | Votes: 0 | Rating: 0 ]
- APRSearch
- APRSearch is a search engine targeting only sites from APRS software authors and other sites with unique and detailed APRS documentation.
[ Hits: 337 | Votes: 1 | Rating: 10 ]
- Digital Modes used in Ham Radio
- Article with waterfall pictures and samples of several digital modes like psk31, sstv packet pactor hellschreiber domino thor jt65 and more
[ Hits: 1129 | Votes: 3 | Rating: 7.67 ]
- Digital ATV in simple terms
- This article was first published in CQ-TV issue 208. Author try to explain digital television in layman's terms and without getting too involved in mathematics.
[ Hits: 573 | Votes: 0 | Rating: 0 ]
- WSJT for Meteorscatter - Tips and Tricks to start
- Tips and tricks to start working Meteorscatter with WSJT. Author: PE1AHX
[ Hits: 652 | Votes: 4 | Rating: 9 ]
- PC4U HF/VHF Mobile amateur station
- Describes the author's mobile HF and VHF station setup. PC4U (Mobile) Ham Station HF/V/UHF or via EchoLink PC4U-L
[ Hits: 684 | Votes: 3 | Rating: 10 ]
- AMP Lady
- Authorized factory sales and service center for Emtron. Repair service on all tube type amps HF Vhf
Uhf from Palm Bay FL
[ Hits: 2320 | Votes: 8 | Rating: 8.25 ]
- Beltronics, Inc.
- Beltronics is a factory authorized Kenwood, Icom & Yaesu (Vertex/Standard) Repair Center, Hollis, NH
[ Hits: 1573 | Votes: 3 | Rating: 4 ]
- DBFToAdif
- Freeware , 3.8 MB executable that allows the conversion of some old DBF log files (DXLog, EasyLog, LogPlus, TopLog, TurboLog TotalHAM92) to the ADIF Format by TRX-Manager authors
[ Hits: 988 | Votes: 1 | Rating: 1 ]
- Ham Radio Control Libraries - HamLib
- Hamlib is a library aid for software developers wishing to incorporate control of amateur radio hardware into their programs. Hamlib will allow ham radio software authors to concentrate on the user interface and the basic function of the program rather than radio control.
[ Hits: 1146 | Votes: 3 | Rating: 7 ]
- Tuna Tin 2
- The Tuna Tin 2 is a simple transmitter originally designed by the legendary author and experimenter Doug DeMaw, W1FB. The TT2 was first published in the May 1976 issue of QST.
[ Hits: 800 | Votes: 0 | Rating: 0 ]
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