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Antennas : 10M- 3 Element Antenna for 28 Mhz
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- The DF9CY three-element antenna for 28 MHz by Christoph Petermann DF9CY
[ Hits: 26629 | Votes: 40 | Rating: 4.73 ]
- 50 MHz Antennas by DF9CY (4 & 6 Element)
- Two well performing 50 MHz antennas designed with W7EL EZNEC along to many other antenna projects and related articles
[ Hits: 22073 | Votes: 37 | Rating: 4.39 ]
- DF9CY - ZX15/4 extended 10/4
- A 4 element addition for 10m to an existing 4 element yagi (ZX antennas)
[ Hits: 1257 | Votes: 1 | Rating: 9 ]
- Northern California Contest Club
- Specialized amateur radio club devoted to the pursuit of operating and technical excellence in radio contesting
[ Hits: 1545 | Votes: 0 | Rating: 0 ]
- Yankee Clipper Contest Club
- Special purpose amateur radio club devoted to the pursuit of operating and technical excellence. This site serves as a library of amateur radio contest and DX information.
[ Hits: 1126 | Votes: 3 | Rating: 7 ]
- Kingsport Amateur Radio Club / Bays Mountain Radio Club
- Kingsport Amateur Radio Club / Bays Mountain Radio Club , Serving Tri-Cities TN/VA Area, Useful Technical Links, Club Photos
[ Hits: 610 | Votes: 23 | Rating: 8.34 ]
- Commander Amplifiers
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- HF anf VHF amplifiers made in U.S.A. by Command Technologies, Inc. now acquired by Palstar
[ Hits: 31836 | Votes: 34 | Rating: 5.94 ]
- QRO Technologies
- HF amplifiers manufacturer maker of HF-2000 RF power amplifier
[ Hits: 10793 | Votes: 17 | Rating: 8.35 ]
- Packet radio networking
- Packet Radio networking home page with lots of informations and tech. resources
[ Hits: 1287 | Votes: 1 | Rating: 7 ]
- New Zealand Repeaters
- New Zealand Amateur Radio 70, 32 & 23 cm (UHF) Repeaters
[ Hits: 791 | Votes: 2 | Rating: 5.5 ]
- Long Path Propagation
- Long path hf radio propagation is sometimes the best path to work dx, since the shortest path is not always the best path.
[ Hits: 2589 | Votes: 7 | Rating: 5.43 ]
- Kenwood TS690S
- Expanding frequency coverage, transceiver Labtest by Christoph Petermann DF9CY
[ Hits: 3378 | Votes: 35 | Rating: 5.59 ]
- Pathloss Calculation and EME
- Java free space pathloss calculation and EME
[ Hits: 2506 | Votes: 46 | Rating: 4.99 ]
- 432 MHz EME PreAmplifier
- 432 MHz EME low noise amplifier. Circuit, components and image by Christoph Petermann DF9CY
[ Hits: 9751 | Votes: 21 | Rating: 5.43 ]
- President CB Radio Mods
- Windows operated software and technical documentation for President CB-Radio`s
[ Hits: 25140 | Votes: 184 | Rating: 5.89 ]
- Radio Component Database
- Technical documentation for Radio Component`s
[ Hits: 3419 | Votes: 11 | Rating: 6.36 ]
- EMI Calculator
- Does your Amateur Radio system comply to the EMI rules ? (German values implemented)
[ Hits: 1509 | Votes: 8 | Rating: 6.63 ]
- Amateur Repeater Builders
- Radio Mods, Technical Data, where to Purchase Equipment Amateur Repeater Coordination. All you need to build a repeater
[ Hits: 6933 | Votes: 5 | Rating: 6.8 ]
- TVI and BCI Filters
- TVI and BCI bandpass and bandstop filters in SMD technique. Schematics and images.
[ Hits: 4329 | Votes: 6 | Rating: 5 ]
- 50 MHz Transverter idea
- Complete 144/50 MHz transverter with GaAs Fet LNA and 400 mW out. No printed circuit board. Schematics and images by Christoph Petermann DF9CY
[ Hits: 9895 | Votes: 35 | Rating: 5.91 ]
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