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842 links - and 5 categories

Antennas : 10M
  • 3 Element Antenna for 28 Mhz  pop - The DF9CY three-element antenna for 28 MHz by Christoph Petermann DF9CY
    [ Hits: 26629 | Votes: 40 | Rating: 4.73 ]
Antennas : 6M
  • 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 ]
Antennas : Yagi
  • 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 ]
Ham Radio : Clubs : Contest Clubs
  • 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 ]
Ham Radio : Clubs : North America : USA : Massachusetts
  • 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 ]
Ham Radio : Clubs : North America : USA : Tennessee Manufacturers : Amplifiers
  • Commander Amplifiers  pop - 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 ]
Operating Modes : Packet Radio
  • Packet radio networking - Packet Radio networking home page with lots of informations and tech. resources
    [ Hits: 1287 | Votes: 1 | Rating: 7 ]
Operating Modes : Repeaters : Repeater maps
  • New Zealand Repeaters - New Zealand Amateur Radio 70, 32 & 23 cm (UHF) Repeaters
    [ Hits: 790 | Votes: 2 | Rating: 5.5 ]
Propagation : Resources
  • 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 ]
Radio Equipment : HF Transceivers : Kenwood TS-690S
  • Kenwood TS690S - Expanding frequency coverage, transceiver Labtest by Christoph Petermann DF9CY
    [ Hits: 3378 | Votes: 35 | Rating: 5.59 ]
Software : Utilities Technical Reference : Amplifiers : UHF Amplifiers
  • 432 MHz EME PreAmplifier - 432 MHz EME low noise amplifier. Circuit, components and image by Christoph Petermann DF9CY
    [ Hits: 9749 | Votes: 21 | Rating: 5.43 ]
Technical Reference : CB Radios
  • President CB Radio Mods - Windows operated software and technical documentation for President CB-Radio`s
    [ Hits: 25140 | Votes: 184 | Rating: 5.89 ]
Technical Reference : Components Technical Reference : Radio Frequency Interference
  • EMI Calculator - Does your Amateur Radio system comply to the EMI rules ? (German values implemented)
    [ Hits: 1509 | Votes: 8 | Rating: 6.63 ]
Technical Reference : Repeater
  • 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 ]
Technical Reference : TVI Filters
  • TVI and BCI Filters - TVI and BCI bandpass and bandstop filters in SMD technique. Schematics and images.
    [ Hits: 4327 | Votes: 6 | Rating: 5 ]
Technical Reference : Transverters
  • 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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