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ISS
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Antennas : Antenna Calculators
- RF Transmission Line Loss Calculator
- This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line types built in to the calculator.
It also gives an estimate of the mismatched loss if the mismatch is specified.
[Hits: 1566 | Votes: 8 | Rate: 5.12] Antennas : Homebrewing Techniques
- From Transmitter to Antenna
- A collection of articles on the subject of impedance, impedance matching and high-frequency power transmission by G3YNH
[Hits: 779 | Votes: 0 | Rate: 0.00] Antennas : Portable Antennas : Theory
- Matching Waves, VSWR at work
- When the radiation resistance (voltage to current ratio) of an antenna is the same value as the characteristic impedance of the transmission line (voltage to current ratio in the line), all of the electrical energy transmitted down the line is taken by the antenna and radiated into space in the form of a radio wave.
[Hits: 269 | Votes: 0 | Rate: 0.00] - Single-stub matching
- Single-stub matching of transmission lines to loads
A worked example
[Hits: 297 | Votes: 5 | Rate: 4.00] DX Resources : Ham Radio Awards
- The Washington Totem Award
- This award is issued to any licensed radio amateur who submits proof of two-way radio contact with the state of Washington
[Hits: 120 | Votes: 0 | Rate: 0.00] DX Resources : QSLing
- Formatting an international address
- The formatting of the address on an international item is dictated by the recommendations
issued by the countries of origin and destination of the item.
[Hits: 92 | Votes: 0 | Rate: 0.00] Ham Radio : ARES RACES Ham Radio : Clubs : North America : USA : Michigan Ham Radio : Clubs : North America : USA : Mississippi Ham Radio : Clubs : North America : USA : Washington
- W7BI Issaquah Amateur Radio Clun
- To encouraging all aspects of Amateur Radio operation, including public service and radio experimentation for scientific improvement of the art.
[Hits: 178 | Votes: 2 | Rate: 7.50] Internet and Radio : Sounds
- Numbers Stations
- About numbers stations, and their criptic transmissions, where to listen to them and some audio recording samples by fascinating shortwaves
[Hits: 1300 | Votes: 1 | Rate: 10.00] Manufacturers : Filters
- Filtronetics Inc
- Maker of filters, oscillators, cristals Coils, Toroidal Inductions, Solenoids, Bifilar wound Solenoids, Trifilar Solenoids and Transformers Located in Kansas City, Missouri
[Hits: 419 | Votes: 0 | Rate: 0.00] Operating Modes : Amateur Television
- SwissATV
- swissATV.ch swiss site dedicated to Ham radio ATV
[Hits: 181 | Votes: 0 | Rate: 0.00] Operating Modes : Digital ATV
- 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: 224 | Votes: 0 | Rate: 0.00] - Digital Amateur Television
- First Amateur DVB transmissions in Finland !
[Hits: 277 | Votes: 0 | Rate: 0.00] Operating Modes : International Space Station Operating Modes : Mobile : Bicycle
- Bicycles and Radios
- ARRL article on ham radio bicycle mobile operations by Dick Arnold, AF8X
[Hits: 374 | Votes: 0 | Rate: 0.00] Radio Equipment : HF Transceivers : Icom IC-746
- IC-746PRO TX Problem
- The IC-746PRO is a great rig. But it has a few reliability issues, especially with the earlier-production units. This article addresses four problem areas:. IC151 on the RF Unit.
Driver circuit on the PA Unit. HRX-muting circuit on the CTRL Unit. Predriver on the PA Unit.
[Hits: 1217 | Votes: 3 | Rate: 9.67] Shopping and Services : Parts & Surplus
- Hifissb.com
- Heathkit Icom Kenwood Power Transistors Ten Tec Yaesu spare Hamradio parts.
[Hits: 471 | Votes: 36 | Rate: 9.64] Software : Decoders
- Miltimonitor
- Linux Radio Transmission Decoder support AX.25 POCSAG DTMF ZVEI by Thomas Sailer, HB9JNX/AE4WA
[Hits: 1619 | Votes: 0 | Rate: 0.00] Technical Reference : Amplifiers : VHF Amplifiers
- 50 Mhz Amplifier
- This is a homebrew 100 watt six meter linear amplifier. The project was designed by Pat Bunn - N4LTA, and was featured in the October 1990 issue QST magazine.
[Hits: 1606 | Votes: 1 | Rate: 7.00] Technical Reference : Dummy Loads
- A 25 Watt Dummy Load
- Dummy load described here can be used for up to 35 watts for short transmissions, and up to 25 watts for longer periods.
[Hits: 2816 | Votes: 3 | Rate: 3.00] Technical Reference : Duplexers
- Diplexer 2m 70cm
- This DIPLEXER separates 2m from 70cm on the same coax cable, and allows to use 2 antennas over the same cable and permits transmission on one band
and simultaneous receiption on the other band by hb9abx
[Hits: 2286 | Votes: 2 | Rate: 2.00] Technical Reference : Test Equipment
- VK5JST Aerial Analyser
- This antenna anlyzer project was published in the May 2005 issue of the Australian magazine "Amateur Radio", and has been designed using parts which are very readily available
[Hits: 2097 | Votes: 7 | Rate: 7.15]
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