air band

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air band

36 links

Antennas : Baluns
  • How build a 1:40 Balun - Italian page about a home made a 1 to 40 balun with pictures and measurements on HF bands.
    [ Hits: 1231 | Votes: 2 | Rating: 8 ]
Antennas : Baluns : 4 to 1 balun
  • High Power 4:1 Balun - High power 4:1 air core balun for multi band fan dipole antenna
    [ Hits: 1509 | Votes: 3 | Rating: 1.33 ]
Antennas : Dipole
  • Folded Dipole - A trifilar folded dipole antenna for 80 meters band
    [ Hits: 1454 | Votes: 4 | Rating: 6.5 ]
Antennas : EH
  • DL7AHW Spraycan EH Antennas - Hairspray-can EH Antennas for shortwave and online programs. Small magnetic (H) antennas (Loops) have a good efficiency for the upper bands (20/15/10 meter band) and also in contrast to E-antenna a defined radiation direction.
    [ Hits: 204 | Votes: 0 | Rating: 0 ]
DX Resources : DX Peditions : 2020 DXpeditions
  • 5H4WZ DXpedition Pemba isl. - Members of the Low Bands Contest Club (OM7M) will take part in an DX-pedition to Pemba Island AF-063 from 6.2 – 18.2. 2020. They will be on air from 160-10m CW, SSB, RTTY & FT8. Also participation in the ARRL DX CW and CQ WPX RTTY contests. The licence is issued and callsign will be 5H4WZ.
    [ Hits: 116 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Icom IC-705
  • Icom IC-705 Presentation at Tokyo HamFair 2019 - Early pictures and presetation of the Icom the IC-705, new all bands all modes QRP transceiver introduced at Tokio HamFair on August 31st September 1st 2019.
    [ Hits: 98 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF Transceivers : Yaesu FT-891 Radio Equipment : HF Transceivers : Yaesu FT-991
  • FT991 MARS Mod - This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)
    [ Hits: 194 | Votes: 2 | Rating: 5.5 ]
Radio Equipment : VHF-UHF Amplifiers : TE Systems 1452G
  • Repairing a TE-Systems 1452G - Slides of a TE systems 1452 reparation including the schematic diagram of this monoband VHF RF Power amplifier
    [ Hits: 438 | Votes: 3 | Rating: 6.33 ]
Radio Scanning : Aeronautical
  • Frequences aeronautiques - Airband Frequencies collection in french PDF files by SWL FE10262
    [ Hits: 466 | Votes: 3 | Rating: 7 ]
Shopping and Services : Radio Equipment Repair
  • King Conversions - King Conversions has extensive experience in amplifier repair and conversion King Conversions specialize in converting HF amplifiers to operate as monoband amps on 50 MHz
    [ Hits: 228 | Votes: 0 | Rating: 0 ]
Software : Aircraft scatter
  • AirScout - Software for Aircraft Scatter Prediction. Extend your capabilities on VHF-/UHF-SHF bands even when you live in an unprivileged location and Calculate a propagation path between two stations and follow the aircrafts in real time
    [ Hits: 75 | Votes: 0 | Rating: 0 ]
Software : Circuit Design
  • mini Ring-Core-Calculator - Calculate windings on ferrite cores - The program can be used to calculate inductors (coils) and their number of turns on ferrite cores, ferrite shells and air coils. These can be used for baluns, Ununs, bandpass filters, low pass filters, resonant circuits, and more. The technical specifications of the cores are already integrated in the program. Application is free and runs on Windows 32 bit versions only. To make it run on Windows 10 64 bit need to be unzipped in a single folder.
    [ Hits: 185 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers
  • 100 Watt RF Power Amplifier for 2 GHz - Modification to an old cellular phone base station modules, with a fairly reduced output power (10 watts or so), the stock power amplifier modules will cover the 2.3 GHz and 2.4 GHz amateur radio bands.
    [ Hits: 98 | Votes: 0 | Rating: 0 ]
Technical Reference : Radio Frequency Interference
  • Build an All Band HF Air Core Choke Balun - The main function of the Ugly Balun is to help eliminate rf currents from flowing on the outside of coaxial cable using the principle of choke action.
    [ Hits: 298 | Votes: 1 | Rating: 10 ]
Technical Reference : Repeater
  • UV5R Cross Band Repeater Project - A project to build a cross band repeater using a pair of Baofeng UV5R handheld transceivers.
    [ Hits: 2313 | Votes: 9 | Rating: 5.89 ]

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