mode s

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mode s

788 links - and 14 categories

Antennas : 40M
  • NVI 40 Meter Antenna Modeling - The idea of using a low mount dipole, enhanced with reflector wires directly beneath the dipole, on the ground, appears to be a very good approach to creating an NVI specific antenna for local HF operation.
    [ Hits: 3004 | Votes: 0 | Rating: 0 ]
Antennas : Baluns : 1 to 1 Balun
  • A Cost Effective Current-mode 1:1 Balun - A cost effective current-mode 1:1 balun can be constructed from a length of coax and a rod typically used for a broadcast antenna loop-stick, some electrical tape, cable ties, a length of PVC water-pipe and some connectors.
    [ Hits: 9191 | Votes: 4 | Rating: 7.25 ]
Antennas : Baluns : 4 to 1 balun
  • The Guanella 1:4 balun - A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.
    [ Hits: 3636 | Votes: 1 | Rating: 10 ]
Antennas : Dipole
  • Folding the Dipole - The half wave dipole antenna is a simple and practical antenna model that consists of a half wavelength long centre fed conductor.
    [ Hits: 2377 | Votes: 4 | Rating: 7.5 ]
Antennas : Helical
  • Axial-Mode Helical Antennas - Turn Helical Antennas Over Perfect Ground and Modeling Helices in NEC-2
    [ Hits: 1985 | Votes: 4 | Rating: 1.75 ]
  • Axial-Mode Helical Antennas - Notes on Axial-Mode Helical Antennas in Amateur Service. Helix Basics, Modeling Issues, and Short Helical Antennas Over Perfect Ground
    [ Hits: 1651 | Votes: 0 | Rating: 0 ]
  • The normal-mode helix antenna - A helix will work in the normal mode when the diameter and pitch of the helix is less than 0.1 Lambda
    [ Hits: 3054 | Votes: 7 | Rating: 5 ]
Antennas : Portable Antennas : Traps Antennas : Windom
  • Windom Antenna with 4:1 balun - The Windom is an Off-center wire multiband Antenna. The old version was fed just by a single-wire connected on 1/3 of antenna's overall length or with an open-line feeder (later versions). Here is another model with coaxial feeder, which is compatible with Solid States - 50 Ohm output transceivers .
    [ Hits: 8025 | Votes: 9 | Rating: 6.89 ]
Internet and Radio : Video
  • The Ham Band - A music video describing the building of a modern contest station - it teaches you morse code at the same time! Musical styles change from French Musette to Viennese Walz to German Oompah and the musical key changes 25 times!
    [ Hits: 434 | Votes: 0 | Rating: 0 ]
Manufacturers : QRP Kits
  • Micro908 Kit - A re-usable control & computing platform for antenna measurement, PSK31 digital modems, audio filtering, signal source & VFO, memory keyer by AMQRP
    [ Hits: 1569 | Votes: 1 | Rating: 10 ]
Operating Modes : Mobile
  • Choking on RF - The intrepid newcomer encounters common mode problems in a mobile environment. Implementing some common mode chokes will be possible to reduce interferences
    [ Hits: 1128 | Votes: 1 | Rating: 1 ]
Operating Modes : Stealth Amateur Radio
  • G4ILO Stealth Amateur Radio - If you are a ham and live in a modern urban or suburban development, putting up a highly visible antenna may make it difficult to stay friends with your neighbours.
    [ Hits: 1561 | Votes: 2 | Rating: 10 ]
Radio Equipment : HF Amplifiers : Yaesu FL-2100
  • YAESU FL-2100Z Amplifier Repairs - The FL-2100Z amplifier referenced in the following images is the 6-Band model covering 10m thru 160m (no WARC bands) and not the 9-Band version that included the WARC bands. Modifications, schematics and manual
    [ Hits: 3477 | Votes: 8 | Rating: 7.25 ]
Radio Equipment : HF Transceivers : Kenwood TS-2000
  • Kenwood TS-2000 Review - The Kenwood TS-2000 All-Mode Multiband Transceiver review
    [ Hits: 1372 | Votes: 3 | Rating: 10 ]
Shopping and Services : Regional : Europe : UK
  • ZLP Electronics - Yaesu Icom Kenwood CAT Interfaces. Isolated audio-DATA interfaces for ALL afsk DATA modes inc psk31 rtty sstv etc.
    [ Hits: 1734 | Votes: 5 | Rating: 10 ]
Software : Antenna analysis
  • Yagi-logper - Yagi-logper is a linux GPL program to model a Yagi or Log-periodic antennas with horizontal cylindrical dipoles.
    [ Hits: 1684 | Votes: 3 | Rating: 7 ]
Software : RTTY
  • Fldigi - Fldigi Freeware Digital multi mode program for Linux, Free-BSD, MacOS X and MS Windows . Support CW and several digital modes like PSK31, MFSK, RTTY, Olivia, WeFax, Hell and others and is a fully multi platform application
    [ Hits: 17855 | Votes: 24 | Rating: 7.49 ]
Technical Reference : Audio

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