220 band9 links
- Tri-Band J-Pole
- This strange looking antenna is a combination of Coupled-Resonator principle by K9AY and a quarter stubs to achieve low angle radiation pattern. Designed with 4nec2 NEC based antenna modeler and optimizer for 145/220/440MHz bands
[ Hits: 1227 | Votes: 3 | Rating: 10.00 ]
- 3 band J-Pole Antenna
- Pictures of a 2 meter, 220, 440 copper J-Pole antennas
[ Hits: 1856 | Votes: 8 | Rating: 5.62 ]
- The Ventenna
- Rugged, disguised 2m, 220MHz, 440MHz, and 2m/440 dual band antennas, HF portable antennas, portable dipoles.
[ Hits: 4375 | Votes: 18 | Rating: 8.55 ]
- Low Frequency Transmission Modes
- Article by W1TAG on operating modes used on low-banding.
The 2200 meter band (135.7 - 137.8 kHz) is only 2.1 kHz wide, so voice work on SSB or AM is out. Find out the best modes on LF
[ Hits: 361 | Votes: 0 | Rating: 0.00 ]
- IC-2720H Extended TX/RX Mod
- IC-2720H it will receive fine on 220MHz amateur band, but will NOT transmit there
[ Hits: 2128 | Votes: 7 | Rating: 7.57 ]
- SB220 SB221 arcing problems improvements mods
- This article explores the claim an amplifier might arc from a parasitic oscillation, damaging capacitors, bandswitches, or other components.
[ Hits: 1228 | Votes: 2 | Rating: 10.00 ]
- 137.7kHz QRSS on one chip
- This article describes a simple QRSS beacon exciter for the DX portion of the 2200m amateur band.
[ Hits: 446 | Votes: 0 | Rating: 0.00 ]
- 137 kHz antenna preamplifier
- A simple 137 kHz antenna preamplifier to make your FT-817 (and others) useable on 2200m band.
[ Hits: 922 | Votes: 3 | Rating: 6.67 ]
- Cross Band Repeaters
- Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.
[ Hits: 82 | Votes: 0 | Rating: 0.00 ]
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