220 band

14 links

Tri-Band J-Pole - AF6SA
This strange looking antenna is a combination of Coupled Resonator principle by K9AY and a ...

[ Hits: 1923 | Votes: 5 | Rating: 9 ]
3 band J-Pole Antenna - VE3BTC
Pictures of a 2 meter, 220, 440 copper J-Pole antennas

[ Hits: 2612 | Votes: 12 | Rating: 6.08 ]
Multiband J-Pole Antenna by IZ0UPS - iz0ups
A multiband J Pole antenna project that cover 144 220 and 430 MHz The articles ...

[ Hits: 416 | Votes: 4 | Rating: 7.25 ]

Tri-Band VHF/UHF Antenna Design - WB6IQN
The TBJ 1 a triband base antenna was published in March 2017 QST This antenna ...

[ Hits: 214 | Votes: 0 | Rating: 0 ]

The Ventenna - Mark Forbes KC9C
Rugged disguised 2m 220MHz 440MHz and 2m 440 dual band antennas HF portable antennas portable ...

[ Hits: 4581 | Votes: 19 | Rating: 8.21 ]

Low Frequency Transmission Modes
Article by W1TAG on operating modes used on low banding The 2200 meter band 135 ...

[ Hits: 438 | Votes: 0 | Rating: 0 ]

Propagation on 630 Meters and 2200 Meters - K9LA
This is a theoretical look at propagation on 630 Meters and 2200 Meters using ray ...

[ Hits: 39 | Votes: 1 | Rating: 10 ]

IC-2720H Extended TX/RX Mod
IC 2720H it will receive fine on 220MHz amateur band but will NOT transmit there ...

[ Hits: 2307 | Votes: 8 | Rating: 7.87 ]

SB220 SB221 arcing problems improvements mods
This article explores the claim an amplifier might arc from a parasitic oscillation damaging capacitors ...

[ Hits: 1309 | Votes: 2 | Rating: 10 ]

137.7kHz QRSS on one chip
This article describes a simple QRSS beacon exciter for the DX portion of the 2200m ...

[ Hits: 598 | Votes: 0 | Rating: 0 ]

137 kHz antenna preamplifier
A simple 137 kHz antenna preamplifier to make your FT 817 and others useable on ...

[ Hits: 1184 | Votes: 3 | Rating: 6.67 ]

Cross Band Repeaters - W9SM
Crossband Repeating is a process where a Ham transmits one signal on one band typically ...

[ Hits: 207 | Votes: 0 | Rating: 0 ]

70cm Mini Transverter - VK4ADC
A low cost low power microwave transverter so that you can operate easily on 70cm ...

[ Hits: 395 | Votes: 0 | Rating: 0 ]
70cm Mini-Transverter Project - VK4ADC
The project in this article illustrates how to do this in a simple and low ...

[ Hits: 254 | Votes: 2 | Rating: 9 ]