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The SPC antenna tuner
The nominal values from the article are: C1, 200 pF; C2, 200 pF per section; L1, 28 microhenries, roller inductor
post 05 Dec 2024
Antenna Transmatch tuner Links →
Legacy Balanced Antenna Tuner
The balanced tuner described in this article has two front-panel adjustments, a turns counter that turns two roller inductors that is connected together with two pulleys and a timing belt and a high voltage capacitor
L Network Tuner
The L-Network tuner is a simple impedance matching network that consists of one variable inductor and one variable capacitor
Motorized L-Network Antenna Tuning
I needed a remote antenna coupler that would match the antenna on any frequency from 1.8 to 29.7 MHz including oddball military frequencies
Remote ATU
For the variable capacity, I choose an arithmetic progression of capacity with 8 relays, starting from xx pF up to yy pF for the highest capacity. The four smallest capacitors are made of short sections of RG-174/U coaxial cable
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The balanced tuner described in this article has two front-panel adjustments, a turns counter that turns two roller inductors that is connected together with two pulleys and a timing belt and a high voltage capacitor
The L-Network tuner is a simple impedance matching network that consists of one variable inductor and one variable capacitor
I needed a remote antenna coupler that would match the antenna on any frequency from 1.8 to 29.7 MHz including oddball military frequencies
For the variable capacity, I choose an arithmetic progression of capacity with 8 relays, starting from xx pF up to yy pF for the highest capacity. The four smallest capacitors are made of short sections of RG-174/U coaxial cable
Antenna splitter per VHF-UHF per quattro ricevitori Chi dispone di una sola antenna e vuole collegarvi più di un ricevitore necessità di uno splitter
Amateur radio kits by Kanga US
50MHz to 28MHz RX Converter The concept of the rx converter is quite simple and nothing really new. the local oscillator is a standard colpitts crystal oscillator producing the 22mhz lo signal