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Icom tunner AH4 portable operation


Icom tunner AH4 portable operation

Icom tunner AH4 with installation of the same for stationary or portable operation, making it easier to use

post 05 Dec 2024


Antenna Transmatch tuner Links

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Antenna tuner 150 watts
A tunner witha balun T200-6 should give a better Q but the T200-2 was in stock and gave me sufficient tuning range, the capacitors are radio types and can be used up to 150 Watts

Z-Match Portable Antenna Tuner
I built the Z-Match in about 3-4 days using available parts. decided I wanted to use my Z-Match for 7-21 Mhz operation so I adjusted the coil L1 to give me that range

50 MHz 6 Meter Tuner Circuits
After matching my antenna to a 1.0:1 SWR I measured the capacitor settings: 77pF on the TX side and 36pF on the antenna side

A QRP Transmatch ATU
The inductor, the tricky thing in matching units with variable inductance. For the body I found an old pill container with a diameter of 4cm. The coil is then wound on this with 60 windings of 1mm enameled copper wire

Z-Match Antenna for high performance
For most applications, a capacity of 350 pF for C1 and 2x230 pF for C2 is sufficient, if you want to cover the bands 10-80 m, an extension for 160 m will be presented later


Antenna splitter per VHF-UHF per quattro ricevitori

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

Kits and Components

Amateur radio kits by Kanga US

50MHz to 28MHz RX Converter

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