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Transmach 1.8 to 30 MHz designed for radio-amateur bands
The transmach, is designed for radio-amateur bands, it is recommended, although it does not appear in the circuit, to place a 2.5 mH radio frequency shock at the output
post 05 Dec 2024
Antenna Transmatch tuner Links →
Antenna tuner long-fil de 7 a 30 MHz
It is a simple L coupler that can be of great service for fixed or mobile traffic.
Antenna tuner multi-type matching system
The above antenna tuner is a multi-type matching system in the same box, which includes L - Pi and T networks. For example, If you can't matching a random antenna with PI-type tuner, just turn the S1 switch in other position, ie T-type and try again. With L - PI - T one-box antenna tuner , we have a very wide matching system for any kind of antenna
Antenna tuner T 3,5 a 30 MHz
This small coupler has a very classic T-pattern and uses an intermediate tap-type choke which allows tuning on all HF bands from 80m to 10m.
Antenna Tuning Unit ATU using the T-Network approch
A roller inductor with 25 or more turns of 1.2 mm diawire (No 17 AWG) on a 50 mm former would be nice for the 100 Watt level and would easily cover 160m through 10m operation
Icom tunner AH4 portable operation
Icom tunner AH4 with installation of the same for stationary or portable operation, making it easier to use
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It is a simple L coupler that can be of great service for fixed or mobile traffic.
The above antenna tuner is a multi-type matching system in the same box, which includes L - Pi and T networks. For example, If you can't matching a random antenna with PI-type tuner, just turn the S1 switch in other position, ie T-type and try again. With L - PI - T one-box antenna tuner , we have a very wide matching system for any kind of antenna
This small coupler has a very classic T-pattern and uses an intermediate tap-type choke which allows tuning on all HF bands from 80m to 10m.
A roller inductor with 25 or more turns of 1.2 mm diawire (No 17 AWG) on a 50 mm former would be nice for the 100 Watt level and would easily cover 160m through 10m operation
Icom tunner AH4 with installation of the same for stationary or portable operation, making it easier to use
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
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
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62