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Accordatore per RTX QRP
Accordatore concepito per uso portatile a bassa potenza
post 17 Sep 2024
Antenna Transmatch tuner Links →
Z-match tuner for ft817
I chose to use the dual balanced output link configuration suggested by Mr. Lofgren. One link is a low impedance, the other a high impedance
Z-Match Antenna Tuner 100 watt
The variable capacitors mustbe insulated fromground, thereforemount both capacitorson a piece ofsingle-sided circuit-or perf-board that is cutjust wide enough to fit into thealuminum case
Z-match ATU covering 160m - 10m
I put up a homebrew 40m coaxial dipole which wouldn’t even give me a good SWR on 40m! I looked around for an appropriate ATU circuit to build
End Fed Half Wave Tuner Kit
The two transformers that need to be wound, one on toroid and the other on a binocular core, were pretty easy, and anyone who has wound inductors before will have no problem
Z-Match, un circuito da riscoprire
L'originalita' dell'idea consiste nell'usare due circuiti accordati, in parallelo, che lavorano su frequenze diverse, eliminando la necessita' di induttanze tipo roller o con prese commutabili
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I chose to use the dual balanced output link configuration suggested by Mr. Lofgren. One link is a low impedance, the other a high impedance
The variable capacitors mustbe insulated fromground, thereforemount both capacitorson a piece ofsingle-sided circuit-or perf-board that is cutjust wide enough to fit into thealuminum case
I put up a homebrew 40m coaxial dipole which wouldn’t even give me a good SWR on 40m! I looked around for an appropriate ATU circuit to build
The two transformers that need to be wound, one on toroid and the other on a binocular core, were pretty easy, and anyone who has wound inductors before will have no problem
L'originalita' dell'idea consiste nell'usare due circuiti accordati, in parallelo, che lavorano su frequenze diverse, eliminando la necessita' di induttanze tipo roller o con prese commutabili
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground