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Un moderno accoppiatore variabile per bobine
Un sistema pratico, economico e funzionale per realizzare un accoppiatore variabile per bobine, già usato nella radio a reazione presente nel sito, consiste nell’utilizzare un tubetto vuoto di colla per ufficio
post 05 Dec 2024
Antenna Transmatch tuner Links →
Emtech ZM-2 Antenna Tuner Kit
With the ZM-2, a tuning solution quite close to optimum can be found without even transmitting, just by listening for a peak in receiver noise
End-Fed Half-Wave Antenna & Tuner
The radiator itself is simply a half-wave long piece of wire. I used an unzipped length of zip cord, a full free-space half wave length about 41.6 metres
EZ-Tuner Site
EZ-Tuner is a shielded RF compartment which contains two Cardwell-Johnson 3500V variable capacitors, two 50pF/5kV
Gotta Match
I found that the Ultimate Transmatch is not as good at suppressing harmonics as the SPC so I decided on the SPC Transmatch
HF P-Greco Transmatch
Transmatch Hf che permette di utilizzare una grossa doppia filare
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With the ZM-2, a tuning solution quite close to optimum can be found without even transmitting, just by listening for a peak in receiver noise
The radiator itself is simply a half-wave long piece of wire. I used an unzipped length of zip cord, a full free-space half wave length about 41.6 metres
EZ-Tuner is a shielded RF compartment which contains two Cardwell-Johnson 3500V variable capacitors, two 50pF/5kV
I found that the Ultimate Transmatch is not as good at suppressing harmonics as the SPC so I decided on the SPC Transmatch
Transmatch Hf che permette di utilizzare una grossa doppia filare
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62
RF Inductance Calculator Mean diameter of the air core coil, measured from conductor centre to conductor centre include the wire insulation thickness, if any
Voice Recorder Gestito dall'integrato in questione ed offre la possibilità di registrare più messaggi per una durata massima di un minuto con buona fedeltà di riproduzione