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BLT tuner qrp station
I managed to find 2 indentical poly variable capacitors that checked out to range from 15 to 300 pf, and they even had 1/4" shafts for mounting knobs
post 05 Dec 2024
Antenna Transmatch tuner Links →
Z-Match Antenna Tuner
This Z-Match is a link coupled all-band tuner. Two all band tank circuits cover 3-14mhz and 14-30mhz. The tank output links are selected with a very heavy duty SPDT rotary switch
Z-match tuner
Andremo ad agire sul secondo condensatore resonance o c.v. 2 perportare i segnali ascoltati al massimo livello di livello s-meter e ritoccare poic.v. 1 sempre per il miglior risultato in ricezione
Balanced ATU
An ATU has the advantage of bringing the feeder-antenna system to resonance, act as a band pass filter both on receive and transmit and a low SWR
FT-817 2-Tuner
The capacitor had to be small, I had the choice of two, one of 140pf and one of 100pf, Ichose the latter, as neither the rotor or stator were grounded
The Balanced Universal ATU
It is possible with only two components of a LC circuit to build a symmetrical ATU without taps and coupling links
186
This Z-Match is a link coupled all-band tuner. Two all band tank circuits cover 3-14mhz and 14-30mhz. The tank output links are selected with a very heavy duty SPDT rotary switch
Andremo ad agire sul secondo condensatore resonance o c.v. 2 perportare i segnali ascoltati al massimo livello di livello s-meter e ritoccare poic.v. 1 sempre per il miglior risultato in ricezione
An ATU has the advantage of bringing the feeder-antenna system to resonance, act as a band pass filter both on receive and transmit and a low SWR
The capacitor had to be small, I had the choice of two, one of 140pf and one of 100pf, Ichose the latter, as neither the rotor or stator were grounded
It is possible with only two components of a LC circuit to build a symmetrical ATU without taps and coupling links
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