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End Fed Half Wave Antenna Tuner
The main advantage of the EFHWA is that it does not have any feedline. No feedline means no feedline loss
post 05 Dec 2024
Antenna Transmatch tuner Links →
A single-coil Z-Match type
One of my first structures was with two plastic varicaps. Types that were in portable AM radios. Although intended for QRP, they often proved suitable for even 100 W if the impedance to be adjusted was not too high
A Tiny Z-match Tuner portable
A compact Z-match tuner for usage for in operation portable
A Homebrew Antenna Tuner
I decided to build a homebrew antenna tuner because I needed a passive pre-selector network to match an experimental end-fed wire antenna to my QS1R SDR receiver
Accordatore d' antenna a copertura continua
Un accordatore a copertura continua. Rispetto alla bobina classica con le prese commutabili il vantaggio di una induttanza variabile roller consiste nel fatto che l' accordo e' piu' preciso
A simple 10w qrp z-match 80-10m
Easily connect both symmetrical and unbalanced antennas from 80 to 10 m
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One of my first structures was with two plastic varicaps. Types that were in portable AM radios. Although intended for QRP, they often proved suitable for even 100 W if the impedance to be adjusted was not too high
A compact Z-match tuner for usage for in operation portable
I decided to build a homebrew antenna tuner because I needed a passive pre-selector network to match an experimental end-fed wire antenna to my QS1R SDR receiver
Un accordatore a copertura continua. Rispetto alla bobina classica con le prese commutabili il vantaggio di una induttanza variabile roller consiste nel fatto che l' accordo e' piu' preciso
Easily connect both symmetrical and unbalanced antennas from 80 to 10 m
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