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Antenna Aardpen
The main feature of this antenna is determined by its reverse operation compared to a conventional antenna due to a negative starting angle
post 10 Aug 2024
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A Cobwebb homebrew build
A Cobwebb homebrew build for 14-17-20-24-28 MHz
Antenna Loop reception 80m and 160m
Experimenting with loops and found them to be very good Rx antennas. They have a useful null and provide a wonderfull drop in noise to bring the DX in
HF antennas for high rise dwellers
If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you
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A Cobwebb homebrew build for 14-17-20-24-28 MHz
Experimenting with loops and found them to be very good Rx antennas. They have a useful null and provide a wonderfull drop in noise to bring the DX in
If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you
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