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Folded Dipole Calculator
The impedance of this antenna is around 300 ohm, so you may want to use a transformer or a 1/4 long piece of 120 ohm coaxial cable to match this impedance to 50 ohm
post 05 Dec 2024
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The self-inductances are calculated
A variometer consists usually of two coaxial coils, connected in series, where the coils relative position can be varied in some way
7 element yagi-uda
With this JavaScript it is very easy and quick to calculate the dimensions of the Yagi-Uda antenna above.Enter the frequency in MegaHertz and press the button, the Yagi-Uda calculator will do the rest for
Log Periodic Dipole Array
Log Periodic Dipole Arrays, or LPDA is a directional antenna with relatively constant characteristics across it's wide frequency range
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A variometer consists usually of two coaxial coils, connected in series, where the coils relative position can be varied in some way
With this JavaScript it is very easy and quick to calculate the dimensions of the Yagi-Uda antenna above.Enter the frequency in MegaHertz and press the button, the Yagi-Uda calculator will do the rest for
Log Periodic Dipole Arrays, or LPDA is a directional antenna with relatively constant characteristics across it's wide frequency range
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