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Magnetique 27-28 MHz
The critical part on this type of antenna always remains the variable tuning capacitor which is located at the hot spot of the antenna, zone where the impedance is the highest and the developed voltage very important
post 05 Dec 2024
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160mt riceiving loop antenna
Tune C1/C3 until impedance at connector is resistive at 1830
80/160m Small Receiving Loop
A small receiving loop helped; it has very deep nulls and made listening on 80 and 160 more pleasant
80m Frame Antenna
Cut the tubing into 900mm long pipes and drill 5 wire guides 3mm dia through it see drawing
A Crossed Field Loop Antenna for 3.5
This antenna is the latest form of CrossedField Antenna.The electromagnetic wavesare created within the small FieldInteraction Zone around the two
150
Tune C1/C3 until impedance at connector is resistive at 1830
A small receiving loop helped; it has very deep nulls and made listening on 80 and 160 more pleasant
Cut the tubing into 900mm long pipes and drill 5 wire guides 3mm dia through it see drawing
This antenna is the latest form of CrossedField Antenna.The electromagnetic wavesare created within the small FieldInteraction Zone around the two
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