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Antennas and Grounds for Apartments
Three typical antenna system used by apartment dwelliers,for some amateurs theerc is little or no possibility of getting permission to creet anoutside antenna
post 13 Aug 2024
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160m antenna for small lot
So i came up with this solution which, i must say, is not that bad when you consider the small footprint
80 Meter frame antenna
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
40 m short vertical
Antenna for restricted space also an invisible antenna
22-element 160m-6m Directional Array
Loaded 160m and full size 80m dipole. On 160m, a hairpin match is automatically activated to offset the lower resistance feedpoint due to the 80m loading coils
10m 20m Trap Dipole
Building an effective HF antenna can be difficult when space is limited. Maybe the full wave delta loop can help?
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So i came up with this solution which, i must say, is not that bad when you consider the small footprint
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
Antenna for restricted space also an invisible antenna
Loaded 160m and full size 80m dipole. On 160m, a hairpin match is automatically activated to offset the lower resistance feedpoint due to the 80m loading coils
Building an effective HF antenna can be difficult when space is limited. Maybe the full wave delta loop can help?
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