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Groundplane Antennas at Various Heights
Back home I compared the roof mounted groundplane antenna with an identical model on top of my camper. The same story! The lower mounted antenna worked better!
post 04 Dec 2024
Antenna Vertical Links →
3_elementi_array
Essenzialmente, questa e' una singola antenna verticale a 1/4 d'onda con radiali a terra, complimentata da una coppia di verticali parassiti
7 band semi vertical trap antenna
The vertical section of their antenna is listed as 32'-6" high with a 7.00 MHz trap mounted at the top followed by 27'-6" of horizontal wire for 80m
1/4 Wave HF Multiband Vertical for 40 - 10 Meters
It consists of 3 sections of thick wall PVC connected together and may be self supporting
80/40m Vertical
The HF2, is about 30ft long, and has an L/C band switching arrangement near the base. This L/C circuit consists of two coils in series
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Essenzialmente, questa e' una singola antenna verticale a 1/4 d'onda con radiali a terra, complimentata da una coppia di verticali parassiti
The vertical section of their antenna is listed as 32'-6" high with a 7.00 MHz trap mounted at the top followed by 27'-6" of horizontal wire for 80m
It consists of 3 sections of thick wall PVC connected together and may be self supporting
The HF2, is about 30ft long, and has an L/C band switching arrangement near the base. This L/C circuit consists of two coils in series
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