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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 11 Oct 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
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
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