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Antenna hf multibanda tipo RYBAKOV
L'anntenna puo' essere usata su tutte le bande HF con buoni risultati usando un accordatore esterno o un apparato con accordatore automatico
post 16 Sep 2024
Antenna Vertical Links →
10 mt wire jpole
Radiator 14 or 18 gauge strander copper 16.5 feet
20 mt wire Jpole vertival end feed
Same as dipole advantage is omindirectional pattern and low angle radiation when hauled up high
20-Meter J Pole Vertical
The J pole vertical is built from a fifty-foot TV push up mast
40/15M band sloper
The tower guy wires could be used as additional antenna radiators. The antenna that most suited this application was a 40m band sloper as the guy wire to be used was slightly longer than a 1/4 wave length at 7 MHz
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Radiator 14 or 18 gauge strander copper 16.5 feet
Same as dipole advantage is omindirectional pattern and low angle radiation when hauled up high
The J pole vertical is built from a fifty-foot TV push up mast
The tower guy wires could be used as additional antenna radiators. The antenna that most suited this application was a 40m band sloper as the guy wire to be used was slightly longer than a 1/4 wave length at 7 MHz
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
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground