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50MHz Halo Antenna for mobile
This antenna was designed for operation on 52.05MHz
post 09 Aug 2024
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144 MHz halo antenna
Un dipolo fullsize ripiegato, omnidirezionale polarizzazione orizzontale, diametro 32 Cm, larghezza di Banda
A 144 MHz halo
This halo antenna was built to have an omnidirectional coverage while working in VHF contests
A 144 MHz halo
Si tratta di un dipolo a λ/2 richiuso a forma di cerchio,con gli estremi distanziati fra loro,e alimentato tramite Gamma Match
144 MHz Halo Antenna
2 meter Halo antennas I built, a horizontally polarized antenna for a 144 MHz WSPR propagation study and planned to stack these to increase omnidirectional gain
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Un dipolo fullsize ripiegato, omnidirezionale polarizzazione orizzontale, diametro 32 Cm, larghezza di Banda
This halo antenna was built to have an omnidirectional coverage while working in VHF contests
Si tratta di un dipolo a λ/2 richiuso a forma di cerchio,con gli estremi distanziati fra loro,e alimentato tramite Gamma Match
2 meter Halo antennas I built, a horizontally polarized antenna for a 144 MHz WSPR propagation study and planned to stack these to increase omnidirectional gain
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