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Antenna multibanda a L rovesciata
L rovesciata, e' fra le antenne, che ha il pregio di essere di una semplicita' estrema meno di cosi' si rinuncia all'antenna
post 19 May 2024
Antenna Multibands Links →
Un double dipole 14-21 Mhz
Very simple to manufacture, it is cut for the bands 14 and 21 MHz.
W3DZZ Trap Dipole
The W3DZZ Trap Dipole, multibands antenna
Windom baluns for kilowatt range
Windom balun made with Amidon ferrite toroids
Limited space multi-bands antenna
Configured as a dipole, the ATX whips appeared not to be long enough.A loaded dipole is more efficient if the loading coil is closer to the top of the antenna
Antena Bigode de Gato
156
Very simple to manufacture, it is cut for the bands 14 and 21 MHz.
The W3DZZ Trap Dipole, multibands antenna
Windom balun made with Amidon ferrite toroids
Configured as a dipole, the ATX whips appeared not to be long enough.A loaded dipole is more efficient if the loading coil is closer to the top of the antenna
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