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50 mhz halo antenna horizontally polarized
The basic horizontally polarized antenna is a half-wave dipole. It has a radiation pattern that exhibits lobes and sharp nulls
post 26 May 2024
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2 meter halo antenna
The antenna I show here is my third generation design. The goal for this next design was to build something that I could get a good SWR
Project 2m Halo for 144 MHz
Polarisation is horizontal while the radiation pattern is omnidirectional
4m Halo Antenna
Using aluminium tubes from 4 and 6 mm The boom (H) is made with an aluminium profile 10/10 mm square section
50MHz halo Antenna for mobile
Six Metre halo be centred on 50.125 MHz so that it can work efficiently in the DX segment of the band but will still be effective on 50.150 MHz and above
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The antenna I show here is my third generation design. The goal for this next design was to build something that I could get a good SWR
Polarisation is horizontal while the radiation pattern is omnidirectional
Using aluminium tubes from 4 and 6 mm The boom (H) is made with an aluminium profile 10/10 mm square section
Six Metre halo be centred on 50.125 MHz so that it can work efficiently in the DX segment of the band but will still be effective on 50.150 MHz and above
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