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5 Element-Yagi fur 145 MHz
This site is intended to allow all DIY enthusiasts and newcomers a little insight into the antenna self-construction
post 06 May 2024
Antenna for UHF VHF Links →
Building UHF Antennas
His method of construction can be used on most UHF through "low" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands
Build a 2m 8db collinear for £20
I started to build the antenna by cutting four lengths of wire, the measurement is 38.75ins for a half wave 145mhz but I cut them at 39.75ins
Dipolo-Bazooka
Questa antenna, realizzata con cavo coassiale di 52 Ohm, coincide perfettamente con l'impedenza presente al connettore d'antenna
A Tree Friendly 2 Meter Halo Antenna
The antenna is in fact nothing else but a half wavelength dipole with the legs bent in the shape of a circle
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His method of construction can be used on most UHF through "low" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands
I started to build the antenna by cutting four lengths of wire, the measurement is 38.75ins for a half wave 145mhz but I cut them at 39.75ins
Questa antenna, realizzata con cavo coassiale di 52 Ohm, coincide perfettamente con l'impedenza presente al connettore d'antenna
The antenna is in fact nothing else but a half wavelength dipole with the legs bent in the shape of a circle
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