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70cm-Longyagis
The elements have 10 mm, 8 mm or 6 mm diameter, because this is very uncritical and you get the expected datas! For the tuning let the radiator 2mm longer and cut for best SWR at 432 MHz
post 10 Sep 2024
Antenna for UHF VHF Links →
10 Euro dish with biquad feeder
The 10 euro satellite dish came with a LNB size adaptor such that 22mm copper water pipe could be used
2 meter VHF Antennas 7 elements and 10
2 meter VHF Antennas 7 elements and 10
2 Meter 5 Element Quad
I used EZNEC to model this antenna. I got the boom from a large UHF TV antenna that was 70 long
12 element zl speciale
154
The 10 euro satellite dish came with a LNB size adaptor such that 22mm copper water pipe could be used
2 meter VHF Antennas 7 elements and 10
I used EZNEC to model this antenna. I got the boom from a large UHF TV antenna that was 70 long
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