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Slim jim antenna project
The Slim Jim is a vertically polarized omnidirectional end-fed antenna having considerable gain
post 29 Jan 2024
Antenna jpole Links →
144/440 MHZ copper J-POLE antenna
This antenna is built almost entirely of hardware store items with the exception of thr feedpoint connector and works as well or better than most commercial
450 Ohm Ladder Line J-Pole For 144 & 440 MHz
The best part about it is that it can be used on 2m and 70cm and it is cheep and easy to build
A VHF UHF Dual-Band J.pole
The J-Pole has no ground radials and it is easy to construct using inexpensive materials. For its simplicity and small size, it offers excellent performance
435 MHz J-Pole Antenna
80
This antenna is built almost entirely of hardware store items with the exception of thr feedpoint connector and works as well or better than most commercial
The best part about it is that it can be used on 2m and 70cm and it is cheep and easy to build
The J-Pole has no ground radials and it is easy to construct using inexpensive materials. For its simplicity and small size, it offers excellent performance
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