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Slim jim jpole
this calculator can be used to design a slim jim or a j pole antenna. the slim jim, can be a great portable roll up antenna, if made out of 300? or 450? ladder line twin feeder. a slim jim for 2m 145mhz will be 1.5 metres long, and 70cm 433mhz will be 0.5 metres. alternatively, for permanent installations, the copper tube
post 03 May 2024
Antenna Calculator Links →
A Simple Seven Element Yagi Antenna
calculate the dimensions for a seven element Yagi-Uda Antenna. Simply enter the freqency in Megahertz
RF Balun Calculator
The formula/equation for this RF Balun calculator is also mentioned. The calculator is for RF LC balun type
Calcolo di antenne dipolo verticale loop
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calculate the dimensions for a seven element Yagi-Uda Antenna. Simply enter the freqency in Megahertz
The formula/equation for this RF Balun calculator is also mentioned. The calculator is for RF LC balun type
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