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J Pole Antenna dimension calculator
The J Pole antenna is a simplified version of the Slim Jim antenna, using the same matching stub principle
post 29 Jan 2024
Antenna Calculator Links →
Types of Coax Cable and Line Loss
A quick line loss calculator to use note that the simple program used for this web page
VSWR calculator
Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values
VSWR Loss Calculator
This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR
VSWR to return loss conversion
Conversion tool for converting between VSWR, return loss and reflection coefficient
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A quick line loss calculator to use note that the simple program used for this web page
Enter VSWR, Reflection Coefficient, or Return Loss to calculate remaining values
This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR
Conversion tool for converting between VSWR, return loss and reflection coefficient
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