Comment on What type of feedline coax should I use for my antenna by Alex

Dear Michael

In most J-Pole calculator in Internet, the feedpoint location is based on 50 ohm coaxial cable.
May I know how to connect a J-Pole with my modern tuner with 75 ohm coaxial input or a vintage tuner with 300 ohm balance input? (most likely it should use 75 ohm coaxial cable as feedline with 1:1 balun and twin copper line cable)
In other words, grateful if you can advise how to calculate the feedpoint location of 75 ohm and 300 ohm in the matching part of 2 metes J-Pole/Slim Jim

Thank you for your attention.

Best Regards

from Mix ID 8229700


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