43 Foot Vertical and Coax Switches

Furthering the discussion of the 43 foot vertical antenna I wanted to report a concern I have with this antenna and the use of any relay based coax switch.

If you install a 43 foot vertical in your back yard, route the coax through a switch and handle the tuning inside your ham shack, you need to ensure you do not exceed the voltage or current limits of the relays in the switch.

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SWR vs. Return Loss

If you are fortunate enough to have equipment to measure return loss of your antenna system here is a chart that will convert the return loss in dB to SWR…

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