"Bob Glenn" wrote in message
ews.com...
On a typical 25 watt 2 meter setup, how much voltage would there be on
the end of a 1/4 antenna?

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25 watts into a 1/4-wave vertical antenna on 2 meters -

Base current about 0.82 amps into 37 ohms,

Volts about 160, measured (if you can) at top of antenna across about 1000
ohms.

Things vary slowly with length-to-diameter ratio of the antenna conductor.

As conductor diameter increases, volts at the end tend to decrease.
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Reg, G4FGQ