JDer8745 wrote:
Someone sed:

"I always hear and read that a high SWR can destroy the PA final of TX,
cranck coils, etc."

I've always heard that too. And I always heard that if you break a mirror,
you'll have seven years bad luck.

A high SWR can indeed destroy unprotected solid-state finals by causing
over-current and/or over-voltage. If finals cannot be damaged by the
impedance mismatch accompanying a high SWR, why do the transceiver
manufacturers waste money on protection circuitry? Of course, a tuning
network between the final and the feedline will usually alleviate the
problem through matching.
--
73, Cecil http://www.qsl.net/w5dxp



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