It's not actually SWR that kills PAs, but rather the resulting
over-voltage or over-current. With an open circuit load, the risk would
be mainly over-voltage, but whilst that would be a problem with a class
C PA, I'm not so sure that there is a big risk from class AB, push-pull,
ones.
A PA might survive a very high SWR for some loads, but be very fussy for
other ones.
--
David Woolley
On 16/03/2023 15:58, Ingo Meyer DK3RED wrote:
The KX3 should tolerate an SWR of 1.6:1. I have already unintentionally
transmitted with my KX3 (5W CW) without antenna and the KX3 is still in
good health. The manual says at page 6: "The KX3 reduces power if SWR is
high."
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