Phil,
It is perfectly OK to do that, but I believe you are being more
conservative than necessary. The KAT3 is designed to 'take it' and the
PAs of the K3 (either high power or low power) are also - if that were
not the case, there would be a big warning statement in the manual.
In general, Elecraft designs are on the conservative side and will
withstand normal operating without stress.
73,
Don W3FPR
Phil & Debbie Salas wrote:
"There is a huge electrical difference between switching an additional
inductor in series with the load (or a capacitor in parallel) than what
is commonly seen as "hot-switching" which results in the amplifier
seeing an open circuit until the relay closes. A very high RF voltage
will exist if the PA is operated into an open circuit.
During the tuner's tune cycle, the load is never open circuit to the PA,
and the resulting RF voltage is kept under control."
Don - Maybe my "hot switch" term was not accurate for this situation.
I think of hot switching as making sudden abrupt impedance changes at
the output of your radio or amplifier. In any case, it seems to me
that it would be less hard on the radio if you do this at 15 watts on
a 100 watt PA vs 5 watts on a 10 watt PA. But then, I could be wrong.
Phil - AD5X
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