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I recently sat down and calibrated my antenna, going through the bands
and recording the antenna tuner settings required to reach 1:1 on all
the bands my rig can run.

I'm thinking about another calibration I'd like to perform with the
tuner bypassed, trying to determine where on the bands I can use the
antenna without a tuner and still be within a reasonable SWR range.

I am hoping to preserve the lifetime of my tubes and maximize the
power available to me.

My question is: what is an acceptable SWR range? I know that 1:1 is a
desirable SWR, but when does SWR become undesirable to the point that
it shortens the lives of my tubes?

I am using a Kenwood TS-520 and an MFJ Versa Tuner II.

Jack.
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Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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