[Amps] Starting up a NEW Henry amp

[Rob Atkinson]

>If you try
>to use the internal auto tuner it will not tune properly as it tunes up at low
>power and the input impedance of the amp changes as the power increases.

Power level  should not affect the impedance of a load.  If it does,
then something is wrong.  A part may be heating up and changing value,
in which case the matching network should be fixed.  You should be
able to put a vswr analyzer on the amp input and see the R + X for
some frequency, and those values should hold for whatever drive power
you use on the same frequency.

73

Rob
K5UJ