I have a vernier on it. Maybe I exaggerated -- it's not all that bad, just different. It
is smooth. I just need to get used to it. A plus: the screen meter is very useful as a
tuning indicator!
On 11/8/2013 1:01 PM, N1BUG wrote:
Tuning is VERY touchy. You really have to have the loading right or the screen
current is
excessive in either direction.
None of my 4CX1000A or 4CX1500B amps were all that touchy, from 1.8 to 144 MHz.
Screen
current does vary with loading, from negative through zero to positive, but it
is a smooth
and easily controlled change provided the loading capacitor has some reasonable
rate of
adjustment. I prefer vacuum variables, but if using an air variable I put a
vernier drive
on it.
With vacuum variable tune and load caps in a pi network, I have no problem
going from band
to band by using logged presets. Of course the presets have to be changed if I
make any
change to the antenna system, and tuning needs to be verified if there is any
possibility
of weather conditions affecting the antenna (ice or snow).
73,
Paul N1BUG
--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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