I'm contemplating a single 4CX350FJ (Cout = 7pF) amplifier for 250 watts on
HF
where the plate impedance, at 2200 volts, figures to be 5000 ohms
and requires a (total) plate C circa 15pF on 10 meters,
which makes for a rather hard to find (air variable) plate cap.
So, I thought what if I take two MC325M, 1KV caps (min C. 14pF)
with the contoured plates for nicer tuning, gang the shafts, and run
them in series
resulting in a theoretical min. C of 7 pF (plus strays naturally)
Does this make sense? Has it ever been done?
Yes, I'm aware of the 1uH plate L network kluge.
Or should I just add a second tube, run twice the power at half the
impedance,
and sidestep the whole situation?
Constructive thoughts or tangential comments both welcome! :-)
73 & Good morning,
Marv WC6W
http://qsl.net/wc6w/
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