Hi Manny,
51pf of output capacity is very unlikely for such a small tube, it will be
not more then 10-15pf for sure
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Manuel R. Alonso / KC4MNE
Would it be feasable to build a 4 tube amplifier using the 4cx800 russian
tubes.
I calculated a plate impeadance of about 490 ohms, using (2600V 3.0 amp
supply)
However for a Pi output I am looking at a c1 value of about 100 pf at 29MHZ
and each tube has 51pf of capacitance already, if added together thats over
200pf. How is this obstacle corrected?
Manny
KC4MNE
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