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[Amps] Quad Tube 4cx800 hf amp

To: <amps@contesting.com>
Subject: [Amps] Quad Tube 4cx800 hf amp
From: "Manuel R. Alonso / KC4MNE" <kc4mne@bellsouth.net>
Date: Thu, 25 May 2006 21:50:14 -0400
List-post: <mailto:amps@contesting.com>
Hello

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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