[Amps] RE : Quad Tube 4cx800 hf amp

[hermans]

Leaf the  the filament ON, and dont feed or connect the
Anode..............nor the grid.
It will be a nice looking AMP !!!

73 Jos 
ON4KJ/OS5N

-----Message d'origine-----
De : amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] De la
part de Manuel R. Alonso / KC4MNE
Envoyé : vendredi 26 mai 2006 2:50
À : amps at contesting.com
Objet : [Amps] Quad Tube 4cx800 hf amp


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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