[Amps] Quad Tube 4cx800 hf amp

[Bob Maser]

I tried that with a 3CX3000 amp and it didn't buy me much.

Bob
----- Original Message ----- 
From: "Will Matney" <craxd1 at verizon.net>
To: <amps at contesting.com>
Sent: Thursday, May 25, 2006 10:02 PM
Subject: Re: [Amps] Quad Tube 4cx800 hf amp


> Manny,
>
> You can add a small amount of inductance between the coupling caps and 
> Tune C to drop it thus making it a L-Pi circuit.
>
> Best,
>
> Will
>
> *********** REPLY SEPARATOR  ***********
>
> On 5/25/06 at 9:50 PM Manuel R. Alonso / KC4MNE wrote:
>
>>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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>
>
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