[Amps] Zero signal current 3CPX800A7

[Mike Schatzberg]

Hello Amp Fans:

I run a trio of 3CPX800A7.  Key down high voltage is about 3.2 KV, and zero 
signal at that time is about 250 mils.  This is about 80 mils per tube.
The amp is very clean, and will drive easily at these levels.  30 watts 
input produces about 1.5 KW PEP.

73 and Happy DXing,

Mike
W2AJI

---- Original Message ----- 
From: "Jim W7RY" <w7ry at arrl.net>
To: "Dennis W0JX" <w0jx at yahoo.com>; <ki6sz at sbcglobal.net>
Cc: "Amplifiers" <amps at contesting.com>
Sent: Saturday, April 04, 2009 9:44 PM
Subject: Re: [Amps] Zero signal current 3CPX800A7


>  15 + 15 = 30 ?
>
> I'm not sure when 15 + 15 = 60?  Or is the resting current 30 Ma per tube?
>
> :)
>
> 73
> Jim W7RY
>
>
>
>
>
> ----- Original Message ----- 
> From: "Dennis W0JX" <w0jx at yahoo.com>
> To: <ki6sz at sbcglobal.net>
> Cc: "Amplifiers" <amps at contesting.com>
> Sent: Saturday, April 04, 2009 3:21 PM
> Subject: [Amps] Zero signal current 3CPX800A7
>
>
>> Don: The zero signal current should be the same as the 3CX800A7.
>>
>> Here is a data sheet for a Svetlana 3CX800A7. The Penta data sheet gives
>> the same numer for SSB.
>>
>> The stated resting current is 15 ma each so that would be 60 ma for two
>> tubes. Nothing is listed in class AB2 for CW. At least the above is a
>> starting point. There are tube curves on the data sheet.
>>
>> My AL-800H has a built in EBS circuit, so my zero signal current is 0 ma.
>>
>> 73, Dennis W0JX/8
>> Milan, OH
>>
>>
>>
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