OOPS I should have said 30 or 35 years ago.
>Date: Fri, 31 Mar 2006 14:01:17 -0500
>To: "Dr. David Kirkby" <email@example.com>, "firstname.lastname@example.org"
>From: Bill Fuqua <email@example.com>
>Subject: Re: [Amps] [Moon-net] 4CX250B in P-P 2m?
>I have two with a pair of 4CX250Bs. But they are in parallel not
>push-pull. There was an article in the Handbook using copper pipe to make
>a push pull amplifier 30 or 45 years ago. But those were the days of 1kW
>plate input limits.
>At 06:51 PM 3/31/2006 +0100, Dr. David Kirkby wrote:
>> > Hello guys
>> > Anyone knowing about a 2m kW amplifier in push-pull with 2x4CX250B?
>> > A friend of mine is asking....
>> > 73 de Ben
>> > _______________________________________________
>> > Moon-Net posting and subscription instructions are at
>>Yes, I know it would be *seriously* over-run. The maximum anode voltage
>>is 2 kV
>>and the maximum anode current per tube is 250 mW. So a pair of tubes
>>no more than 1 kW of input power.
>>So needless to say, even if the 2 kW is input rather than output, it is
>>2x over the tubes specs.
>>Or perhaps your fiend has found a way of getting 200% efficiency and so
>>2 kW out with only 1 kW in.
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