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.
73
Bill wa4lav
At 06:51 PM 3/31/2006 +0100, Dr. David Kirkby wrote:
>SM6CKU 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
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> >
> >
>
>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
>should take
>no more than 1 kW of input power.
>
>So needless to say, even if the 2 kW is input rather than output, it is at
>least
>2x over the tubes specs.
>
>Or perhaps your fiend has found a way of getting 200% efficiency and so
>getting
>2 kW out with only 1 kW in.
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