[AMPS] 3CPX-800A7

[Phil Clements]

>
>     I've been getting ready to build an amplifier using 2 3CX800A7 tubes,
> but have found a well known trader on the newsgroups, and eBay now selling
> 3CPX800A7 medical pulls. From what I can tell, the tubes are exactly the
> same, except the latter is rated for a higher plate voltage, and much higher
> plate current. The tube produces 6kW out with 320 watts of drive in typical
> operation as a cathode driven amplifier.
>     My question is, what kind of performance can I expect with less than 100
> watts of drive using it in a class AB amplifier? Does anyone have any
> experience with this tube? Maybe I can get by with just one tube.
>     Thanks for your input,
> Jim Smith, KQ6UV

I think you will find that the 6kw is a pulse rating only. This is a similar
situation to the old 4-1000-A versus the PR4-1000A.  There is no tube
made that I am aware of that will do 6kw key down with only 800 watts
plate dissipation for very long.

(((73)))
Phil, K5PC




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