[Amps] 3CPX vs 3CX tubes

[Steve Thompson]

Gudguyham at aol.com wrote:
> Hi, Does anyone know with any certainty the difference between a 3CPX and a  
> 3CX tube?  Checking the Eimac data in reference to a 3CPX800A7 vs a  3CX800A7 
> it shows that a 3CX800A7 and a 3CPX800A7 both can be used in linear  
> operation.  As far as the 3CPX1500A7 vs the 3CX1500A7 it does NOT show  usage of the 
> 3CPX in linear operation, therefore, could the 3CPX1500A7 be  substituted  into 
> an AL-1500 or similar amp without any caveats?  

We ran a 3CPX1500 in a 2m contest station for 15 years or so - it gave 
excellent linearity.

Steve