[CQ-Contest] Tube datasheet needed

[Karl-Heinz.Merscher@uvw.uni-bayreuth.de (Karl-Heinz Merscher)]

Hi,

does anybody own data sheets for the following tubes:

AMPEREX 3-500 ZG
TRITON 3-500 ZG

Where to get the data sheets?? It seems that the tubes are 
produced in russia or china ...

Who can help?

Charlie, DL6RDE/AA1KD    and    Xaver, DK4RM


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