[AMPS] 8877 test results.

[measures]

Unfortunately, one of the kaput tubes turned out be a YU-158 pull from an 
MRI amplifier.  The other tube is an 8877 (9228 date code, s/n HSZ 501) 
that repoortedly failed in an AL-1500.  At -6000v, the anode-grid leakage 
was 0uA. At +4000v anode-grid leakage was 10uA -  rapidly increasing at 
higher potentials.  

It is my opinion that  8877 s/n HSZ 501 probably died from gold boiling 
off of the grid.   

cheers

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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