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In Reply to: RE: My New NOS tubes are overheating I think posted by xti16 on December 20, 2014 at 04:53:00
You are correct, the suspect tube could be a type III which had red plating issues after the initial production (and the NATO war in the Balkans!).
Get a replacement tube! Don't use that one.
Follow Ups:
Hey Jim - How many versions of the Ei KT90 were there? I read somewhere they had a type IV.
The type III was made with two different getter patches (a.k.a. "pills") - one was round and the other was square. EveAnna Manley called them types III and IV, but since the shape of the getter was the only (and very minor) difference I regard them all as type IIIs.
Gotcha - Thanks for the update. One last question - was it the early or late production type III's that had the 'red plate' symptom?
Thanks
George
Later production. The problem began about the same time as the NATO intervention in the Balkans.
Thanks again Jim. You cleared up a lot for me
George
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