Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Ei KT90 Question posted by Zedguy on October 20, 2016 at 19:21:30:
It is definitely not type 1 or 2.
Looks like type 3 due to "wing" structure where the two anode halves join.
Look for a silver metal square or circle on one side (without the square holes) of the anode plates. If it is square, it is type 3 prewar. If it is circular, it is type 4 post war.
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- RE: Ei KT90 Question - Mendel 07:08:58 10/21/16 (0)