|[AMRadio] Tube ID|
w5jo at brightok.net
Sat Feb 22 17:42:28 EST 2014
I have a voltage regulator that is not marked except for the following: 816B997. In circuit it glows bright orange.
My memory fails me at the moment, is it an OA2? It is a 7 pin miniature tube.
The OB2 glows a purple color but I forget what color the OA2 glows, or for that matter what this tube may be if not an OA2.
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