|[AMRadio] Tube ID|
ranchorobbo at gmail.com
Sun Feb 23 08:02:40 EST 2014
I think I'd measure the voltage at that tube's socket and stick a
known VR tube in there for that voltage and see what happens. But, my
knowledge is somewhat limited. I guess a VR tube with neon in it
would glow orange. 5651 and 5651A are miniature neon VR tubes I
think. 90C1 or 85A2?
On Sat, Feb 22, 2014 at 4:42 PM, Jim Wilhite <w5jo at brightok.net> wrote:
> 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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