http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=489650186
The tube has no Philips etched code and on close examination of the
plate, I found that the shinny silver plate structure is very similar
to the Thomson Ministron 5687WA I got (an excellent tube). Furthermore,
it has a marking "12AU7WA" underneth on the tube which is also the same
as the Thomson 5687WA.
Is it really a Thomson?
Tim
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Before you buy.
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=510364693
I think this one is the real, better things. Note the plate structure
is different and gold pins. However, more expensive.
diytfy