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Sieman-Phillips 7308 and JAN Phillips 6922

Hi all. In comparing the two tubes innards, I noticed that they are identical as far as I can tell. Is it possible the JAN or the Sieman versions were rebranded? Are they the same tube possibly? They even sound similar. Thanks.
monjul

Showing 1 response by monjul

monjul OP
4 posts
 
Thanks. All I see on the tube is "D80", 7308/USA and a symbol that doesn't seem to cross-ref to the symbols in the tube codes.

My best guess would be that they were made in the 80's maybe?
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