Help me identify this label on tubes

I have a 6CG7 tube that has a label on the glass that says SENCORE.

I can’t seem to find anything on this tube. I find see tube testers called Sencore, but no tubes.
there are no other labels on the tube.

last_lemming01-17-2021 5:17am

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oldhvymec Details Discussions Posts This discussion 5,101 posts 01-17-2021 at 10:22pm Copy Comment URL Report Comment Edit Delete Sencore, use to be a pretty good source for test equipment. A lot of the older test equipment had valves.. Medical to space travel. Does it have an "Old" look and feel? Does it have the "Buck Rodgers" look? Loved that rocket! Tubes all over the place inside the ship.. Vacuum tubes in the vacuum of space... Will that work? https://frank.pocnet.net/sheets/127/6/6CG7.pdf Anyways.. Old / New? 6GC7. 6 volt, Glass, lost me after that.. C7? no Idea.. Tube historians can chime in.. That's all I got.. :-) Regards
last_lemming OP Details Discussions Posts This discussion Message User 638 posts 01-17-2021 at 02:45pm Copy Comment URL Report Comment Edit Delete Thanks! It would appear it has a 188 code, so it is a GE tube.
elliottbnewcombjr Details Discussions Posts This discussion Message User 5,363 posts 01-17-2021 at 11:31am Copy Comment URL Report Comment Edit Delete Many companies ordered tubes from tube makers with their name printed on them, hard to know who actually made the tube. https://audiokarma.org/forums/index.php?threads/did-fisher-make-their-own-tubes.617033/ Sometimes a code can get you to the actual tube manufacturer https://www.vivatubes.com/identifying-vintage-nos-vacuum-tubes-by-brand-country-and-eia-code/

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