EL84 Micron

[V_amp]

Hello, this is my forst post!

My name is Fábio and recently I bought four NOS tubes EL84 MICRON.
I'm trying to find some information about these tubes, like origin, or who re-branded them.

Thanks very much!

FAB

[dotfret]

My notoriously dodgy memory says that Micron are usually rebranded Ei valves.
If they are from Ei, they might carry an "etched" code similar to a Philips group code - here is an example on a 12AX7 -



but the absence of a code might only indicate that the batch was produced for re-labelling - a common thing with Ei valves.

[V_amp]

Thanks Dotfret

I was thinking it was a Tungsram EL84 rebranded tube.

http://www.tubemonger.com/PhotoGallery. ... ctCode=599
and
http://ep.yimg.com/ip/I/thetubestore_2057_66088175

because there are a lot os similarities with mine like the little metal tab above the mica, and the flat connexion between the pins.

But I'm not sure yet.

FAB

[dotfret]

If they have that little tab with a number on it, they are almost certainly Tungsram.
You do find Tungsram valves without the tabs, which can be hard to identify.