Hep me identify this ECC83/12AX7.

[kleuck]

Hello
I'm wondering what is this tube :


It's labeled Haltron, i had a Mullard i63 once, but here, no code.
The plate looks like a "Phillips group" one, but i never saw before a bridged getter in this type of tube.
I think i remember some early Mullard with bridge getters, but not with these very long rods.

[kleuck]

Found : it's a "Siemens" made in RDA in the Lorenz plant and sold by RFT to Siemens, or directly to Haltron -as they often sold relabeled RFT- but the stamped square piece of metal was a "Siemens" feature.

http://www.elektor.fr/forum/forum/publi ... 5567.lynkx

(French)

[p_christov]

It's definitely a Tungsram tube - notice the large holes on the plates and the small plate with a number on the getter post.

Peter

[kleuck]

You are probably right, i find now a lot of pictures.
I asked F.Ibre why he identified these as Lorenz.

Edit : you may be right, but i'm no sure, the base and pins look different to me from the Tungsram i found on the Net.

[p_christov]

It's hard to mistake a Tungsram ECC83 tube - look also at the copper grid posts and how red is the part of the pins in the glass.

[kleuck]

On the pictures i find through Google, the pins in the glass are not so red, and shorter (half the height)
Anyway, a Tungsram.

[dotfret]

I have seen Tungsrams which don't have tags, but the tag almost definitely says Tungsram.

I have only seen one 12AX7 valve with that style metal tag which was not a Tungsram. It carried a Philips code for IBRAPE and was also labelled Haltron.

LOL the stuff y get on eBay ...