Hep me identify this ECC83/12AX7.

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kleuck
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Hep me identify this ECC83/12AX7.

Postby kleuck » Tue 11/06/12 4:48 pm

Hello
I'm wondering what is this tube : Image
Image
Image
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.
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kleuck
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Postby kleuck » Wed 11/07/12 6:28 am

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)
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p_christov
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Postby p_christov » Thu 11/08/12 5:50 am

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
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kleuck
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Postby kleuck » Thu 11/08/12 7:34 am

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.
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p_christov
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Postby p_christov » Thu 11/08/12 9:02 am

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.
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kleuck
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Postby kleuck » Thu 11/08/12 9:32 am

On the pictures i find through Google, the pins in the glass are not so red, and shorter (half the height)
Anyway, a Tungsram.
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dotfret
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Postby dotfret » Mon 11/12/12 2:33 pm

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 ...
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