German black plate 12AX7?

[rockon1]

Slightly different plate construction than any other BP's I own.Has Ultron Germany on it and ECC83 12AX7 in a square on the other side. Thoughts? Thanks Bob




http://i12.tinypic.com/66emmu9.jpg

[Timbre Wolf]

I don't think it is truly German origin, but I can't be conclusive. Most black-plates are from America. I can't quite tell what's unique about that tube's innards - looks like very early RCA style plates that sort of bulge on the sides of your face-on view. But the number of holes is wrong - 4, instead of 2. The getter wire looks like Ken-Rad's horseshoe style, from what I can see.

You like it?

How 'bout a view of the top mica, getter wire, and print?

- Thom

[rockon1]

If you look at the sides of the plates there is actually two pieces of metal. One ends right at the bump near the bottom and top. I have not seen this in a BP before. The getter is hard to see at this angle . Its more of a rectangular shape. I'll try and get a pic of the top. Havent tried it yet. Bob

[rockon1]

More pics...


http://i14.tinypic.com/6h3usm0.jpg

[rockon1]

http://i9.tinypic.com/6gdr09i.jpganother...

[Timbre Wolf]

'50s Lorenz? Here's a '60s, from Tubemonger's great Library:

http://www.tubemongerlib.com/gallery2/d/8587-1/Lorenz++ECC83+1960s+Tall+Plate+Silver+Supports+2+-+Stuttgart+Germany.jpg

[rockon1]

Hmmm. The plate construction is virtually identical and they are German. Might be an earlier offering. Good find! I forgot to peruse the TM library. Bob

[Timbre Wolf]

peruse the TM library
I'm ever grateful to Tubemonger for the resource.

- T

[teleman1]

Not a Telefunken rebrand?

[Timbre Wolf]

Not a Telefunken rebrand?
Black-plate Telefunken? Now that'd be a $500 tube, if it ever existed.

- T