Glod, I know yours is an old message but I must ask something...
I have this Mullard-branded 6SN7GT the manufacturer of which has been a mystery to me. See photo. It can't be Mullard-made because they apparently never made any 6SN7GTs.
Then I found this photo on the natubes site. This Tungsram-branded 6SN7GT is exactly like my Mullard-branded one. Next I read this:
Quote:
Your description of the tube fits very well (except the base color). This makes me think that also my Mullard-branded tube was in fact made by British Tungsram, or the Tottenham factory when it wasn't owned by Tungsram anymore.
What do you think? I'd be delighted to see a photo of one of your CV1988s with the KB/T stamp if you could provide one.
I have this Mullard-branded 6SN7GT the manufacturer of which has been a mystery to me. See photo. It can't be Mullard-made because they apparently never made any 6SN7GTs.
Then I found this photo on the natubes site. This Tungsram-branded 6SN7GT is exactly like my Mullard-branded one. Next I read this:
Quote:
Originally Posted by Glod /img/forum/go_quote.gif Interestingly, the Tungsram CV1988’s I have, have grey coating to the top mica, brown (micanol?) bases and black, staggered, ladder-ridged-flat-plates. The micas are racetrack formed, and the top one, with spikes at the round parts, touching the glass. Barely visible bottom getter. They are also stamped 6SN7GT (note not GTY). The base is without print, but the envelope is marked with the KB/T stamp with arrow, which means government ordered, approved, made to specification K1001 or K1006 and manufactured by Tungsram, Tottenham. |
Your description of the tube fits very well (except the base color). This makes me think that also my Mullard-branded tube was in fact made by British Tungsram, or the Tottenham factory when it wasn't owned by Tungsram anymore.
What do you think? I'd be delighted to see a photo of one of your CV1988s with the KB/T stamp if you could provide one.