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In Reply to: RE: Does anyone know these tubes? posted by protube@googlemail.com on June 14, 2017 at 05:32:45
pic. 1,2. Euro, maybe French, or Czech Telam, Polam?
pic 3,4,5 could be RCA, Tungsol, Kenrad early versions all looked like that.
pic 6,7,8,9 Japanese Korean mostly likely Asian manufacture
10,11 most likely RCA,
12, Sylvania, USA made but try to find the etched number. GE also had tubes that looked like that but they were distinctly marked
Edits: 06/14/17Follow Ups:
do bottoms (inside pins) have any markings ?
cheers
Hello,
Sorry for the delayed answer.
I have locking about the numbers in glass bottom.
Tube pic 1 and 2: yes a number 7
Tube pic 3, 4 and 5: yes looks like a star with 2 lines and 2 dots,
Left tube with number 16, right tube with number 4. (see photo)
Tube pic 6 and 7: no number
Tube pic 8 and 9: no number
Tube pic 10 and 11: yes looks like a Z or N, number 22 between pins 1 and 9 (see photo)
Tube pic 12: no number
Best regards,
Heiko
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