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My name is Heiko, i am german and a new member on audioasylum.
Sorry for my simple english, but i hope i can improve tread by tread ;-)
I like tubes and vintage electronics.
Actually i hear with Marantz from the 70s.
Furthermore some tube amplifier for example with russian triode 6C33C.
I repair my equipment mostly herself and built and create some tube circuits.
In my private stock i have a lot of tubes.
Now my problem.
I have some tubes (probably all produced in USA or Canada) but i don't know how manufactorys it is.
Therefore i take pictures of this tubes and give little further informations, what visible to see for me.
The last owner remove the label. 2 tubes are reprinted (the type is real and ok, but is changed in european type equivalent).
I hope anyone could help me to identify the manufactory.
Thank you, very much !
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
do bottoms (inside pins) have any markings ?
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
pic 1 and 2:
prob. loglive 12AU7 (E82CC) with triple mica, grey plates with 3 holes and a halo getter
pic 3, 4 and 5
2 tubes 12AU7 label in same construction. On both tubes are the "OK" visible.
On the left tubes is a red/orange print maybe "HP".
On the right tube is a yellow print, "Made in Japan" is readable.
Both tubes with D square horseshoe getter construction.
pic 6 and 7
12AU7 ECC82 print and a D square horseshoe getter construction.
pic 8 and 9
ECC82 (reprint). This tube have not a clear glass, little rough.
This tube also with a angled D square horseshoe getter construction.
pic 10 and 11
12AU7 label, black plates and a angled D square horseshoe getter construction.
Probably a 12AU7, special plate construction.
On the tube is very difficult "CANADA" readable.
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