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RE: Does anyone know these tubes?

Posted by protube@googlemail.com on June 14, 2017 at 05:36:00:

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.

pic 12
Probably a 12AU7, special plate construction.
On the tube is very difficult "CANADA" readable.