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07-06-2013, 11:13 AM

electroking electroking is offline

a- v- karma member

Join Date: Dec 2007

Location: Montreal (QC), Canada

Posts: 743

Dating is based on the following:

1 - Octal tubes were introduced in 1935-36.

2 - Metal tubes with top grid caps (6K7, 6Q7, etc.) were nearly obsolete
by about 1940-41.

Bye for now.

Audiokarma

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