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Questions about tubes and gear that glows. FAQ

RE: Not absolutely true.




Both tubes are genuine Telefunken.

Pic 1. On the left an ECC81 from 1955, on the right from 1952

Pic 2. Datecodes B.bf.01 and B.ur.01 june 1955 and august 1952

Pic 3. Diamond on the left tube, no diamond on the right tube.
Note the square getter on th 1952 tube


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