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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Heerlen Philips Factory 12ax7 Date Codes posted by vmazzone@fastmail.fm on December 27, 2014 at 13:03:22:
I believe this tube is from the Copenhagen factory. Both Copenhagen and Heerlen factories have utilise triangle symbol and sometimes its difficult to distinguish. The Copenhagen triangle is more equilateral. Heerlen is a right angle triangle. Also the welded long plates from early fifties suggests Copenhagen origin.
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Follow Ups
- RE: Heerlen Philips Factory 12ax7 Date Codes - rusiee 23:31:09 12/27/14 (2)
- RE: Heerlen Philips Factory 12ax7 Date Codes - vmazzone 08:07:29 12/28/14 (1)
- RE: Heerlen Philips Factory 12ax7 Date Codes - rusiee 10:16:57 12/28/14 (0)
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