Questions about tubes and gear that glows. FAQ
In Reply to: Help with Mullard CV4004 Date code posted by oldngrumpy on March 4, 2017 at 14:38:49:
The "KQDD/K" code was the very latest production/factory code used for Mullard CV4004 tubes.
These tubes where produced from the late 70s till mid 80s.
So yours are from week 3 of december (K) '83, and the CV4004 label was added in week 18 of 1984.
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Topic - Help with Mullard CV4004 Date code - oldngrumpy 14:38:49 03/04/17 (5)
- RE: Help with Mullard CV4004 Date code - oldngrumpy 10:42:17 03/06/17 (0)
- RE: Help with Mullard CV4004 Date code - BBoterham 16:08:42 03/04/17 (3)Follow Ups