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Does anyone know when the Blackburn, UK Mullard manufacturing plant ceased tube production and closed for good?
Follow Ups:
Around 1985. I know the latest "B" Blackburn codes I ever saw were 1984 or so. As for their other plants, I know they rolled out those (IMHO) JUNK '80s vintage milspec ECC83/CV4004 boxplates coded KQ/QDD (or whatever code-- I only like the 1960s and 1970s CV4004s-- I'm not sure how Mullard screwed that tube up SO BADLY in the 1980s); the CV4004s I bought and sh**canned had date codes of 1984 and 1985, at the Mitcham plant, though, not Blackburn. I think Mullard was DONE by 1986; I ordered what I thought were going to be XF4 EL34s by Mulllard Blackburn in late 1986 and they turned out to be East German RFTs with Mullard "foxface" logos! Hope this helps; others are more into such details-- they could give you the time of day when the last worker left! :00)
ARC- Yes, "Mullard" was about to be retired as a Philips brand name by 1986, let alone Mullard tube production.Did you really see "B" codes with manufacturing codes as late as '84? Not Mitcham or Mullard brand, but Blackburn specifically? That's the latest I've heard of. Latest Xf4 I've seen is latish 1981 (manufacturing code, not printing date codes).
Thanks in advance for info-
Thanks for the response. Please see next question regarding date code confusion. Thanks.
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