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I don't know what you are not understanding...

or if you've just misread the original post and the context it gives my comments.

The original post asked about Brimar 12AU7, and you seem to want to talk only about Brimar CV4003's, even though I am replying in the context of overall Brimar production. I really don't know what the problem is, I don't see any Brimar CV4003 listed on your site.
And, sadly, people might then take your narrow comments and apply them more broadly, which would be wrong.

Yes, Kevin, I have seen and have many Brimar tubes made not in the UK and not labelled 'foreign made', among them, some Russian 6V6GT, some US 6L6G, some East European 12AU7. If you want some to verify yourself, try Bugleman, he has lots.

To be clear once again, I said the following:

Brimar made good tubes. Early ones are generally better, particularly in the case of 12AU7 variants.

There are different constructions of Brimar CV4003 labelled tubes, and vintages. So it is incorrect to say they are uniformly consistent. I have here a very nice smooth plate Brimar CV4003. I have early ones and later ones. All sound different.

Early on Brimar didn't source any tubes they made from foreign sources, as production started to wind down, and Brimar consolidated their production, lines closed and outsourcing increased. Brimar still exists today, by the way, it's quite easy to get information.

I said clearly that Brimar were better than most at marking tubes as 'foreign made', but to say they always did is flat out false. Sometimes it was only marked on the boxes, not the tubes - I have 6X4's here like that.

I hope this clear it up for you.


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