Posts on topic: 12AX7

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Museum pieces: Brimar Trustworthy ECC803S

Brimar 'Trustworthy' ECC803S



Extremely rare, Brimar 'Trustworthy' ECC803S -with carbon laminated box anode.  The trustworthy ECC803S were assembled in 1969 at Rochester Aiport in Kent for long life telephone applications.  The code on this particular tube is 3G6/977.

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