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Old 20th Nov 2017, 12:22 am   #5
Nuvistor
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Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 7,606
Default Re: "Foreign" marked B9A valves

At least in the 60’s and early 70’s the valves whatever the place of manufacture were on the whole decent products, middle 70’s onwards was another matter.
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