Original Soviet pentode tubes 6J32P (6Ж32П), manufactured at the Svetlana Factory (Leningrad, USSR).
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Tested on an AVO valve tester, with results shown below. These are badged ‘Marconi’, but have the acid etched date codes of Mullard's Blackburn factory which clearly identifies it as a Mullard tube.
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A used tube in working order and good condition. GM (mA/V) - 2.2. ia (mA) - 3.6. Data Book Specification.
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6267 EF86 CV2901 Valve Tube. Mazda Foreign, Made in USSR. NOS, Supplied in Original Box.
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CV4085 EF86 Valve Tube. GEC KB/Z, British Made. NOS, Supplied in GEC Box.
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The date code is 8Y1 +/-193. Although the tube is marked ‘Made In Holland’, the Mullard factory code ( +/-) indicates it was made at the Radiotechnique factory in Chartres, France. A used tube in working order and good condition (the glass may be slightly dirty around the transfer because I didn’t want to risk rubbing it off).
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1950s Holland production - Open and airy sound - expansive midrange and extended top end - superior vocals. Product Summary. Test result on your tester will NOT be accepted as evidence of defective product.
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