A tube was considered acceptable/new/ passed standards if it tested between the specified minimum and maximum on a tube data sheet or the minimum value specified on the tester (tv7 is minimum is 65%).
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These beauties are ready to use for your next level audio project(s).
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NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states "Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.
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We would very much appreciate if you could leave us one, too!
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This ECC83 pre-amp tube was made in Blackburn in October 1963. It has 15mm ribbed plates, a halo getter, copper support rods and straight pins. Production codes: I61, B3J4.
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MULLARD 12AX7 / ECC83 original valve. A genuine Mullard 12AX7. The best of the best. Arrived early. A great product - eyefactor. As described and great comms.
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I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
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