W/ 2 Adapters to 12AX7 Included (5755 --> 12AX7). Pair Raytheon CK5755. TESTED as 5755 on SENCORE TC-136. AUDIO VACUUM TUBES. NOS w/ 2 Original Boxes Included. AMPLIFIER TYPE TUBES.
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(x2) Pair Raytheon 12AU7 / ECC82 BLACK plate tubes Test Strong! - New Old Stock. Condition is "New". Shipped with USPS First Class.
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Tubes that test within certain specifications may be considered good or usable, but whether they are specifically labeled NOS DEPENDS on the history. This is a very marginal test, only for. special checking.
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TESTED ON A MAXI PREAMP II TUBE TESTER FOR GAIN(Mu), TRANSCONDUCTANCE(Gm) AND NOISE(dB). While performing an audio tap test on the Maxi Preamp through a guitar amp Triode A tested good when tapped, Triode B tested good when tapped.
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1 Pair of GE 6201 JG-12AT7 Vacuum Tubes Short Gray Plates Support Rods Thick O Getters. Tube tests at 42/44 with 32 being the minimum score for a good tube (with 65% life remaining).
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Silver Grade tubes are matched within 15%, Gold Grade tubes within 10% and Platinum Plus Grade 1%. You are purchasing a "Platinum " grade matched pair of tubes. Test scores will average between 90% and 95% of NOS values.
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High-mu double triode. Designed for aircraft servo-amplifiers. 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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