Hi up for consideration is one National (GE USA) grey plate tube ,new, unused. These are a great tube, great consistency. what you are buying is one tube, tested.
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ECC81 12AT7 GE by Mullard. If you buy more than 1 item from.
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THESE TUBES HAVE NOT BEEN TESTED. HOWEVER, WE HAVE DONE SPOT CHECKS ON DIFFERENT TYPES OF TUBES FROM THIS WAREHOUSE. EVERY TUBE TESTED WAS GOOD. Both tubes show similar appearance and wear.
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Early pair of GE 12AT7/ECC81 tubes, with original boxes. Square getters, close 1953 date codes. Checked quiet and non-microphonic on the Amplitrex AT1000. Actual manufacturer GE. Small signal (i.e. 12AX7) tubes are generally checked for noise and microphonics; power tubes (i.e. 6L6) are usually not.
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Test 2006/1940 & 2072/1993 where 1800+ is NOS in a Maxi-preamp 2. We cannot be responsible for what tubes test in another tester.
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This particular model is designed with 3 mica black plates and is specifically a 12AT7 tube, known for its strong performance in various audio and video applications.
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Tube Type: 12AT7 / ECC81. This is a high-quality 1950s-era GE 12AT7 featuring the distinctivesquare tilt getter that slants toward the top mica—a classic hallmark of GE's premium early production. It tests at a very strong and balanced98/98 on my Sencore TC-109.
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