GE 12AT7 ECC81 Tubes, Matched Pair, Tested, NOS/NIB, 1961 and 1962 Date Codes

1966 GE 12AT7 ECC81 Tubes, Matched Pair, Tested, NOS/NIB

These tubes have gray plates, halo getters and date codes from 1966.

These were tested on my calibrated TV-7/B. They have been tested for shorts, gas, and transconductance. All of the tubes test very strong with readings of 78/85 and 86/81. Minimum is 50.

They have been sonically tested in my DIY pre-amp and are quiet with no noise or microphonics.

Tubes are described, tested, and presented to the best of my ability, subject to the limitations of the equipment that I have available (Hickok 539C and several TV-7’s). Test results are likely to vary some between your equipment and mine due to the imprecise nature of 60-year-old consumer-grade test equipment.

About me. I have over 62 years of experience in many facets of electronics design and repair. I have been working with tubes since I was 12 years old. I am an active ham radio operator and have been for 62 years. I’m a retired electrical engineer with 30 years in the Semiconductor industry. I’ve been collecting, buying, and selling tubes and other tube based equipment since the 1980s. The pictures you see are of the actual tube(s) you’ll receive. 

I will ship international.

Don't see the tubes you are looking for? Contact me and I may be able to help you.