1950's GE 12AX7 ECC83 Long Plate Tube, NOS Testing

1950's GE 12AX7 ECC83 Long Plate Tube, NOS Testing

This tube has long (17 mm) ladder plates and a D getter. It was made in the 1950's.

This was tested on my calibrated Hickok 539C. It has been tested for shorts, gas, and transconductance. The tube tests very strong with a reading of 1600/1500. Minimum is 875.

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

I will ship international.

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. 

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