1956 Tung-Sol 6SN7GTB ECC33 Tall Bottle Tubes, Matched Pair, NOS Testing

1956 Tung-Sol 6SN7GTB ECC33 Tall Bottle Tubes, Matched Pair, NOS Testing

These tubes have triangular black plates and D getters at the top. They were made in 1956.

These were tested on my Dan Nelson calibrated TV-7B. They have been tested for shorts, gas, and transconductance. The tubes test with readings of 100/95 and 92/92. Minimum is 50.

They have been sonically tested in my homebuilt pre-amp and are dead quiet with no 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, and have been a Reverb seller since 2020. The pictures you see are of the actual tube(s) you’ll receive. 

I will combine shipping. Just ask.

I will ship international.

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