This is a well balanced single GE 6SN7GTB vacuum tube. It was manufactured in the USA by GE. Both plates test very close to each other. This tube has the GE factory code 188 and logo printed on the tube. It was manufactured to rigorous industrial standards so you can expect low noise and microphonics. It has a short, clear glass envelope and a thicc black base. It also has parallel gray plates, white lettering, and a single side getter. These are highly sought after GE 6SN7GTB tubes, act quickly before they sell out!! More available upon request.
Be careful buying tubes from sellers who list tubes as matched if they do not provide test results or the equipment that they tested their tubes on.
I personally tested these tubes on my recently calibrated Hickok 600a and my TV7D/U and the results are as follows:
2,575/2,500
| Listed | 10 months ago |
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| Condition | Excellent (Used) Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more |
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Product safety information may be available here.

