This is a well matched pair of Sylvania 12AT7 tubes. They were made in the USA by Sylvania. Each one of these tubes tests very closely to the other. These tubes are visually almost identical. They were manufactured to rigorous industrial specifications so you can expect low noise and microphonics. These tubes have flat black AX-style plates, yellow or faded lettering, and a halo top getter. These are highly sought after Sylvania 12AT7 tubes, act quickly before they sell out!! More available upon request.

Be careful buying tubes from other sellers who list "matched pairs" but do not provide test results or specify the equipment that they use to test their tubes.

I personally tested this tube on my recently calibrated Hickok 600a and TV7D/U tube testers.

The results are as follows:

5,100/5,000
5,100/5,000

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Listed3 months ago
ConditionExcellent (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
Brand
Model
  • 12AT7
Categories
Year
  • 1950s - 1960s
Made In
  • United States

Product safety information may be available here.

TX Audio Tubes

HOUSTON, TX, United States
Joined Reverb:2021

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