This is a well balanced Sylvania 12AU7A tube that was made in the USA by Sylvania, in the Lansdale factory that made the legendary Philco 12AU7s. Philco sold the factory to Sylvania in the mid 50s, and continued to manufacture certain tubes, including this tube. The tube was manufactured to rigorous industrial standards, so you can expect low noise and microphonics. Each of the plates tests closely to the other. This tube has short black plates, yellow lettering, and a halo top getter. These are highly sought after Sylvania 12AU7A 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 hand tested these tubes on my recently calibrated Hickok 600a and TV7D/U tube testers.

The test results are as follows:

2,650/2,700

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Listeda year 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
  • 12AU7A
Categories
Year
  • 1950s
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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