New old stock Amperex 12AU7A / ECC82 vacuum tube, made by Mullard Blackburn with B3H4 factory/date code. Comes in the original Amperex box.

Tested strong and closely balanced:

Test Results:

MU / Gain: 16.5 / 16.1

mA/V: 1.49 / 1.47

Noise: 85.7 / 85.6 dB

Microphonics are excellent — almost zero microphonics. Tap is barely audible when the tube is tapped, with no ringing, lingering, or excessive feedback

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Listed2 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
  • 12au7a
Categories
Year
  • 1963

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Hillbilly Tubeworx

Houston, TX, United States
Joined Reverb:2023

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