This is the Famous Mullard 12AT7WA. We mostly have the CV4024 version. The CV stands for "Civilian Valve" which is a military designator for the British military. Any tubes that were designated for the military, by law, could not have the factory logo on them. Often, CV tubes would be re-labeled after decommissioning so it is possible to see a factory logo on a CV tube. These are the real deal Mullard made tubes. Some of the last ones left, these are great sounding tubes with that old European heritage.

The NOS Mullard ECC81 / ECC801 / 12AT7WA / CV4024 is a new never used tube, with low noise and long lasting, in original white military box. Exact equivalent to the European ECC81 code tube and can be used in any 12AT7 or ECC81 circuit/application.

Single tested tube or carefully selected and matched pair, very low loise and micro. Tubes comes with our certification containing the actually measured information.

Limited stock.

A New Old Stock (N.O.S.) tube is an unused tube no longer in production. A N.O.S. tube is good today as it was originally, because the glass sealing techniques perfected long ago have been in use for years and years. A N.O.S. tube can potentially last a lot longer than modern tubes. When we have available a N.O.S. tube stock that comes from the same production run we carefully select them for gain, for section-to-section uniformity and for sensitivity to microphonics. Furthermore, a selected pair of tubes will only include low noise ones.

Information on tube matching