Tested/Matched Pair (2 Tubes) 7-Pin JAN 5654W Fully-Tested Vacuum Tubes - Upgrade for 6AK5 / 6J1 / 6J1P / EF95 - JAN 5654W Platinum Grade Pair

Tested and matched pair (2 tubes) of low-noise 7-Pin NIB/NOS JAN 5654W Vacuum Tubes. Considered one of the best of the 5654 / 6AK5 / EF95 family of tubes for audio use. All tubes must also pass a specialized life test and an audio sound test. Platinum Grade tubes are supplied with data labels showing measured ip and Gm. Amplifier damage can occur if you substitute the wrong type of tube. 5654W tubes should only be used to directly replace 7-Pin 6J1, 6J1P / 6J1P-EB / 6Zh1P-EV, 6AK5, 6AK5W and EF95 tubes.

DO NOT substitute for other types of 7-pin vacuum tube unless approved as a substitute by the manufacturer of your audio device. AN 5654W tubes, and many other vintage US-manufactured vacuum tubes, used water-based silk-screen printing for final tube-markings. As the print is water-based, the original green-color print may be faded or partially missing due to the age of the tubes (the manufacture of 5654W tubes ended approx. 35 years ago). However, determining the authenticity of a 5654W tube is straightforward, as both "5654" and "USA" were etched into the glass during the original manufacturing process (this white-gray lettering can be seen in one of the listing images).

The green print was used by the original factory to denote details such as "JAN 5654W", "Made in USA", factory logo and date and factory codes