6189 / CV4003 Sylvania Philips USA NOS
6189 / 6189W (aka 12AU7WA/E82CC) SYLVANIA/Philips USA NOS double triode
The 6189W is a premium grade 12AU7 that is ruggedized for reliable operation in military/industrial mobile, shipboard, and aviation communications equipment.
This tube is characterized by low microphonics, excellent linearity, and long life. It is a top choice for any audio application requiring high quality 12AU7 (aka 12AU7WA, E82CC, 5814, replaces or upgrades any ECC82, 12AU7)