Sylvania 12AU7 ECC83 Early Production Black Plate Copper Support Rods Vacuum Tube For Your Bottlehead Berman Plays Liszt 5 record cleaner and then

5 record cleaner and then played it on my He-Man Rig which consists of a Rega Planar Three with an Ortofon X5-MC cartridge on an RB-300 tone arm with a Cern Audio Dual 6SN7 / 6SL7 phono preamp / preamp feeding my Bottlehead headphone amplifer driving Sennheiser HD 580 cans

It measured 80 where minimum (65%) is 50 and 100% is 77

winged plates with one rectangular hole per plate

This Ken-Rad 5V4G rectifier tube was tested on our Paul Hart-calibrated TV7/U

Sylvania 12AU7 ECC83 Early Production Black Plate Copper Support Rods Vacuum Tube For Your Bottlehead Berman Plays Liszt 5 record cleaner and thenThis Sylvania 12AU7 ECC82 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured a nicely balanced 68 72 where minimum (65%) is 56 56 and 100% is 86 86. This tube has black, slightly shiny ladder plates; excellent flashing; a top, slanted D getter; copper support rods. This is an early production 12AU7. It is not a 12AU7A WE HAVE SCORES OF THOUSANDS OF