RCA 12AU7 12AU7A ECC82 Vacuum Tube NOS-Testing Black Plate Slant D Getter For Your Univalve Or Bottlehead VR150 T31 It has very light surface

It has very light surface noise

The pressing is quite quiet and I would give it an 8-8

This Majestic number / type 55 tube was tested on our Paul Hart-calibrated TV7/U for shorts gas and transconductance

This matched pair of GE 6X5GT rectifier tubes was tested on our Paul Hart-calibrated TV7/U for shorts

They are dead quiet when the preamp is muted and have excellent frequency response

RCA 12AU7 12AU7A ECC82 Vacuum Tube NOS-Testing Black Plate Slant D Getter For Your Univalve Or Bottlehead VR150 T31 It has very light surfaceThis new old stock testing RCA black plate 12AU7A dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. This tube has 17MM black plates; a slant D getter; steel support rods and nice flashing. It measured 70 82 where minimum (65%) is 56 56. I have played it in my Bottlehead Crack headphone amplifier and it sounds terrific. It is dead quiet when the volume is muted and has excellent