Amperex Bugle Boy ECC189 7308 6DJ8 7DJ8 Vacuum Tube Valve For Your Schiit JAN-CHS-5933 Milspec The reference to "Uncle Doug"

The reference to "Uncle Doug" is a hat tip to The Most Sublime Guitar Amplifier Guru who recommended a significant -- but not-too-large -- difference in plate current draw for just that right amount of push-pull distortion

Tube Two has a narrow crack in its base which

34/34 and 38/41 where minimum (65%) is 25/25 and 100% is 38/38

What makes this funny is that a major US defense contractor likely committed a number of felonies by smuggling communist Soviet tubes into the US at the height of the Cold War

These matched quad of RCA milspec JRC-6H6 / 6H6 / VT-90 6H6 tubes was tested on our Paul Hart-calibrated TV7/U

Amperex Bugle Boy ECC189 7308 6DJ8 7DJ8 Vacuum Tube Valve For Your Schiit JAN-CHS-5933 Milspec The reference to "Uncle Doug"This Amperex Bugle Boy ECC189 7308 6DJ8 7DJ8 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 41 41 where minimum (65%) is 50 50 and 100% is 77 77. This tube has steel support rods; a D getter and matte gray plates. As I write, I am playing Pink Floyd's Green Is The Colour" in my Schiit Audio Vali 2 headphone amplifier and it sounds ethereal, romantic and poignant