Amperex Bugle Boy ECC189 7308 6DJ8 7DJ8 Vacuum Tube Valve For Your Schiit JAN-CHS-5933 Milspec What makes this funny is

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

Tube Two has a narrow crack in its base which

It was stored in a cool

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

new in box matched pair of GE 6SJ7s was tested on our Paul Hart-calibrated TV7 for shorts

Amperex Bugle Boy ECC189 7308 6DJ8 7DJ8 Vacuum Tube Valve For Your Schiit JAN-CHS-5933 Milspec What makes this funny isThis 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