Amperex Bugle Boy ECC189 7308 6DJ8 7DJ8 Vacuum Tube Valve For Your Schiit JAN-CHS-5933 Milspec new in box matched pair

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

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

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

It is massively reinforced against vibration with three mica spacers as well as top wire snubbers

This new old stock-TESTING matched pair of Sylvania 6F6GT tubes was tested on our Maxi-Matcher -- with 325 volts on the plates and a bias of -36 volts -- for shorts

Amperex Bugle Boy ECC189 7308 6DJ8 7DJ8 Vacuum Tube Valve For Your Schiit JAN-CHS-5933 Milspec new in box matched pairThis 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