Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-Testing Compactron T08o They are microphonic and are

They are microphonic and are fine in the preamp stage of my MP-301 and other gentle environments

This new old stock-testing Sylvania 12AV7 dual triode was tested on our Jackson for shorts

nice flashing and ribbed

anode radiators for cooler operation and longer tube life

This tube has anode radiators for cooler operation and longer tube life

Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-Testing Compactron T08o They are microphonic and areThis new old stock testing matched pair of Sylvania 6AU6 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 85 for Tube One and 86 for Tube Two where minimum (65%) is 58. These tubes have top, U getters; gray plates and excellent flashing. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier (with adapters, not included) with Aimee