Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB Zenith Drawer This matched pair of French

This matched pair of French Amperex 6BL8 pentode/triode tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box Zenith 6DQ4 tube tested to spec on our Paul Hart-calibrated TV7/U

It has very-light surface noise

This matched pair of RCA 12SN7GT dual triodes was tested on our Paul Hart-calibrated TV7 for shorts

Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB Zenith Drawer This matched pair of FrenchThis perfectly matched pair of milspec GE 6C4 6C4WA triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Both tubes measured 72 where minimum (65%) is 55 and 100% 85. They have gray plates; top O getters and two additional support rods for increased ruggedness and microphony suppression. These tubes have acid etched codes and designations as well as silk screened 68 26 188 5 67 50