Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB RCA 6H6 6H6GT NOS They are still stapled in

They are still stapled in their boxes

new in box (For Tube One) matched pair of Unitron 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box Westinghouse 6X4 tested to spec on our Paul Hart-calibrated TV7/U

new in box milspec RCA 12SG7 JAN-CRC-12SG7 tube tested to spec on our Paul Hart-calibrated TV7/U

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

Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB RCA 6H6 6H6GT NOS They are still stapled inThis perfectly matched pair of new old stock, new in box 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 69 where minimum (65%) is 55. 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 67 05 67