Matched Pair General Electric GE 12AU7 12AU7A ECC82 Vacuum Tubes Copper Support Rods L1 new in box Sylvania 38HE7

new in box Sylvania 38HE7 tube tested to spec on our Paul Hart-calibrated Hickok TV7/U

5 -- maybe an eight -- out of ten

mesh plate tubes both tested 32 on our Paul Hart-calibrated TV7/U where minimum (65%) is 25 and 100% is 38

This lot of seven new old stock

Matched Pair General Electric GE 12AU7 12AU7A ECC82 Vacuum Tubes Copper Support Rods L1 new in box Sylvania 38HE7This matched pair of General Electric 12AU7 ECC82 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 70 74 while Tube Two measured 71 69 where minimum (65%) is 56 56 and 100% is 87 87. These tubes have narrow 19 MM plates, each with three rectangular holes; O getters; copper support rods and good flashing. I have played them in my Radio Craftsmen RC 2