Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing 6BH11 NOS NIB These five US-made 12A8GT tubes

These five US-made 12A8GT tubes were tested for shorts

68 and 68 where minimum (65%) is 45

Tube Five (triode): 46

This new old stock-testing Sylvania 6L6GC was tested on our Maxi Matcher 2 for shorts

new in box Japanese-made 26LX6 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing 6BH11 NOS NIB These five US-made 12A8GT tubesThis new old stock testing matched pair of General Electric GE 12SN7 12SN7GTA 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 82 82 and Tube Two measured 85 84 where minimum (65%) is 50 50. Both tubes have gray, ladder plates; side horseshoe getters; crenelated, gapped, top mica spacers with smooth sided rectangular bottom mica spacers; copper support rods