Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing Dutch Amperex new in box GE 3AT2

new in box GE 3AT2 / 3AT2B 3/ AW2 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Westinghouse WL5642 tubes

THE BASE HAS BEEN MARKED FOR SAFE AND EASY INSERTION

The 1X2 has been revised to "1X2A"

It sounds very good with an occasional pop and tick audible in the pianissimo passages

Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing Dutch Amperex new in box GE 3AT2This new old stock TESTING matched pair of GE 6SN7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 82 74 for Tube One and 84 74 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have short bases; white silkscreening; side horseshoe getters; copper support rods and great flashing. Their date provenance codes are 3 22 188 5 and 4 39