Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing Dutch Amperex This Philco 5Y4G rectifier tube

This Philco 5Y4G rectifier tube tested 58/52 where minimum (65%) is 40/40 and 100% is 62/62

new in box Westinghouse WL5642 tubes

The 1X2 has been revised to "1X2A"

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

a Micanol base

Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing Dutch Amperex This Philco 5Y4G rectifier tubeThis 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