Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods US-Made Nonal copper support rods and good

copper support rods and good flashing

outstanding flashing

This Amperex Bugle Boy ECC189 / 7308 / 6DJ8 / 7DJ8 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

These tubes have great bass and sparkling highs and Pete Ham's voice is warm and clear as a bell

Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods US-Made Nonal copper support rods and goodThis matched pair of GE 6SN7GTB dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 70 68 for Tube One and 71 67 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have tall bases; white silkscreening; side horseshoe getters; copper support rods and great flashing. Their date provenance codes are 56 30 188 5 and 56 17 188 4, respectively.