Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes NOS NIB Columbia EMI The pressing is quite good

The pressing is quite good with a few pops and crackles and I would give it a 7-7

Transconductance measured 33 for Tube One and 33 for Tube Two where minimum (65%) is 26

(New US-made 7C5s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so

Menin" by Mercury Living Presence

ETSY DOES NOT HAVE A SYSTEM IN PLACE FOR THAT YET

Matched Pair General Electric GE 6SL7 6SL7GT Vacuum Tubes NOS NIB Columbia EMI The pressing is quite goodThis matched pair of new old stock, new in box (For Tube One) GE 6SL7GT 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 45 38 while Tube Two measured 42 41 where minimum (65%) is 32 32 49 49. They have steel plates; steel support rods; 59 43 188 5 and 5 48 188 5 date provenance codes; solid top mica spacers; side harp getters; tall bases; medium bottles and