General Electric GE 6L6 6L6GC Vacuum Tube For Your Univalve NOS-Testing 6AK6 Septal T35 Tube Two probably has a

Tube Two probably has a piece of broken glass in it

Transconductance measured 4100/3400 micromhos

where minimum (65%) is 40/40

This matched pair of Tung-Sol black glass 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts

Enhanced Cooling: yes

General Electric GE 6L6 6L6GC Vacuum Tube For Your Univalve NOS-Testing 6AK6 Septal T35 Tube Two probably has aThis new old stock testing and looking! GE 6L6GC output tube was tested on our Maxi Matcher with 400 volts on the plates and a bias of 48 volts for shorts, gas and transconductance. There were no shorts or gas and it tested as follows: Transconductance: 2710 micromhos Plate Current Draw: 71. 6 milliamps (New US 6L6GCs typically test with plate current from the low 20s to mid 30s with transconductance from 2200 micromhos or so.) It has double, side D