Matched Pair OTK 6V6 6V6GT Black Glass Vacuum Tubes NOS-Testing I Robot They are dead quiet when

They are dead quiet when the CD player is paused and have excellent frequency response

Sperry-BRANDED (SPL) 6V6GT output tubes was tested on our Maxi-Matcher 2 in Real World conditions with 400 volts on the plates and a bias of -36 volts for shorts

This quad of US-made 6211 dual triodes was tested on our Hickok 800 for shorts

These end links appear to be made of stainless steel and rose gold or copper

Matched Pair OTK 6V6 6V6GT Black Glass Vacuum Tubes NOS-Testing I Robot They are dead quiet whenThis matched pair of OTK MANUFACTURED black glass 6V6GT output tubes was tested on our Maxi Matcher 2 for shorts, gas and transconductance. There were no shorts or gas. Plate current measured 20. 2 milliamps and transconductance was 2460 micromhos for Tube One (Raytheon BRANDED). Tube Two (Ameco BRANDED) measured 21. 9 2460. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or