Matched Pair National Union NU 6V6 6V6GT Black Glass Vacuum Tubes NOS-Testing

Matched Pair National Union NU 6V6 6V6GT Black Glass Vacuum Tubes NOS-TestingThis new old stock testing matched pair of National Union 6V6GT blackout glass output tubes was tested on our Maxi Matcher 2 with 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 2670 micromhos for Tube One and 2430 for Tube Two. Plate current measured 27. 8 and 27. 9 milliamps, respectively. (New US made 6V6s typically test with plate current from the mid teens

32 and 36 where minimum (65%) is 25

This matched pair of new old stock

This tube has 21 MM black plates

I am listening as I write and this album sounds fair-to-good with constant

ITEMS ARE GUARANTEED GOOD ON SHIPMENT

This Ken-Rad 6A7 tube was tested on our Paul Hart-calibrated TV7/U for shorts

This is a historical record

These US-made 12SF7 tubes were tested on our Paul Hart-calibrated TV7 for shorts

It measured 60/45 where minimum (65%) is 40/40 and 100% is 62/62

outstanding flashing

INTRUSIVE AND DRACONONIAN GERMAN PACKAGING REGULATIONS -- AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM -- WE WILL NO LONGER SHIP TO GERMAN ADDRESSES FROM JUNE 1

Transconductance: 1410 / 1411 (New is approximately 1450)