Matched Pair Sylvania 6K6 6K6GT Black And Silver Bottles Vacuum Tubes NOS-Testing

Matched Pair Sylvania 6K6 6K6GT Black And Silver Bottles Vacuum Tubes NOS-TestingThis matched pair of Sylvania MANUFACTURED 6K6GT tubes was tested on our Maxi Matcher 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One drew 18. 8 milliamps' plate current and measured 2680 micromhos. Tube Two measured 19. 1 2820. New nominal is within one standard deviation of 1900. These tubes have pretty gray and silver bottles; copper support rods and round mica spacers. As I

sound quality is a 6

Tube One's etching is "5654" while Tube Two's is "6AK5

It is a faithful transfer of the 78 sources and

where minimum (65%) is 29 and 100% is 45

These rectifiers test below the cusp

This tube has an acid-etched bottle

This perfectly-balanced GE Number 80 rectifier tube was tested on our Paul Hart-calibrated tube tester for shorts

It measured 36 in its triode section where minimum (65%) is 19

Tube One measured 1610 micromhos and drew 18

These tubes have mica snubbers for increased stability and lowered microphonics

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

great bass and sparkling highs and the alto sax cuts through the air without a hint of stridency