Matched Pair Sylvania 50L6 Vacuum Tubes NOS NIB Oliver Cromwell And new in box Sylvania 6GX6

new in box Sylvania 6GX6 / 6GY6 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Matsushita-MANUFACTURED

Flashing Quality: good

Transconductance measured 77 for both tubes where minimum (65%) is 40

Matched Pair Sylvania 50L6 Vacuum Tubes NOS NIB Oliver Cromwell And new in box Sylvania 6GX6This new old stock (from a bulk box) loosely matched pair of Sylvania 50L6 output tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 78 and Tube Two measured 84 where minimum (65%) is They both have copious quantities of flashing; O getters; gray plates; round mica spacers and anode radiators for cooler operation and longer life. They have DR and BR date codes,