Matched Pair Sylvania Black Plate 12BY7 12BY7A Vacuum Tubes Valves T16 new in box International Servicemaster

new in box International Servicemaster 6CG8A tube tested to spec on our Paul Hart-calibrated TV7/U

new in box US-made 6KZ8 tubes tested to spec on our Paul Hart-calibrated TV7/U

I am playing them in my Musical Paradise MP-301 MK3 as I write and they sound excellent

This matched pair of RCA-MANUFACTURED 6K6GT tubes was tested on our Maxi-Matcher 400 volts on the plates and a bias of -36 volts for shorts

IF YOUR COUNTRY IS SIMILAR

Matched Pair Sylvania Black Plate 12BY7 12BY7A Vacuum Tubes Valves T16 new in box International ServicemasterThis matched pair of Sylvania black plate 12BY7 12BY7A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 54 while Tube Two also measured 54. (Minimum (65%) is 46 and 100% is 71. These tubes have black plates; chamfered O getters and rectangular radiators for cooler operation and longer tube life. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY