Sylvania 35W4 Vacuum Tube Valve Wassermusik Philips 56 and 57 where minimum

56 and 57 where minimum (65%) is 40

This perfectly-matched pair of Philco 24 globe

24 and 24 where minimum (65%) is 25 and 100% is 38

Tube One measured 56 while Tube Two measured 57 where minimum (65%) is 38 and 100% is 58

This trio of RCA gray glass 12BY7 / 12BY7A tubes was tested on our Paul Hart-calibrated TV7 for shorts

Sylvania 35W4 Vacuum Tube Valve Wassermusik Philips 56 and 57 where minimumThis is a Dutch auction for Sylvania 35W4s. Silkscreening quality and color thereof will vary. They have been tested on our Paul Hart calibrated TV7 U (where minimum (65%) is 45) and have the following values in descending order: They measured 57, 55 and 51 where minimum (65%) is 40. Etsy will indicate how many are available. The default setting is one. You must indicate the quantity you want. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT