Sylvania 6X4 Vacuum Tube Rectifier Black Plates NOS NIB Black Plate NOS NIB Tube One (Philco-LABELED

Tube One (Philco-LABELED

Transconductance measured 44 and 48 where minimum (65%) is 35

Tube one measured 45 in its triode section where minimum (65%) is 29 and 100% is 45

It is MM wide from the extreme left to the tip of the winding stem on the right

These tubes test poorly but should work in many applications

Sylvania 6X4 Vacuum Tube Rectifier Black Plates NOS NIB Black Plate NOS NIB Tube One (Philco-LABELEDThis new old stock, new in box black plate Sylvania 6X4 was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas and it measured 55 55 where minimum (65%) is 40 40 and 100% is 62 62. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS.