Mullard 6EM5 Vacuum Tube NOS NIB Black Bottles but not in guitar amps

but not in guitar amps and other environments with loud noise and/or excessive vibration

This pressing has light surface noise

They measured 86/82

This trio of Westinghouse black plate 12AU7A / ECC82 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

almost-perfectly-matched pair of RCA (Hewlett-Packard By RCA) 6AG7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Mullard 6EM5 Vacuum Tube NOS NIB Black Bottles but not in guitar ampsThis new old stock, new in box GE branded 6EM5 tube tested to spec on our Paul Hart calibrated TV7 U. I believe it is a Mullard as it has sutured tops and is labelled ""GT BRITAIN." It lacks any kind of date or provenance code. 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.