RCA 6X4 Vacuum Tube Valve Rectifier Black Plates NOS NIB Mozart LP LM-1030 Sylvania-BRANDED 8BQ5 tube tested to

Sylvania-BRANDED 8BQ5 tube tested to spec on our Paul Hart-calibrated TV7/U

This tube has a bottom D getter and an E9M date code which means it was likely made by Sylvania

It is dead quiet when the preamp is muted and has excellent frequency response and sound-staging

TV7/U readings are in (parenthesis)

great flashing and black

RCA 6X4 Vacuum Tube Valve Rectifier Black Plates NOS NIB Mozart LP LM-1030 Sylvania-BRANDED 8BQ5 tube tested toThis new old stock, new in box black plate RCA 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. 1.