Raytheon 6L7 Vacuum Tube NOS-Testing 19BG6G Octal T39 Tube One: 31

Tube One: 31

These four US-made 6AB4 tubes tested to spec on our Paul Hart-calibrated TV7/U

They have great bass and sparkling highs and Mann's voice is warm and clear as a bell

These tubes have acid-etched codes and designations as well as silk-screened 67-05 67-22 188-5 and 68-26 188-5 67-50 production run/provenance codes

This new old stock-testing matched pair of RCA 12B4 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Raytheon 6L7 Vacuum Tube NOS-Testing 19BG6G Octal T39 Tube One: 31This new old stock testing Raytheon 6L7 tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 32 27 where minimum (65%) is 18 18 and 100% is 28 28. 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.