Cunningham 6A4 Vacuum Tube Valve Five Eighths Wave 67 and 70 where minimum

67 and 70 where minimum (65%) is 50

new in box RCA 7B6 tubes tested to spec on our Paul Hart-calibrated TV7/U

These tubes have great bass and sparkling highs and Pete Ham's voice is warm and clear as a bell

Tube Two probably has a piece of broken glass in it

vertical support rods and triple mica spacers for lowered microphonics and

Cunningham 6A4 Vacuum Tube Valve Five Eighths Wave 67 and 70 where minimumThis Cunningham 6A4 tube was tested our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 73 where minimum (65%) is 50 and 100% is 77. It has a dimpled sheet getter, steel plates and a top, crenelated, round mica spacer. 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