Cunningham 6A4 Vacuum Tube Valve Five Eighths Wave vertical support rods and triple

vertical support rods and triple mica spacers for lowered microphonics and

Tube One measured 28 while Tube Two measured 29 where minimum (65%) is 22

It is 36 inches by 30 and the cost of shipping is covered in the lower 48 states

These four National Union type / number 41 tubes tested as follows on our Paul Hart-calibrated TV7/U:

Cunningham 6A4 Vacuum Tube Valve Five Eighths Wave vertical support rods and tripleThis 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