GE 6AU6 6136 Five Star Vacuum Tube Milspec Industrial NOS NIB June 10 2024 These seven Sylvania-made 3CB6 tubes

These seven Sylvania-made 3CB6 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box matched pair of RCA 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts

black plates and bottom

There were no shorts or gas and they measured 52/52

These tubes have black plates

GE 6AU6 6136 Five Star Vacuum Tube Milspec Industrial NOS NIB June 10 2024 These seven Sylvania-made 3CB6 tubesThis new old stock, new in box GE 6AU6 6136 tested to spec on our Paul Hart calibrated TV7 U. 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. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN