General Electric GE 6SK7 6137 GL6137 Vacuum Tube NOS NIB Industrial 5-Star Version ST Shoulder Shape

General Electric GE 6SK7 6137 GL6137 Vacuum Tube NOS NIB Industrial 5-Star Version ST Shoulder ShapeThis GE 5 Star industrial 6SK7 GL 6137 tube 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

It has perforated plates

This trio of Westinghouse black plate 6CG7 / 6FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

These eleven US-made number / type 27 tubes tested below the cusp -- some far below

top to bottom) 25

These tubes have four shiny copper support rods

78 and 80 where minimum (65%) is 46 and 100% is 71

Admiral-BRANDED 5V4G rectifier tube was tested on our Paul Hart-calibrated TV7/U

These tubes have dark

This lot of six GE 6AC7s was tested on our Paul Hart-calibrated TV7/U for shorts

new in box Sylvania 12JT6A tube tested to spec on our Paul Hart-calibrated TV7/U

The tubes have rounded black plates

This RCA Radiotron number / type 80 rectifier tube was tested on our Paul Hart-calibrated TV7/U