Sylvania Gold Brand GB-6X4WA 6X4 Vacuum Tube Rectifier Milspec Black Plates NOS NIB

Sylvania Gold Brand GB-6X4WA 6X4 Vacuum Tube Rectifier Milspec Black Plates NOS NIBThis new old stock, new in box, black plate, milspec Sylvania GB 6X4WA was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas and it measured where minimum (65%) is 40 40 and 100% is 62 62. 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

They have shoulder / ST / Coke bottles and dimpled-sheet getters

This matched trio of GE 12HG7 tubes was tested on our Paul Hart-calibrated TV7/U (on the 12BY7 setting) for shorts

new in box US-made 7B4 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 22JR6 tubes tested to spec on our on our Jackson 648

new in box GE 12AF6 tube tested to spec on our Paul Hart-calibrated TV7/U

This paperback book is in very good shape

This new old stock-testing pair of US-made 6BG6GA output tubes was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

new in box GE 6GF7A tubes tested to spec on our Paul Hart-calibrated TV7/U

They measured 85/66 for Tube One and 85/70 for Tube Two where minimum (65%) is 57/57 and 100% is 88/88

new in box RCA 25DN6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This is one of the best-sounding standard pressings I have heard in a while

These shields are 46 MM high with the top 33 MM encased in lead approximately 2