Sylvania Number Type 30 #30 Vacuum Tube Engraved Base ST Shoulder Shape NOS-Testing 6W4 Black Plate These tubes have mica snubbers

These tubes have mica snubbers for increased stability and lowered microphonics

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

Tube One measured 1380 micromhos and drew 10

54 and 54 where minimum (65%) is 38

Sylvania Number Type 30 #30 Vacuum Tube Engraved Base ST Shoulder Shape NOS-Testing 6W4 Black Plate These tubes have mica snubbersThis new old stock testing engraved base Sylvania number type #30 tube tested 31 on our Paul Hart calibrated TV7 U where minimum is 23 and 100% is 35. 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