Sylvania 6FV6 Vacuum Tube NOS NIB Geprueft T17 These tubes have acid-etched codes

These tubes have acid-etched codes and designations as well as silk-screened 67-05 67-22 188-5 and 68-26 188-5 67-50 production run/provenance codes

new in box 8JV8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Plate current measured 34 milliamps with a transconductance of 4310 micromhos

excellent silkscreening and 312 132 provenance/date codes

These thirteen US-made 5T8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Sylvania 6FV6 Vacuum Tube NOS NIB Geprueft T17 These tubes have acid-etched codesThis new old stock, new in box Sylvania 6FV6 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