Super Silvertone 35Z4 35Z4GT Vacuum Tube NOS NIB 6SJ7 Black They have engraved / hot-stamped

They have engraved / hot-stamped bases on is Champion-branded and the other is Zenith

This paperback book is in good condition

hanging filaments and outstanding flashing

Tube One Transconductance: 45/45

not included) with Pink Floyd's "Obscured By Clouds" and it sounds terrific

Super Silvertone 35Z4 35Z4GT Vacuum Tube NOS NIB 6SJ7 Black They have engraved / hot-stampedThis new old stock, new in box Super Silvertone 35Z4GT 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