Sylvania 17KV6 17KV6A Vacuum Tube NOS NIB I Shall Open This lot of three US-made

This lot of three US-made 5763 tubes tested as follows on our Paul Hart-calibrated TV7/U:

This pressing has lightly-moderate surface noise audible in quiet passages and barely-audible in voice-level passages

This pressing has very light surface noise

They measured 96/80 for Tube One and 98/80 for Tube Two

Sylvania 17KV6 17KV6A Vacuum Tube NOS NIB I Shall Open This lot of three US-madeThis Sylvania 17KV6A 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 VALUE. IF AN ITEM