4 Sylvania 12HG7 12GN7 12GN7A Vacuum Tubes Valves NOS NIB Lot Of Four December 30 2025

4 Sylvania 12HG7 12GN7 12GN7A Vacuum Tubes Valves NOS NIB Lot Of Four December 30 2025These for new old stock, new in box Sylvania 12HG7 12GN7 12GN7A tubes 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

They have NU 188-5 and 3-09 188-5 date/provenance codes

I am playing them in my Musical Paradise MC-3 single-ended integrated amplifier as I write with Aimee Mann's seminal "Magnolia" album and it sounds terrific

This General Electric 22JF6 tube tested 75 on our Paul Hart-calibrated TV7/U where minimum is 54 and new is 100

new in box RCA-MANUFACTURED

These tubes have black and silver bottles

Both tubes have thin cracks in their bases

They have black plates

Most don't test great

new in box GE 6JF6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This lot of five US-made black plate

This hardcover book is in very good condition

gray plates and an anode radiator for cooler operation and longer life