6 Sylvania 6BQ6 6BQ6GT 6CU6 Vacuum NOS NIB Lot Of Six Telefunken NOS NIB 6SL7s can sub for 6SN7s

6SL7s can sub for 6SN7s in some amps but I do not recommend experimenting as they have very-different bias voltages

new in box US-made 12K5 tubes tested to spec on our Paul Hart-calibrated TV7/U

This milspec (US Navy) Ken-Rad CKR-78 / type 78 tube tested to spec on our Paul Hart-calibrated TV7/U

These four US-made 6SF7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

I have played them with adapters (not included) in my Radio Craftsmen RC-2 monoblocks and they sound outstanding

6 Sylvania 6BQ6 6BQ6GT 6CU6 Vacuum NOS NIB Lot Of Six Telefunken NOS NIB 6SL7s can sub for 6SN7sThis lot of six new old stock, new in box Sylvania 6BQ6 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 COVERS