3 Raytheon 21LU8 Vacuum Tubes Valves NOS NIB Lot Of Three UCH81 Nonal 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

This Delco type 80 rectifier tube was tested on our Paul Hart-calibrated TV7/U

O getter) measured 46 where minimum (65%) is 32 and 100% is 49

Etsy will indicate how many tubes are available in this Dutch auction

3 Raytheon 21LU8 Vacuum Tubes Valves NOS NIB Lot Of Three UCH81 Nonal 6SL7s can sub for 6SN7sThis lot of three new old stock, new in box Raytheon 21LU8 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