6 RCA 1S5 Vacuum Tubes NOS NIB Lot Of Six Beethoven They are dead quiet when

They are dead quiet when the CD player is paused and have excellent frequency response

There were no shorts or gas and they tested as follows:

There is a shield between the triodes for reduced cross talk

new in box RCA 8056 Nuvistor tube tested to spec on our Paul Hart-calibrated TV7/U

The Bottlehead calls for a 12AU7 which is a pretty-different tube

6 RCA 1S5 Vacuum Tubes NOS NIB Lot Of Six Beethoven They are dead quiet whenThese lot of six new old stock, new in box RCA 1S5 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 ITEMS UP