7 Sylvania 3CB6 Vacuum Tubes Valves NOS NIB Lot Of Seven 6GH8 T28 Enhanced Cooling: yes

Enhanced Cooling: yes

I have played them in my Radio Craftsmen RC-2 monoblocks and they are dead quiet when the CD player is paused and have excellent frequency response

These two RCA 6AY3 tubes tested to spec on our Paul Hart-calibrated TV7/U

They measured (from left to right) 51/50

This Sylvania-MANUFACTURED

7 Sylvania 3CB6 Vacuum Tubes Valves NOS NIB Lot Of Seven 6GH8 T28 Enhanced Cooling: yesThese seven Sylvania made 3CB6 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 TO $250 IN VALUE.