5 Sylvania 7X7 XXFM Vacuum Tubes Valves NOS NIB Lot Of Five 19D8 T14 They are dead quiet when

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

This matched pair of RCA 6FQ7 / 6CG7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

These five US-made 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 55 while Tube Two measured 60

Plates: black/dark gray rounded plate

5 Sylvania 7X7 XXFM Vacuum Tubes Valves NOS NIB Lot Of Five 19D8 T14 They are dead quiet whenThese five new old stock, new in box Sylvania 7X7 tubes tested to spec on our Paul Hart calibrated TV7 U. One is simply labeled "XXFM." 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