Matched Pair Philco 24 Vacuum Tubes Globe Balloon Mesh Plate 3 Eroica 2531 310 It is dead quiet when

It is dead quiet when the preamp is muted and has excellent frequency response even though this amp was designed for 6SN7s

There was some rumble on Side Four that I found annoying

Their readings are 54

new in box RCA 1DG3 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Philco 24 Vacuum Tubes Globe Balloon Mesh Plate 3 Eroica 2531 310 It is dead quiet whenThese matched pair of Philco 24 globe, mesh plate tubes tested 33 and 34 on our Paul Hart calibrated TV7 U where minimum (65%) is 25 and 100% is 38. 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