4 Ken-Rad Number / Type 58 #58 Vacuum Tubes Valves Engraved Stamped Base Lot Of Four June 20 2025 It is dead quiet when

It is dead quiet when the preamp is muted and has excellent frequency response and sound-staging

These four Philco clear bottle type / number 41 tubes tested as follows on our Paul Hart-calibrated TV7/U:

They were also Apex-Matched with readings very-similar to our own

new in box Westinghouse 6S4A tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Trigon UCH81 tube tested to spec on our Paul Hart-calibrated TV7/U

4 Ken-Rad Number / Type 58 #58 Vacuum Tubes Valves Engraved Stamped Base Lot Of Four June 20 2025 It is dead quiet whenThis lot of four Ken Rad number type 58 stamped engraved base tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 40, 45, 46 and 49 respectively, where minimum (65%) is 36 and 100% is 55. 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