6 Zenith Type / Number 58 #58 Vacuum Tubes Valves Engraved Stamped Base Lot Of Six May 17 2025 These five Ken-Rad number /

These five Ken-Rad number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U

54 and 60 where minimum (65%) is 40 and 100% is 62

It’s a good pressing of a 1954 performance from right on the cusp of mono high fi

new in box GE 6BK4 / 6EL4 tubes tested to spec on our Paul Hart-calibrated TV7/U

I am playing them in one of my Radio Craftsmen SC-2 monoblocks as I write

6 Zenith Type / Number 58 #58 Vacuum Tubes Valves Engraved Stamped Base Lot Of Six May 17 2025 These five Ken-Rad number /This lot of six Zenith number type 58 stamped engraved base tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. They measured 40, 40, 46, 50, 50 and 55, respectively, where minimum (65%) is 36 and 100% is 56. 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