4 Sylvania 5Z4 Vacuum Tubes Valves Rectifier Lot Of Four The Cultures Of new in box Zenith 25Z5

new in box Zenith 25Z5 tubes tested to spec on our Paul Hart-calibrated TV7/U

likely by GE

Enhanced Cooling: yes

This trio of US-made 6X4 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

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

4 Sylvania 5Z4 Vacuum Tubes Valves Rectifier Lot Of Four The Cultures Of new in box Zenith 25Z5These four Sylvania 5Z4 rectifier tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. They tested 46 52, 49 47, 51 51 and 52 52 respectively, where minimum (65%) is 40 40. 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