Matched Trio Raytheon 5Z4 Vacuum Tubes Rectifiers Lot Of Three 7025 NOS NIB Transconductance measured 56/56 for Tube

Transconductance measured 56/56 for Tube One and 58/58 for Tube Two where minimum (65%) is 25/25 and 100% is 38

GM-BRANDED 6SK7 tested as good on our Paul Hart-calibrated TV7/U

copper support rods and gray plates

6 volts on the filaments

Matched Trio Raytheon 5Z4 Vacuum Tubes Rectifiers Lot Of Three 7025 NOS NIB Transconductance measured 56/56 for TubeThis matched trio of Raytheon 5Z4 rectifier tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. They tested 51 52, 54 53 and 54 55, respectively, where minimum (65%) is 40 40. They have 280 739, 280 739 and F1 date codes, respectively. 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