General Electric GE 5U4 5U4GB Vacuum Tube Rectifier Black Plate JANCG6Y6GT (New 12AT7s / ECC81 typically

(New 12AT7s / ECC81 typically test within 1

4 dB (-92 dB is the Maxi-Matcher's noise floor)

It has a banded

MOST OF THE TUBES WE SELL ARE OVER 70 YEARS OLD

They measured 51/51

General Electric GE 5U4 5U4GB Vacuum Tube Rectifier Black Plate JANCG6Y6GT (New 12AT7s / ECC81 typicallyThis new old stock testing GE 5U4GB rectifier tube was tested on our Paul Hart calibrated tube tester for shorts, gas and transconductance. It tested 56 in Section One and 56 in Section Two where minimum (65%) is 40. It has coarsely crenelated round mica spacers; black plates and a side D getter. 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