2 General Electric GE 5U4 5U4GA Vacuum Tubes Rectifiers Black Plate Lot Of Two

2 General Electric GE 5U4 5U4GA Vacuum Tubes Rectifiers Black Plate Lot Of TwoThis pair of GE MANUFACTURED 5U4GA rectifier tubes was tested on our Paul Hart calibrated tube tester for shorts, gas and transconductance. Tube One (GE MANUFACTURED, Admiral BRANDED) tested 47 in Section One and 49 in Section Two. Tube Two (GE MANUFACTURED, Motorola BRANDED) tested 55 52, respectively, where minimum (65%) is 40 40. They have coarsely crenelated round mica spacers; black plates and top D getters. WE HAVE SCORES OF THOUSANDS OF VACUUM

top to bottom): 42/34

I am playing them in my Mini Mite 2013 as I write and they sound excellent

5 record cleaner and then played it on my He-Man Rig which consists of a Rega Planar Three with an Ortofon X5-MC cartridge on an RB-300 tone arm with a Valee PA-12B phono preamp / preamp feeding two ArtSound 805 monoblocks

It measured 48 where minimum (65%) is 36 and 100% is 55

new in box Amperex-MANUFACTURED mesh plate 5U9 / LCF201 tubes tested to spec on our Paul Hart-calibrated TV7/U

Plate current measured 9

These seven US-made 6B7 tubes tested as follows on our Paul Hart-calibrated TV7/U:

Tube Two measured 1850/28

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They have 43-L2 and LO date codes

it has a top D getter: a micanol base for resistance to heat

It has no date or provenance codes but says Gt