VT-25 / 10 Sylvania and Hytron Singles

VT-25 / 10 Sylvania and Hytron Singles
One of the early high vacuum triode tube suitable for use as an audio-frequency amplifier. We have 4 single tubes as seen in the pics. These are all Thoriated Tungsten Filament type with the warm bring glow that looks really stunning in any audio amplifier. These tubes have been tested on the Amplitrex AT-1000 tester with reference to the following manufacturers tube data :
Va = 250v
Vg = 18,5v
Vh = 7,2v
Ia = 10,0mA (corresponding to 100%)
Test scores are labeled on the bases.
Prices : 
Tube-1 : Sylvania VT-25 w/dual bottom getter @ US$ 89.00
Tube-2 : Sylvania VT-25 w/single bottom getter @ US$ 69.00
Tube-3 : Hytron VT-25 w/single bottom square getter @ US$ 89.00
Tube-4 : Hytron VT-25 w/single bottom drum getter @ US$ 99.00


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