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SYLVANIA VT-25A / 10Y Singles

SYLVANIA VT-25A / 10Y Singles
VT-25A/10Y is one of the early high vacuum triode tube suitable for use as an audio-frequency amplifier. These Sylvania singles have identical internals with Long Anode Plate w/Oxide Coated Filament, single bottom getter.
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 @ US$ 135,00
Tube -2 @ US$   89,00
 

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