Audion Premiere Silver Knight phono

Good morning,
asks gently, a helping hand of a technical nature, if possible.
I have nearly finished a repair on a preamp Audion Silver Knight Premier but remains only an electronic component, probably a transistor which do not know the exact code, as it has been deleted from the manufacturer.
Specifically, it is a transistor, phono input, which is connected directly to the output cathode of the first amplifier tube (6922).
Do you know the signs of this transistor?, Or something equivalent? Maybe a wiring diagram.
I could finally finish the repair trick that preamp.
Thank you, in advance, for the time that you can give me,
Sincerely,

andrea

P.S. sorry for the English unclear.