if that drek is in my workshop , I would find what's the culprit - without asking and replacing everything .....
that's just plain and simple preamp .......

edit:
with "everything" I meant on everything in PS section ; it certainly needs recap after all those years ....... and you have - what - few more parts , except caps ...
that's just plain and simple preamp .......

edit:
with "everything" I meant on everything in PS section ; it certainly needs recap after all those years ....... and you have - what - few more parts , except caps ...
Why?
Nominal capacitance 1.5 mF, measured 1.9/2.0 mF.
Typical ESR 170 mOhm, measured 120/130 mOhm.
Same advice as "change everything"?
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well - you must confess that novice ( who is asking for schm of simple preamp ) isn't supposed to have ESR meter .... and I couldn't know in which condition they are .....
so - to rephrase my self - for proper repair of preamp - replace all broken parts .....

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