Quad 303 & 33 refurbish

[rediceman]

Hello to everyone,

Working on quad 303 & 33 for restoration
there is too much distortion in the sound.
Amplifier about 40 years old
electronic capacitors still appear worth
need to change?

Regards.

 

[6L6]

Yes. Replace electrolytic capacitors. You may need to do more.

Quad 33 preamplifier, Quad 303 power amplifier

Quad 33 Upgrade and Revision kit

Quad 33 and Quad 303

~ QUAD 303 Amplifier modified for general purpose Lab amp ~

 

[rediceman]

Thanks for your answer.
transistors need to be replaced?