Yamaha A-500 refurbishment & more?

Hi there,

got this amp in good shape but the age, it's from 1983 and caps may be in the heaven of caps now. (well, do ceramics caps go there?) Former owner said it can't hold loud playback anymore and clips a lot. It drives my headphones nicely but a bit too much highs.
Any ideas of what to do to refresh it, like simple cheap and good big lytics (12000µF!) and or film bypass (got 63V MKTs around) somewhere?
Even simple mods are welcome, I plan to use it as the bedroom amp and as a "in case" amp if I fry a T-amp...



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