Project: Pioneer SA-900

[Super Noob]

It’s been awhile… but those are typical binding posts you can find anywhere online - nothing special. You will need to have a back plate and bevel (by sanding) the rear mounting flanges of the post assemblies to overhang the chassis (in order to fit the tight space).

If you are not mechanically inclined… this may be challenging. Good luck my friend.

 

[taineasy]

It makes sense to replace all the electrolytic caps due to aging, but I don't know why you also want to replace some diodes and transistors. Are they also bad? I would keep them if they don't show any sign of aging. They should have very long service life.

For power supply board D1~D4, if I am to replace them, I would go even higher amp rating diodes. Then I can use a big main filter cap. Your planned 3300uf looks very small to me. It's a 50W+50W amp. Sansui AU-777 is a 25W+25W also cap coupled amp and it uses 4000uf. I would use at least 6800uf.

100% increase in filter cap value? Bold and somewhat risky IMO, even with increased rectifier rating.

 

[Super Noob]

100% increase in filter cap value? Bold and somewhat risky IMO, even with increased rectifier rating.

Electrolytic capacitors from the 1970s generally had much looser, wider tolerance ratings compared to modern components, with a very common tolerance of
-20% to +80%

 

[gslikker]

The smoothing cap in my SA900 is 12000 microfarads.
I do not fear for the power switch, I would if the transformer was a toroid one.