Replacing capacitors on 200a, what type are the 0.33uF ones?

[adcbicycle]

What kind of capacitors are C30, C31 and C34 on the 200a? I see they're not polarized on the schematic, so I guess they're not electrolytic. Do I even need to replace them? What are they? Film?  They're those grey horizontal/flat ones in the front right.
Thanks!

[Jenzz]

Hi .-)

These 3 are the filter caps for the pickup's voltage supply, so these are not that critical and normally don't have to be replaced.

But due to their mechanical size (and vibration inside the piano), their solder joints are often prone to breakage. So be shure to resolder all joints of these 3 caps.


Jenzz

[Tim Hodges]

Nowadays their modern equivalents are so small that it would address the lid hitting them. 

Also those caps are going to be at least 35 years old so for 35p each they're worth replacing anyway.

I used Panasonic 0.33uf polyester film capacitors in mine.

They have the necessary 10mm lead pitch (the space between the PCB holes) these can be found pretty much anywhere.

The originals:



The replacements:

[adcbicycle]

awesome. Thanks so much you two!