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Dusting off a Sweet Sixteen, everything look ok?

In the process of ordering parts to rehab the Sweet Sixteen. Went through the boards and compared to the layout diagram and schematic, found a few missing parts.

C3 is listed as a 120pF cap, it looks like a Mica, but could be a film? Any particular voltage rating? Reason for replacing, slightly discolored.

Also going to replace C42/31/20/9, missing on a couple of the boards. Listed as 068-.1uF. Any reason for a range, and what should I shoot for? Mica type I'm guessing, what voltage range?

Thanks!
 
There have been many production revisions to the Sweet 16 along the way. Makes it look as if they score a pallet of one capacitor, use it until they're gone and then revise the setup to suit the next equivalent part they score in bulk for cheap.
I would suggest duplicating what you find in place, rather than relying on a diagram. It may or may not reflect the combination of pieces in your amplifier.

The Texas Star amplifiers have been in production for decades. Plenty of time for the exact design to change a dozen or more times.

73
 

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