Quick question on cap voltage

MartinB

JPF and ICBM, what cap type would be your preference in the hundreds of pF range (tone stack treble caps, reverb coupling caps etc)?  Ceramic, Polystyrene? 
I've been using silver mica in my DIY builds, not for mojo reasons but just because they're easily available and seemed like reasonable quality parts, and aren't all that expensive when there are only three or four in an amp.  I think I'm not likely to change them out in the couple of amps I used them in (unless they fail), but I might go for something else in the next one.  

jpfamps

MartinB said:

JPF and ICBM, what cap type would be your preference in the hundreds of pF range (tone stack treble caps, reverb coupling caps etc)?  Ceramic, Polystyrene? 
I've been using silver mica in my DIY builds, not for mojo reasons but just because they're easily available and seemed like reasonable quality parts, and aren't all that expensive when there are only three or four in an amp.  I think I'm not likely to change them out in the couple of amps I used them in (unless they fail), but I might go for something else in the next one.  

I use ceramic.

Polystyrene has quite a low melting temperature and easy to damage, especially if you are using lead-free solder.

They also used to have quite thin leads on them.

ICBM

Ceramic or polypropylene.