Question about PAB and OD Switches

[ValvElectric]

Hey all,
Looking over some of the various layouts again has got me wondering again.
So I know that the OD and PAB switches on the back panel of many ODS's have a few variations in their wiring, so I was wondering what purpose the .1uf 100v caps on #124 serve and why they weren't featured on many of the later amps?

I know I remember seeing this information somewhere but haven't been able to find it again.

[Deric]

I'm pretty sure they are to help with any popping noise when switching. I've never used them and never had a problem.

[ValvElectric]

Thanks!
Thats what I was assuming, but couldn't find confirmation.
Just out of curiosity, was your build based on an ODS that originally had these caps?

[Charlie Wilson]

Hello, the footswitches also have them.
CW