100ohm resistor on C6 capacitor of Mac 128k analog board

[aroblann]

I bought a dead Mac 128k a while ago and now finally getting around to recapping it. It's been pretty straightforward, except for one capacitor. Noticed that someone added a 100ohm resistor on the negative side of the C6 capacitor on the analog board. Was curious if anyone knew what this was for?

 

[pfuentes69]

In the schematics there's a 100 ohm resistor on the negative side of C6...

 

[aroblann]

Ah, thank you! That helps. I thought it might have been added by the previous owner, but seems that this is just an older board revision.

Found a picture from JDW that seems to have the same modification that mine has:
https://flic.kr/p/2iv8i6n