Vintage Synth Repair

Hey guys,

Many years back, I played around with the Penfold modular book. I 
built a bunch of circuits, and it worked ok. Not great, but it was a 
fun project.

I've recently dug it out of storage, and would like to do a bit of 
troubleshooting and repair.

I'm wondering if anyone here has poked at this diy design, and if so, 
maybe I can do some brain picking?

I apologize if this is wrong forum for homebuilt stuff, but I just 
tried to join the synthesizerscom group, and was denied. Possibly 
because I own a commercial studio? Not sure.



Thanks,

Jim