Schematic\design question

[rutledj]

I was poking through the Dumble files and found a schematic that featured a normal D style circuit along with a Fender style preamp. It was channel switching so you could choose between which preamp you wanted. I've since been back and can't seem to locate it. Can anyone point me to that and do you know if it was ever built and how well that worked?

I like the idea of having two different clean preamps to choose from.

Also, can anyone tell me what program the .sch files require. I downloaded the Eagle software but they won't open them.

Thanks,
Rut

[dorrisant]

Idk about the schematic you are looking for, but the .sch files are likely created with ExpressPCB.

https://www.expresspcb.com/

[GAStan]

Try here, bunch of .sch files with descriptions fitting what you're asking for. I can't open .sch files on m phone so can't verify they're the ones you're looking for.

https://ampgarage.com/forum/viewtopic.php?f=5&t=17500