Uberschall Build - Blocking Distortion!

[craigmillard]

C8 is currently 1.5nF as is c4,5 and 13 i also tried removing c9:)

[craigmillard]

i just realised i have also lowered c5 to 1.5nf which is part of the capacitor divider network! i have upped that to 3.2nf and it seems much better:) now to remove some of the other changes and see if it makes a difference!!

Thanks for the help guys, will update once i know i got it all sorted

[Johan]

R18 should probably be on the other side of r17 if this is a hotroded, ultimate Marshall type amp

[J0K3RX]

That schematic you have is correct... have you measured voltages? Some pics would be helpful..

[crazynutz]

I know this old, but it might be helpful to someone browsing through.

I mod MTS modules, and while building an uber module I ran into this exact same problem. The problem was I was using mallory 150's (similar to the mojo dijon caps). I looked at gutshots of a real uber and it uses a combination of Orange drop 716p, and polypropylene capacitors. Basically you need to use mostly polypropylene capacitors.

I ended up using mostly 716p's  a  mallory 150 in c10/c9 for a little warmth.

[J0K3RX]

Good info! Have you tried to remove C9-22n output/coupling cap and leave just C10-2n2? Makes it tighter sounding vs fat. Put it on a switch, of course..