Just curious but I found a schematic from an original Dumble. Anyway I gave it to my amp tech (who built my amp from Niks kit) and he identified a number of mainly value changes to a number of components (forgive me im not a tech). So as the OTS isn't my main gig amp anymore, I asked him to source the bits and make the changes. I haven't got the amp back yet but i'll keep you all posted.

Anyone done the same?

Result?

This is a bit ambiguous. What Dumble schematic? Which year?

The Dumbles are NOT actually all unique circuits, but since he built them one at a time, there were tweaks and simple variations. But the ODS evolved through the years and then many were updated with later specs at the artist requests.

The Ceriatone OTS uses a new layout, but most models are the same as any schematic of a real Dumble. Chances are you are doing nothing but modded the amp from one Dumble circuit to another. It's a lateral move, but it's one you should research. You may be modding from a ODS circuit you like a lot to one you don't.

However, if you want the pre-Classic (1st Generation) or Classic (2nd Generation) clean channel, that might very well by your best option, I'm not sure if Ceriatone offers a pre-Skyliner clean channel...I'm not sure if any Dumble cloner does these days. And there may be a reason for that. People really seem to favor the 3rd generation and later ODS circuits, and Ceriatone has those covered pretty well.

If I remember correctly, the OD-2 is based on either the HRM or the BM, which both sound bigger and fuller with more dynamics than the other ODS or OTS circuits; especially the BM

Gregg