German YouTube video -- circuit walkthrough and measurements

[oldmacman]

https://www.youtube.com/watch?v=TMCZQt3ghEg

and the follow-on:

https://www.youtube.com/watch?v=B0t6krnjvv4

Have y'all seen this? You can turn on the captions and select auto-translation to English and understand most of it. The schematic is close to the 2nd gen ODS in the files section, with a different (simpler) overdrive entrance.

[martin manning]

Very interesting, thanks for posting. Translation is good enough, and occasionally humorous. Microbikes, yeah?

[chaccmgr]

I know this guy personally. A retired University professor for acoustics and signal processing. He wrote the, to my knowledge, single book about the physics of the electric guitar. He knows the stuff inside out. Wrong adress if you believe in mojo. Difficult personality though...

[nuke]

Good watch, on technical analysis especially.

He only looked at the ODS and critiqued his comments about phase inverters in the GP interview. True enough, the ODS is essentially a Bassman/Twin power amp. But I don't know of any other guitar amp like the SSS power amp.

He seems a bit focused on prices and business practices. But Dumble delivered what he said he would. I don't think anyone ever paid him a bunch of money and didn't get the amp. He spent a lot of time with the artists he built for and a lot of the "secrets" were really, just dialing in the little bits here and there for whatever. There's nothing "secret" in anything electronic, but th

As anyone who's worked on guitar amps for a living, there are more broken amps out there than there is money to fix them. And guitar players are not the best nor easiest of customers a lot of times, even the not-broke ones. As a living, it ain't easy.

[FUCHSAUDIO]

The SSS power amp is similar to many audiophile designs, as well as borrowing design cues from the SVT, depending on the version you see. A PI and a cathode follower can allow drive up into grid current, although the SVT's had a pair of limiter diodes on the front end to stop that.

One SSS design was pretty much an exact SVT rip, right down to using Ampeg iron. Dumble never actually hade anything wound for him, he bought standard Fender iron mostly.