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This is an older project. It is the preamp of the Orange 4Stroke Bassamp in a smaller pedal form:

I've enjoyed playing a Mesa Boogie Bass 400+ amp for a long time. But I didn't want to lug that heavy thing around all the time. So I tried to downsize the amp:

I know this preamp already exists in pedal form, either as a kit, terrible building instructions full of errors or as a finished pedal from dicosimo. But whenever I looked at those pedals, I found the control layout awful. So I decided to build a version based on my ideas.

Here's an example of how some ideas can be implemented more easily by using SMD components. I built my version of the Gallien-Krueger 800RB preamp some time ago: However, I wanted to fit the circuit into a smaller 125B package. Despite a very high packing density and the use of smaller...

I have been using a Fender TBP-1 preamp in my rack for many years. My idea was to simplify the preamp and put it in a pedal. So I used the factory schematics and create a pcb.

After building a 1:1 copy of the Mesa Boogie M6 preamp, I wanted to build an alternative version. I wanted to replace the tube with a JFET circuit.

Does anyone know which diode this could be?

I really like it to play a Traynor YBA-100 or YBA-300 amp. But I wanted it a bit smaller. So I used the factory schematics to create a pcb and to built a preamp:

I built the Century Preamp some time ago. Due to the number of pots I used a larger enclosure: My goal now was to use a smaller enclosure:

Ashly SC-40 Clone I used the factory schematics to create a pcb: Layout enclosure: assembling the pcb

One of my earliest builds was a Sunn Beta Bass (one channel): After that, I wanted to build a "full" Beta Bass Preamp. I used the Factory Schematics to create a pcb: Then I used a milling machine to create a enclosure: done:

After successfully rebuilding my version of the Ashly SC-40, I came up with the idea of converting my long-used Ashly SC-50 into a pedal too. The factory schematics can be found on the Internet. My goal was to fit everything into a 125 BB housing. And everything should be made with conventional...