FYI, I've been working on an all-in-one fender clean amp that fits in a 125B. I haven't shared it yet but it is very close to finished and is being tested by a couple other folks. It has The following independent modules on one PCB:
- jfet fender style preamp and it is EQ matched to a real fender preamp.
- AMT series II cabsim.
- Clean amplifying stage to come up to line level to drive a TPA3118 piggy-backed onto the PCB.
- Balanced line driver for send to a PA.
It also has some options for power supply. If using a TPA3118, then it's powered by 20 to 24VDC, 2 or 3A that is stepped down to 15V for the jfet preamp. If not using a TPA3118, then can use direct 15V power or can install a voltage doubler to power with 9V.
The PCB is finished and have built a few examples and have a few PCBs. Eventually, the plan is to share the PCB at PCBway. But, I don't yet have a build document.
Here's an early rev of the PCB populated but not with a TPA3118 power amp. It's not a beginner project... Uses small 1/6W resistors and alpha 9mm pots. Each module on the PCB is separate so you decide what to wire up. If anyone is interested in building, PM me. One other builder and I are building now and creating build documentation.
View attachment 124947
View attachment 124948
Here's one with a TPA3118 and send/return jacks.
View attachment 124952