Normally I like to keep the blog more about music and relegate my gear stuff to my “Things I Make” page, but this one’s something special!
This is my “Woodchipper” amp design. It’s nothing revolutionary, basically a tweed-era champ with some modern refinements, like better power filtering, a mids boost/modified presence control on the second preamp stage, and switchable negative feedback that adds a surprising amount of versatility.
This is a build report for the amp itself. If possible, I’ll create a build document if you’d like to make one for yourself (or modify an existing champ build), excluding plans for the cabinet, of course, because that was all my dad.
It gets a little gritty but still sounds mostly clean, basically perfect for my music, and it’s not overly loud.
We’ve already taken the amp for a spin: we took it to the blues jam/open mic I go to a lot on Thursday (Bippy’s), before I had painted the faceplate, and it did a great job of hanging with a (respectful) drummer with the volume at noon despite the 5W. That 12″ speaker really helps!
The name “Sakura” is a type of Japanese cherry tree. My dad wanted me to name it Cherry, but I thought that was a little um, not my style.
I filmed a demo:
Updated 12/21/15: I forgot to post the schematic. I also have made a few improvements to the tone control and voice switch since filming the video. Here’s the schematic. If you’d like to hear what it sounds like now, my 2015 FAWM album uses it on nearly every track, including for bass.