a tube overdrive build for Anthony of the The New Diet and The Regular Fucked Up People. it’s my take on the Mitsumin valve caster with the values i tend to use and a Telefunken 12AX7. excuse the ugliness for this one is just the prototype.
four sections of clean vs. effected total.
[audio:http://abrammorphew.com/notes/wp-content/uploads/2013/02/tube_overdrive_sample_long_02.mp3|titles=Tube Overdrive sound sample]
1) high volume, no tone roll-off, and low gain
2) mid volume, high tone roll-off, and mid gain
3) mid volume, mid tone, mid gain
4) high volume, low tone, high gain
i might add some labels for the pots and contact info, but it’s done for the most part.
a forced contract job for Ryan of Falcon Scott. he’s been having some issues finding an overdrive suitable to his hollow-body guitar. i just got a lot of BS170s and thought this might do the trick. the distortion is pretty squared off on the oscilloscope and crunchy. the left pot is post volume while the right biases the BS170. overall, it sounds pretty good and that’s saying a lot coming from someone who isn’t much into “distortion” (personal bias does make a difference. hah).
a big thanks to Jack Orman at Musique.com for laying out the basis. i modified his schematic a bit to get the “best” results for my ear, but i couldn’t have done it without his work.