News:

Forum may be experiencing issues.

Main Menu

Maxon 863 schematic?

Started by Drew Hallenbeck, August 23, 2019, 02:01:41 AM

Previous topic - Next topic

Drew Hallenbeck

Anybody know where I can find a schematic for the old Roto Tone 1 from Maxon?
The closest thing I could dig up was the 909 but that's not quite the same.
Building with my daughter and occasionally selling as "Daddy Daughter Pedal Works"
Not for any real profit, just trying to have a self-funding hobby.

somnif

I'd wager its closer to Ibanez's "Phase Tone" (either PT-900 or PT-999). They are also 1-knob affairs and have the same Maxon black-boxed interior. Even uses similar wording in their descriptions.

Still digging for a schematic but I'd bet its an almost carbon copy of MXR's Phase 90 of the same era.



That's the 900. The 999 appears to be similar with a second trimmer inside for what I think is depth adjustment.

Drew Hallenbeck

Yeah, definitely the same thing as the 999. I'm guessing it's pretty close to the 909 which I did find a schematic for. Just wanna make sure I've got the right one in case there are more than a couple basic tweaks.
Building with my daughter and occasionally selling as "Daddy Daughter Pedal Works"
Not for any real profit, just trying to have a self-funding hobby.

somnif

Found a schematic for the 999 - https://i.imgur.com/v5nkGKT.jpg


from this thread: http://www.freestompboxes.org/viewtopic.php?f=19&t=9424

There is another version of it floating around that I believe is for the re-issue which uses jfet switching. The original unit looked like it was true bypass, hence this fan traced version.