freestompboxes.org

Just found these during my endless search for a OD-820 schematic
May be old news but if not...I just wanted to share .

edit: see revised schem in gorins post below

The tone controls is perhaps a bit intersting?



Another schem. I found was (the not current production) Maxon OD-880. Schematic in this blog->

Maxon OD-880 schematic

Also found this in AG's archive:

Maxon OD-880 drawn by AG

Layout for it here;
http://aronnelson.com/gallery/album76/M ... _XX_LAYOUT

Very different sounding OD.

Hello.
Nice to meet you.
The connection diagram of DS-830 which gorin wrote on September 30, 2006 is a mistake.
I am gorin.

The connection diagram which I corrected.


Inside image


I may misunderstand it.

I am sorry in strange English.

Thanks a lot gori

I removed the schematic with errors

Here are 2 pictures I made these days.
I mod this pedal to a true bypass.

schematic:
https://www.freestompboxes.org/viewtopic ... ilit=maxon

thanks

far out, this *MAY* be the same circuit as the coron d500...i will compare tomorrow!!

Jimi, what did you learn about this?

i gotta find it... theres boxes of pedals around here!!

You might be a Hoarder if....
Jimi I think your house would be a great place to spend a vacation. Bring a tele, an old champ, some good rocking chairs, and lots of those wonderful McDonald's gift certificates everyone receives for Christmas for us to share hot apple pies. and lots of solder

well, if you're ever gonna be in connecticut, look me up, and bring a doobie!!

i have a pretty huge pedal collection, gotta thin the herd some soon!!

It might pay for a vacation or too, I'll bet.
You throw away more good ideas than I build.

i've been lucky, only maybe 10 of the 100+ i've built haven't made it to being boxed.

REAL lucky!!

Here's my (already verified) stripboard layout for DS-830. It's per Gorin's schematic.

Thanks to tagboard bloggers.

I've got a question about that opamp jrc4558D It's hard to get here in holland.Is threre an alternitive for this one.and the 2SK256Y is difficult too.Can i put here something else in with the same specs.

screamingdemon wrote:I've got a question about that opamp jrc4558D It's hard to get here in holland.Is threre an alternitive for this one.and the 2SK256Y is difficult too.Can i put here something else in with the same specs.

tayda will get you 4558's for $0.16 a piece: http://www.taydaelectronics.com/catalog ... ?q=4558+op and their shipping to Europe is so cheap it's almost ridiculous.

The SK246 is a N-channel JFET, and is just used as an input buffer here, so any of the usual suspects (J201, 2N5457, 2N5458, BF245 etc.) would be a suitable replacement. Be sure to check the pinout before you solder it in though

gori wrote:Hello.
Nice to meet you.
The connection diagram of DS-830 which gorin wrote on September 30, 2006 is a mistake.
I am gorin.

The connection diagram which I corrected.
[ Image ]

Inside image
[ Image ]

I may misunderstand it.

I am sorry in strange English.

There is an error in this schematic. C03 must be 3n9 instead of 39n!