Simplified ODS-101-HRM clean section schematic

Overdrive Special, Steel String Singer, Dumbleland, Odyssey, Winterland, etc. -
Members Only

Moderators: pompeiisneaks, Colossal

Post Reply
esist
Posts: 1
Joined: Sun Oct 07, 2018 7:44 am

Simplified ODS-101-HRM clean section schematic

Post by esist »

Hello,

I am building up a Dumble ODS 101 HRM preamp. To reduce the number of switches and controls of the clean section, I simplified the Skyline Tonestack by removing the PAB, Deep & Bright switch so that they should be all statically off.
My starting point was the ODS-101-HRM Rev1.4 schematic from this forum.

The outcome looks as follows.
dp.png
Now I get far too much bass compared to the original schematic which I have already successfully built. Also a the treble pot has a much too strong effect on the overall volume.
I am not sure if by removing the Deep circuit completely I did the right thing to have a configuration that is "Deep off".

Could please someone help me by a review of what I did and point to any findings ?
Any help is appreciated !!

Thanks to all of you,
esist

The beauty of simplicity !
You do not have the required permissions to view the files attached to this post.
User avatar
martin manning
Posts: 14308
Joined: Sun Jul 06, 2008 12:43 am
Location: 39°06' N 84°30' W

Re: Simplified ODS-101-HRM clean section schematic

Post by martin manning »

Looks ok to me. Maybe you have a wiring error somewhere? The only change I would make is to the mid boost switch wiring, making so that it shorts the 390p cap when mid boost is off.
sonofmickel
Posts: 162
Joined: Sun Jan 13, 2008 4:56 pm

Re: Simplified ODS-101-HRM clean section schematic

Post by sonofmickel »

Nice first post!
Did you ever figure out the "too much bass" problem?
Post Reply