Joe Davission Overdrive/Distortions

WGTP · August 13, 2012, 12:00:32 AM

After trying the best this forum has to offer in distortion/overdrives, I don't know why the interweb isn't full of people using the Obsidian and Vulcans. I guess it is because they are different. Still, easy to build and sound GREAT.

http://diystompboxes.com/analogalchemy/

J0K3RX · August 13, 2012, 03:30:32 AM

Quote from: WGTP on August 13, 2012, 12:00:32 AM
After trying the best this forum has to offer in distortion/overdrives, I don't know why the interweb isn't full of people using the Obsidian and Vulcans. I guess it is because they are different. Still, easy to build and sound GREAT.

http://diystompboxes.com/analogalchemy/

Agreed!

Ronan · August 13, 2012, 06:07:50 AM

Some nice Vulcan clips here:

http://www.diystompboxes.com/smfforum/index.php?topic=67677.0

Vulcan and Obsidian are now on my breadboard list...

DougH · August 13, 2012, 08:46:24 AM

The Blackfire preamp is good too. A classic!

Mark Hammer · August 13, 2012, 09:17:07 AM

Quote from: DougH on August 13, 2012, 08:46:24 AM
The Blackfire preamp is good too. A classic!

Another thumb up for the Blackfire. Ended up not being my speed, after living with it for a while, but does a very good job at what it does.

Paul Marossy · August 13, 2012, 09:49:30 AM

I built an Amber Drive a long time ago which used a TS271 opamp. It sounded pretty good. I should resurrect that one.

Quackzed · August 13, 2012, 11:48:18 AM

i built the transistor obsidian with 2n5089's really great sounding circuit! its high gain man. in the same veign soundwise as the dr. boogie, or bsiabii.
a true gain monstah!!!

DougH · August 13, 2012, 01:00:19 PM

Quote from: Mark Hammer on August 13, 2012, 09:17:07 AM
Quote from: DougH on August 13, 2012, 08:46:24 AM
The Blackfire preamp is good too. A classic!
Another thumb up for the Blackfire. Ended up not being my speed, after living with it for a while, but does a very good job at what it does.

Me neither, and I don't have it anymore. A lot of this stuff is made for serious shredding. And if you've ever heard Joe's demos, you know he is very capable. So I think a lot of his pedals are designed with that speed in mind.

Ronan · August 14, 2012, 03:13:48 AM

The highway 89 is at the top of my to do list, seems to be a nice one too. Thanks Doug and Joe.

Quackzed · August 14, 2012, 07:29:34 AM

also theres that diode trick to keep the transistor/jfet/mosfet from hard clipping...
something i thought others would pick up and incorporate more into their designs...

mac · August 14, 2012, 04:16:31 PM

Quotealso theres that diode trick to keep the transistor/jfet/mosfet from hard clipping...
something i thought others would pick up and incorporate more into their designs...

I did it with opamps, signal to diode ¡<¡ to (+) input. A 390k from the cathode to gnd and a 470k from Vcc to the (+) input.

Works fine.

mac

roseblood11 · August 14, 2012, 04:56:23 PM

Quote from: Paul Marossy on August 13, 2012, 09:49:30 AM
I built an Amber Drive a long time ago which used a TS271 opamp. It sounded pretty good. I should resurrect that one.

Do you have a schematic? I never heard of that one

Paul Marossy · August 14, 2012, 05:34:42 PM

Quote from: roseblood11 on August 14, 2012, 04:56:23 PM
Quote from: Paul Marossy on August 13, 2012, 09:49:30 AM
I built an Amber Drive a long time ago which used a TS271 opamp. It sounded pretty good. I should resurrect that one.

Do you have a schematic? I never heard of that one

I have it somewhere. It's printed out in one of my binders of schematics for sure, but I don't know where I have it in electronic format. I believe I built that one in 2003.

WGTP · August 14, 2012, 11:05:25 PM

I have redrawn some schematics, like the HWY 89 using Vulcan stages. Also some amp sims.

Paul Marossy · August 15, 2012, 10:17:57 AM

I'll try to round up a schematic for the Amber Boost. It's a single opamp circuit that uses a CMOS opamp and MOSFETs as "clipping diodes". I looked for my circuit board last night and I don't know where it ended up. Guess I'll have to build one again so I can see if I like it or not as my tastes have changed over the years.

This is where I first heard about the Amber Boost circuit: http://archive.ampage.org/threads/2/fxsb/064112/Re_Amber_Boost_Schematic-1.html
The link to the schematic is dead now. I must have built this one in 2001 or 2002.

John Lyons · August 15, 2012, 11:15:06 AM

I have the Amber Boost schematic.
If anyone wants it just email me...

roseblood11 · August 15, 2012, 03:33:25 PM

I'd really like to have it. E-Mail: [my username]@gmx.net
Thanx in advance!

But why not post it here? It would be a shame if Joe's older circuits would get lost over the years!

John Lyons · August 15, 2012, 04:36:00 PM

But why not post it here?
It's not my schematic to post...
I'll email it to you roseblood.

DougH · August 16, 2012, 09:59:25 AM

There used to be a link from this site to an area for Joe's circuits. I don't know if it is still on here somewhere or not.

Paul Marossy · August 16, 2012, 10:28:54 AM

Quote from: DougH on August 16, 2012, 09:59:25 AM
There used to be a link from this site to an area for Joe's circuits. I don't know if it is still on here somewhere or not.

I looked, it's not there.

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Joe Davission Overdrive/Distortions