Tube Overdrive

rockman2004 · 17th September 2005, 08:17 AM

I am thinking about building a tube overdrive pedal.
I want to use a clean amplifier with it. So I want it to have a metal
sound and the output should be about as strong as the output from a
guitar. What I mean is that the sound should get overdriven and then
the output should be reduced to the guitar level.
If anybody has some schematics, please post
them if you can.

Thanks,

Andrian.

Geek · 17th September 2005, 11:47 AM

Hey Rockman, we meet again!

No luck with an OD yet?

Here's an idea - a straight 12AX7 (countless schematics out there) run in "starved plate". Instead of the usual 100+ volts, run it with 40V or so

Brett · 17th September 2005, 04:17 PM

http://www.dogstar.dantimax.dk/tubestuf/mctube.htm

Cassiel · 19th September 2005, 11:16 AM

Hi Geek,

Have you tried it? I mean running the 12ax7 with 40 volts. I say this because i have build the Mctube posted by Brett and then i've tried replicating the pre section of a champ amp with 175 volts in the plate. Both left me umm... they're ok but not great. Then i read Broskie tried that starved plate thing for a guitarist friend and it worked...some great distortion sounds and also trying difference valves brands made BIG differences in the sound thing which did not happen running the 12ax7 with high voltages. Sounds fun.
Have you got any schematic?

Al.

Geek · 19th September 2005, 11:27 AM

Hi Stalker,

Yes, I have used a 12AX7 at 35 and 40 volts and the sound was similar to the OD in a little Crate practise amp.

Unfortunately, I do not have a schematic - it was just some "breadboard tomfoolery" done one night a long time ago

beamnet · 19th September 2005, 12:23 PM

I made this one.

I'm not a guitar player, but i made it for my brother, who is quite happy with it.

easy to breadboard if you have a 12 volt ps..

bas

17th September 2005, 08:17 AM	#1
rockman2004 diyAudio Member Join Date: Sep 2005	Tube Overdrive I am thinking about building a tube overdrive pedal. I want to use a clean amplifier with it. So I want it to have a metal sound and the output should be about as strong as the output from a guitar. What I mean is that the sound should get overdriven and then the output should be reduced to the guitar level. If anybody has some schematics, please post them if you can. Thanks, Andrian.

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17th September 2005, 11:47 AM	#2
Geek diyAudio Member Join Date: Sep 2004	Hey Rockman, we meet again! No luck with an OD yet? Here's an idea - a straight 12AX7 (countless schematics out there) run in "starved plate". Instead of the usual 100+ volts, run it with 40V or so

17th September 2005, 04:17 PM	#3
Brett diyAudio Member Join Date: Jan 2002	http://www.dogstar.dantimax.dk/tubestuf/mctube.htm

19th September 2005, 11:16 AM	#4
Cassiel diyAudio Member Join Date: Sep 2004 Location: Madrid	Hi Geek, Have you tried it? I mean running the 12ax7 with 40 volts. I say this because i have build the Mctube posted by Brett and then i've tried replicating the pre section of a champ amp with 175 volts in the plate. Both left me umm... they're ok but not great. Then i read Broskie tried that starved plate thing for a guitarist friend and it worked...some great distortion sounds and also trying difference valves brands made BIG differences in the sound thing which did not happen running the 12ax7 with high voltages. Sounds fun. Have you got any schematic? Al.

19th September 2005, 11:27 AM	#5
Geek diyAudio Member Join Date: Sep 2004	Hi Stalker, Yes, I have used a 12AX7 at 35 and 40 volts and the sound was similar to the OD in a little Crate practise amp. Unfortunately, I do not have a schematic - it was just some "breadboard tomfoolery" done one night a long time ago

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