One Transistor OD/DS (2N3866) Working
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- Posts: 15
- Joined: 05 Nov 2013, 00:18
- my favorite amplifier: Orange Micro Terror
- Completed builds: MXR+ Based Hi-Gain/Low Gain 2 in 1 : "Fallen Angel"
Op Amp Big Muff / Small Time Delay 2 in 1 : "Flying Pork Pie"
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Auto Wah (Dr Quack Derivative)
Systech Harmonic Energizer Clone
Komrade Krunch P1
50W LM3886 Based Amp
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I had a few UHF NPN BJTs laying about (2N3866), they are expensive little buggers but I hate to see them sit around, so I threw together a schematic, tested and refined and here it is, a one transistor overdrive/distortion - and it actually sounds great for what it is.
Initially I had a larger cap on the Emittor, but dropping it down to a 2.2 results in a wicked cool sound at all gain levels.
This circuit should work fine with a 2n3904 as well - but I haven't tested it.
It's basically a diode clipper with a slightly modified Muff Pi tone control sandwiched between the transistor and the clipper diodes.
At high gains, the signal is asymetrically rail clipped at the transistor.
R1 is set to 1.5k, though it could go a little higher or lower if need be.
It's a shame it is inverted, though with a phase shift, but I had it running though a clean 20w tube head and 2x12 and it was actually impressive (for what it is.)
Enjoy.
Initially I had a larger cap on the Emittor, but dropping it down to a 2.2 results in a wicked cool sound at all gain levels.
This circuit should work fine with a 2n3904 as well - but I haven't tested it.
It's basically a diode clipper with a slightly modified Muff Pi tone control sandwiched between the transistor and the clipper diodes.
At high gains, the signal is asymetrically rail clipped at the transistor.
R1 is set to 1.5k, though it could go a little higher or lower if need be.
It's a shame it is inverted, though with a phase shift, but I had it running though a clean 20w tube head and 2x12 and it was actually impressive (for what it is.)
Enjoy.
Last edited by jruddy on 21 Jan 2014, 19:19, edited 1 time in total.
Information
- Posts: 15
- Joined: 05 Nov 2013, 00:18
- my favorite amplifier: Orange Micro Terror
- Completed builds: MXR+ Based Hi-Gain/Low Gain 2 in 1 : "Fallen Angel"
Op Amp Big Muff / Small Time Delay 2 in 1 : "Flying Pork Pie"
TS808
E.A.Tremolo GGG
NPN Si Tonebender II Pro Modded Clone
PNP Ge Tonebender II Pro Clone
Auto Wah (Dr Quack Derivative)
Systech Harmonic Energizer Clone
Komrade Krunch P1
50W LM3886 Based Amp
Big Muff Pi clone
Bass Big Muff clone
Klon clone - Has thanked: 1 time
- Been thanked: 3 times
Note: Because the tone is before the diode clippers it makes it more of a "colour" control than a true tone.
Also - I forgot to put the cap in II with the diode clipper in the schematic. Pick a value between .001u to .022u as per your taste - I used a .0047 in the end.
Also - I forgot to put the cap in II with the diode clipper in the schematic. Pick a value between .001u to .022u as per your taste - I used a .0047 in the end.
Information
- Posts: 15
- Joined: 05 Nov 2013, 00:18
- my favorite amplifier: Orange Micro Terror
- Completed builds: MXR+ Based Hi-Gain/Low Gain 2 in 1 : "Fallen Angel"
Op Amp Big Muff / Small Time Delay 2 in 1 : "Flying Pork Pie"
TS808
E.A.Tremolo GGG
NPN Si Tonebender II Pro Modded Clone
PNP Ge Tonebender II Pro Clone
Auto Wah (Dr Quack Derivative)
Systech Harmonic Energizer Clone
Komrade Krunch P1
50W LM3886 Based Amp
Big Muff Pi clone
Bass Big Muff clone
Klon clone - Has thanked: 1 time
- Been thanked: 3 times
PSpice Simulation Results for POTg = 0k and POTg = 5k
- Bill_Mountain
- Breadboard Brother
1.2V peak-to-peak can bust eardrums. How loud you playing?