J Rockett - The Dude (gut Shots)
It's just me, or there are too many OP Amps in there?
- alexradium
- Resistor Ronker
for a chicken brain...induction wrote:Too many for what?
- MoonWatcher
- Diode Debunker
If it's mostly copied from an existing design, then 3 op amps would be 'just right.'MGaburriJazzDude wrote:It's just me, or there are too many OP Amps in there?
I mean, aren't 6 op amps a lot for a traditional overdrive?
Are we in front of a totally new overdrive topology?
But, thinking about it a bit, it could be that they've used multiple gain stagesin series or something like that. I don't know, i will be amazed if someone told that finaly a boutique manufacture came up with a completely new overdrive design... It would be amazing, wouldn't it?
(Excuse my rough english...)
Are we in front of a totally new overdrive topology?
But, thinking about it a bit, it could be that they've used multiple gain stagesin series or something like that. I don't know, i will be amazed if someone told that finaly a boutique manufacture came up with a completely new overdrive design... It would be amazing, wouldn't it?
(Excuse my rough english...)
- alexradium
- Resistor Ronker
opamp or transistors are used for many different tasks,buffering,clipping,mixing,recovery,high,low or bandpass filters,differential,servo dc....MGaburriJazzDude wrote:I mean, aren't 6 op amps a lot for a traditional overdrive?
Are we in front of a totally new overdrive topology?
But, thinking about it a bit, it could be that they've used multiple gain stagesin series or something like that. I don't know, i will be amazed if someone told that finaly a boutique manufacture came up with a completely new overdrive design... It would be amazing, wouldn't it?
(Excuse my rough english...)
it could be one for input and output buffers,one for clipping,one for tone,one for a gyrator,who knows...anyway there are several pedals that use a lot of opamps,Blakstar and Tech21 most notably.
You're right, i didn't think about it that way...alexradium wrote:opamp or transistors are used for many different tasks,buffering,clipping,mixing,recovery,high,low or bandpass filters,differential,servo dc....MGaburriJazzDude wrote:I mean, aren't 6 op amps a lot for a traditional overdrive?
Are we in front of a totally new overdrive topology?
But, thinking about it a bit, it could be that they've used multiple gain stagesin series or something like that. I don't know, i will be amazed if someone told that finaly a boutique manufacture came up with a completely new overdrive design... It would be amazing, wouldn't it?
(Excuse my rough english...)
it could be one for input and output buffers,one for clipping,one for tone,one for a gyrator,who knows...anyway there are several pedals that use a lot of opamps,Blakstar and Tech21 most notably.
By the way, is there any clue of whats going on in that lil' black box?
Not all the op-amp stages may be in use. IIRC, the Blue Note only used half of a 4558. Another possibility might be a charge pump. Also the Dude's "ratio" control is supposed to be a clean blend. I guess a dual gang pot might be a clue. Just a guess but Rockett has had a lot of success with their Klones.
J.Rockett The Dude schematic from PedalPCB.
Interesting design, has a lot of tone shaping.
So "Ratio" knob is just a regular "Drive"/"Gain", not an actual clean blend as the manufacturer says.
It has a combination of soft and hard clipping.
Active tone shaping with 2N3904 gyrator circuit.
Another soft clipping stage with low frequency control "Deep" is after the volume knob, which is quite strange? So with more volume there is more overdrive.
passive tone "Treble" control on the output.
Interesting design, has a lot of tone shaping.
So "Ratio" knob is just a regular "Drive"/"Gain", not an actual clean blend as the manufacturer says.
It has a combination of soft and hard clipping.
Active tone shaping with 2N3904 gyrator circuit.
Another soft clipping stage with low frequency control "Deep" is after the volume knob, which is quite strange? So with more volume there is more overdrive.
passive tone "Treble" control on the output.
- culturejam
- Old Solderhand
Information
Sort of reminds me of several of the DOD drive circuits with the gyrator and other filtering going on.Oloorin wrote:Interesting design, has a lot of tone shaping.
From the beginning part up to the volume control is very close to the Nobels ODR-1 with a fixed "Spectrum" control.