Members kismet78 Posted May 27, 2008 Members Share Posted May 27, 2008 haha oh my bad no dogs. not meant to be hostile i just figured you read the first couple of posts then posted.yeah i find that having no diodes in the first stage paired with something else is more my forte'. Yeah, that's a good one. All the mojo is in the second set. Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 27, 2008 Author Members Share Posted May 27, 2008 its interesting to see how the clipping characteristics change depending on what you have selected. there are certain combinations that are radically different from others and its cool to see what they are. lots of very usable tones. Link to comment Share on other sites More sharing options...
Members kismet78 Posted May 27, 2008 Members Share Posted May 27, 2008 its interesting to see how the clipping characteristics change depending on what you have selected. there are certain combinations that are radically different from others and its cool to see what they are. lots of very usable tones. Did you mess around with mosfets in the diode loops? Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 27, 2008 Author Members Share Posted May 27, 2008 no, didnt have a chance to do that, but i may tomorrow, when i try out some different resistor values on the emitter of the gain stage for the germaniums. Link to comment Share on other sites More sharing options...
Members amp_surgeon Posted May 27, 2008 Members Share Posted May 27, 2008 I think he's jerking your chain. There aren't any MOSFET's in a Big Muff. EDIT: Unless he meant using MOSFET's instead of diodes in the feedback loop. I don't see how that would work. There are no conventional PN junctions in a MOSFET to use for clipping. Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 27, 2008 Author Members Share Posted May 27, 2008 I think he's jerking your chain. There aren't any MOSFET's in a Big Muff.EDIT: Unless he meant using MOSFET's instead of diodes in the feedback loop. I don't see how that would work. There are no conventional PN junctions in a MOSFET to use for clipping. thats what he meant. i kinda was thinking the same thing. Link to comment Share on other sites More sharing options...
Members amp_surgeon Posted May 27, 2008 Members Share Posted May 27, 2008 thats what he meant. i kinda was thinking the same thing. M'kay. Well, the source and drain of a MOSFET would just act like a resistor. Either source or drain combined with the gate would act like an open circuit. If it didn't, then the MOSFET was blown. You could use the base/collector or base/emitter junction of a regular bipolar transistor, but (as you already know) the voltage drop isn't much different from any regular silicon diode, so the clipping effect would be pretty much the same as you're already getting from the silicon diodes. What you might want to try is ganging PN junctions in series to get different clipping levels. For instance, you might be able to bring up the clipping level of the germaniums by putting two series pairs back to back. This should bring the clipping level up to +/- 600mV. This is only 200mV (peak to peak) less than the clipping level of the silicons, so the volume should be nearly the same. However, the germaniums clip more gently, so the tone should be a little less harsh. Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 27, 2008 Author Members Share Posted May 27, 2008 sounds fun. remind me to install a 0.001uF cap on my sheratons volume pot. treble bleed. do you have any 0.001uf or 0.002uf caps in the drawer? Link to comment Share on other sites More sharing options...
Members amp_surgeon Posted May 27, 2008 Members Share Posted May 27, 2008 sounds fun.remind me to install a 0.001uF cap on my sheratons volume pot. treble bleed. do you have any 0.001uf or 0.002uf caps in the drawer? There are both in the SuperFuzz build kit. There should be extras of each. Link to comment Share on other sites More sharing options...
Members Musickbox Posted May 27, 2008 Members Share Posted May 27, 2008 Does this mod work on the Little Big Muff? Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 27, 2008 Author Members Share Posted May 27, 2008 yes it does. the circuit is pretty much the same, save some capacitor/resistor values. Link to comment Share on other sites More sharing options...
Members ibentmywookie Posted May 27, 2008 Members Share Posted May 27, 2008 clips sound f'ing bad ass. Link to comment Share on other sites More sharing options...
Members kismet78 Posted May 27, 2008 Members Share Posted May 27, 2008 M'kay. Well, the source and drain of a MOSFET would just act like a resistor. Either source or drain combined with the gate would act like an open circuit. If it didn't, then the MOSFET was blown. You could use the base/collector or base/emitter junction of a regular bipolar transistor, but (as you already know) the voltage drop isn't much different from any regular silicon diode, so the clipping effect would be pretty much the same as you're already getting from the silicon diodes. What you might want to try is ganging PN junctions in series to get different clipping levels. For instance, you might be able to bring up the clipping level of the germaniums by putting two series pairs back to back. Link to comment Share on other sites More sharing options...
Members mike.sartori Posted May 27, 2008 Members Share Posted May 27, 2008 The name of this thread changed between pages 4 and 5! Link to comment Share on other sites More sharing options...
Members amp_surgeon Posted May 27, 2008 Members Share Posted May 27, 2008 No chain jerking here. This is what I was referring to:http://www.muzique.com/lab/zenmos.htm Gotcha. That probably wouldn't work here. The clipping diodes aren't in a DC isolated circuit with a ground reference, like they are in many other fuzz pedals. They are in the feedback loops from the collector to base of two NPN transistors. The "body diodes" might still clip, but the gates would be affected by the DC voltage difference between the collector and emitter. If you could provide a good neutral voltage reference for the gates (relative to the source/drain) then you could probably get it to work. If you just tried to slip them in with the gates tied to source or drain then the MOSFET would behave like a MOSFET, and not like a simple diode. Link to comment Share on other sites More sharing options...
Members kismet78 Posted May 27, 2008 Members Share Posted May 27, 2008 Gotcha.That probably wouldn't work here. The clipping diodes aren't in a DC isolated circuit with a ground reference, like they are in many other fuzz pedals. They are in the feedback loops from the collector to base of two NPN transistors. The "body diodes" might still clip, but the gates would be affected by the DC voltage difference between the collector and emitter. If you could provide a good neutral voltage reference for the gates (relative to the source/drain) then you could probably get it to work. If you just tried to slip them in with the gates tied to source or drain then the MOSFET would behave like a MOSFET, and not like a simple diode. That makes sense and now that I look back at the page I see the examples are all ground referenced. I probably should have put 2 and 2 together. Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 27, 2008 Author Members Share Posted May 27, 2008 clips sound f'ing bad ass. thank you! i tired to capture the variety of the selections well. its the gibson ga30 close mic'd with an sm57... Link to comment Share on other sites More sharing options...
Members shooto Posted May 28, 2008 Members Share Posted May 28, 2008 cool Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 28, 2008 Author Members Share Posted May 28, 2008 thanks bud. Link to comment Share on other sites More sharing options...
Members ambient Posted May 28, 2008 Members Share Posted May 28, 2008 This thread has got me thinking about mods I could do to some of my other pedals. Are there any 'one stop shops' in terms of websites for DIY pedal mods? Pulling {censored} apart and messing with whats inside is always fun. Link to comment Share on other sites More sharing options...
Members echodeluxe Posted May 28, 2008 Author Members Share Posted May 28, 2008 theres a couple DIY forums out there. diystompboxes.com for instance. Link to comment Share on other sites More sharing options...
Members echodeluxe Posted July 26, 2008 Author Members Share Posted July 26, 2008 okay, so i will be upping a video doing a little review of the big muff i modded. im going to try some more things and perfect the mod, and maybe i will start doing it for other people. maybe. Link to comment Share on other sites More sharing options...
Members valvestate Posted July 26, 2008 Members Share Posted July 26, 2008 The muff can now sound like an Overdrive. Nice! Link to comment Share on other sites More sharing options...
Members echodeluxe Posted July 26, 2008 Author Members Share Posted July 26, 2008 yeah dude. SOUNDS. i just finished the video and im editing/uploading. soon my friends. soon. Link to comment Share on other sites More sharing options...
Members echodeluxe Posted July 27, 2008 Author Members Share Posted July 27, 2008 the video is uploading. its gonna take like an hour. Link to comment Share on other sites More sharing options...
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