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Started by joecool85, December 02, 2010, 01:52:47 PM
Quote from: J M Fahey on December 03, 2010, 12:40:49 AMYes it will. It needs +/-15V (down to +/-9V).It's practically an MXR Distortion+ with a slight buzz filtering (which you may easily add).I'd just build the Dist+, which also has a board and layout already solved , and has higher input impedance (this one is low and will load your pickup somewhat)Or you can build a simplified Turbo-RAT, the one with LEDs.Are you going to drive a TDA something with this preamp?
Quote from: J M Fahey on December 03, 2010, 10:54:34 AMThen use the MXR Dist+ as a base pedal, leave the "gain", bias, etc original, specially because it's already meant to be used with single +9Volts, but modify the clipping and post clipping "tuning" at will.Dean Markleys sound *good*, even the cheapes ones, the guy obviously has ears.I specially like the simplest one, the K15.Driving a 10"/12" speaker and powered with a TDA2050 with +/-22 or +/-25V it becomes loud and club capable in a very simple package.
Quote from: J M Fahey on December 03, 2010, 04:03:49 PMYes. In these circuits you have a gain stage, with an OpAmp and the net of resistors, capacitors and a gain pot around it, and after that a couple clipping diodes in different configurations, resistors, and some capacitors, usually filtering high frequencies (buzz) to ground, plus an output volume pot.You can combine the gain section from one pedal and the clipping/filtering from another.I suggest the MXR one because it's simple yet good, it can provide clean sound by itself (The MXR Boost is just that, a Dist+ without clipping diodes), and the RAT or others can provide more control.
Quote from: phatt on December 04, 2010, 11:35:48 PMHi Joe, Tested it and it does the job well. :tu:Way to fuzzed up for my style so I made a few alterations to make it a little more touch responsive. See Circuit. Did not like the big difference in freq response between the clean and drive so I added a 500p cap across the clean.I did not bother testing the tone section as I have my *PhAbbTone unit* which is darn hard to beat. So yes it could work as a pedal if you change it to a single supply and add a reference voltage.BTW, in my experience hanging a tone control off the end of these circuits never seems to work well.I have had far more success with tone *In front*. Just a thought.Cheers, Phil.
Quote from: J M Fahey on December 08, 2010, 12:18:56 PMYes, often dual leds are red/green so they can produce 3 colors (add yellow)In this circuit they will provide a somewhat asymmetric clipping , not bad.It's the same as using 2 separate ones, or even 2 red ones, adding a 1N4002 in series with one of them.