Boost pedal with four circuits

[gutsofgold]

I'm looking for that boutique pedal that had four different boost circuits in it. You could switch each one on/off. Anyone remember?

[WhenBoredomPeaks]

http://solgrind.wordpress.com/2008/12/13/four-banger-update/ ?

[gutsofgold]

yeah thats it! I'm building something similar and wanted an idea of what four he used.

[kurtlives]

Martin used a op-amp boost he designed, Rangemaster, SHO and MOSFET boost.

[gutsofgold]

Thanks! Think I'll go with a SHO, Minibooster, Rangemaster, and MicroAmp clone. I have no need to stack the circuits or switch them mid-use so I think I'm going to use a Rotary switch and try to work in a single pot for all four.

[punkin]

Wow, what a coincidence. I'm working on something like that right now. I was kicking around an idea to simply step through the effects options with a foot switch. Was also planning to use a common tone stack...maybe a second switchable stack but seems like it could get messy.

Bumpitybump  I'll be keeping an eye out on this build.

[gutsofgold]

shouldnt be hard, only issue is that the SHO uses that reverse log taper pot. I wonder how it will work with just a regular log.

[earthtonesaudio]

shouldnt be hard, only issue is that the SHO uses that reverse log taper pot. I wonder how it will work with just a regular log.

Martin later switched the SHO in that quad boost pedal to his "Crackle Not Okay" adaptation, which performs nearly identical to the SHO but without the crackly pot.  Requires a 1M gain pot instead, but I don't recall if it was linear or log.

[jacobyjd]

I love the 4-banger concept. One of these days I'll build one

I also like the idea of using a rotary switch for the 4 circuits. I don't think it would ever see my pedalboard, but it WOULD see time on my workbench as an experimentation tool. Nothing like a one-stop shop to figure out which booster circuit you want to drop in front of a distortion or fuzz.

[kurtlives]

shouldnt be hard, only issue is that the SHO uses that reverse log taper pot. I wonder how it will work with just a regular log.

Martin later switched the SHO in that quad boost pedal to his "Crackle Not Okay" adaptation, which performs nearly identical to the SHO but without the crackly pot.  Requires a 1M gain pot instead, but I don't recall if it was linear or log.

I think it was a 2M(B) in series with the gate.

[earthtonesaudio]

http://solgrind.wordpress.com/2009/01/08/crackle-not-okay/

[phuzle]

all it needs is a tube boost.

-tube boost
-opamp boost
-mosfet boost
-jfet boost
-ge pnp boost

think the valvecaster, or better yet the subcaster, would be a suitable boost if modified to not get dirty?

[gutsofgold]

I have four circuits lined up but I would like to keep it down to one pot, they all use different values and tapers  I don't think it's possible because in one of the circuits the pot is used as a regular output with lug 1 tied to ground, while the in the Rangemaster the pot is tied to the collector of the transistor.

--LPB-1 (100k Audio)
--NPN Rangemaster (10k Audio)
--SHO (using Martin's crackle not okay, uses a 1M Linear)
--MicroAmp (500k Reverse Audio)

[jacobyjd]

There's no reason why you couldn't use a fixed resistor in place of the rangemaster-style volume control, then add a standard voltage divider just before the output. In fact, sometimes I like that setup better in a RM type circuit, because then you can set the original volume to be fixed where you like the tone best, then preserve that at all volume levels.

[gutsofgold]

Ah thanks, never thought of that. What about the different values? I dont quite understand how using a pot as a voltage divider works in terms of the VALUE. Like how would using a 10k in place of a 100k be any different?