lookin to build a marshall sounding pedal

Started by lessthanmatt88, July 27, 2005, 10:26:29 AM

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lessthanmatt88

Im looking to build a pedal that will give me a good marshall sounding distortion while being able to sound good on any drive setting and be touch sensitive,

i play a strat through a super reverb and currently have a ts-9 and a fuzz that built based off the fulltone 69' and play a mix of classic/modern rock/ funk type stuff

ive heard the BSIAB 2 is pretty good and works well with fender amps and i liked the sound clips but im wondering if there are any others that you suggest.

thanks

brett

Hi.
You can get that "scooped mids" sound from a variety of pedals.  The hard-driven EL34/84 sound is not so easy to get in a pedal.

I kinda like the whisker biscuit for its Big Muff tone section, which I modify so that it has 2 x 47k resistors.  I also usually bump the 4nF up to a 4.7nF, but lower values give a deeper scoop, which you might want.  3.3nF makes for a canyon around A above middle A (880Hz).  You can check out the frequency response under "Big Muff" in Duncan's tone stack calculator (free download).

cheers
Brett Robinson
Let a hundred flowers bloom, let a hundred schools of thought contend. (Mao Zedong)

lessthanmatt88

not really looking for the scooped mids sound really, what i like is somethign along the lines of AC/DC crunch or the brown sound eddie van halen got, something more along the lines of that

mojotron

Quote from: lessthanmatt88not really looking for the scooped mids sound really, what i like is somethign along the lines of AC/DC crunch or the brown sound eddie van halen got, something more along the lines of that

I have built and modded both the Guv'nor and the BSIAB2. I would recommend either for a Marshall sound, but I would build the BSIAB2 and then the Guv'nor if that did not float yer boat.

The BSIAB2 is more sensitive and really goes for a "brown sound" - not really a Marshall sound, but the Guv'nor is all about a Marshall sound.

brett

Hi.
IMO that crunch can best be had from FETs and MOSFETs.
The Odie might be a circuit to check out.  It has quite high gain, tho, which isn't the old 18 watt marshall crunch.  More the super lead or something like that (not that I've owned a super lead).
The CMOS 4049-based circuits ("tube-like fuzz") can be modified to high or low gain, and probably offer maximum flexibility, but you'd need to be prepared to fiddle one a bit to get just the sound you're after.
Here's a soft-driving starting point for a 4049 circuit:
http://members.optusnet.com.au/~jethro.dog/mypic73.jpg
For more oomph, just increase the 100k resistors next to the 220pF caps and/or decrease the caps to 47 or 100pF.
cheers
Brett Robinson
Let a hundred flowers bloom, let a hundred schools of thought contend. (Mao Zedong)

vanhansen

In addition to the recommended circuits, check out the JCM800 Emulation.  Go to the link in my sig and then to the Projects section.  You'll see it listed there.  

Runoffgroove Thunderchief is another good one which is an emulation of the 100 watt Super Lead.
Erik

Paul Marossy

The Smash Drive with a Marshall tone stack kind of gets you there, IMO.

lessthanmatt88

i like the idea behind that JCM 800 circuit with replacing the tubes with JFETS, ive seen a very similar responses with JFETs and tubes on an oscilloscope, but if thats more of a JCM 800 emulaton, how could i change the circuit to act more as another marshall.... say a JTM45 or something or would that curcuit do pretty much the same

vanhansen

You can do your own emulation fairly easily.  Look at the schematic for a JTM45 and go from there.
Erik

Fret Wire

Don't forget the Sans Amp. It does do a nice Marshall emulation, as well as boogie and tweed sounds. One thing though, it sounds best if the amp is not breaking up. It's own clipping doesn't mix too well with heavy tube break up.
Fret Wire
(Keyser Soze)

lessthanmatt88

if you have used any of these circuits how do they sound throughout thier entire range of gain, were they mainly meant to be played on full gain or can it really do a good job of giving you an full range of good tone,

and by the way, im working on adapting the JTM 45 circuit to use JFET's