Ibanez Mostortion/808 Hybrid ?

[MartyMart]

http://www.diystompboxes.com/smfforum/index.php?topic=45480.0

Here's the original thread from May, which I  watched with interest and had
a "half built" stripboard version, hanging around since !
I went back over the thread and realized that the Mostortion was 90% Tube
screamer, just higher gain, proper tone stack and that "wierd" opamp.
I have a few CA3240E's around and the spec is pretty close to a 3260
I ignored the switching and made the "odd" Q1 bias more normal, using
MPSA18's for Q1/Q2

I have to say that it really sounds good, I made C5 a 100n to reduce a bit
more bass through the distortion and used 1N4002 and 1N4148 diodes for
some assymetry.
The best thing about it, is a setting where it's "Just" starting to breakup
which is FAB !  so hard to get from many circuits, there's no diode farting
or any artifacts as chords decay.
Wound right up, it sounds like any other high gainer, but the medium gain
area is beautiful.
Perhaps the use of an "almost bang on" opamp has helped ... who knows ??

Nice info in the thread from STM and Mark ..... as usual

Well worth a build for a fuller/clearer and more adaptable TS sound.

MM.

[JimRayden]

Damn, I just bought a lifetime supply.

*starts shoveling an irrationally large stock of 4558's on a garbage truck*

-----------
Jimbo

[MartyMart]

Here's an mp3 showing the whole spectrum from clean
to medium gain and high gain, hopefully the pick response comes
through !
It's a biggie, so had to make it a 128kbs file.

http://aronnelson.com/gallery/albums/album72/Mos_TS_Hybrid.mp3

Strat -> Mos/808 -> spkr sim -> Mac

Marty.

[WGTP]

Looks like you need some Mosfet clippers for total Mosness.   

[MartyMart]

Looks like you need some Mosfet clippers for total Mosness.   

Your obsessed .... starting to worry me ! 

I guess no one likes the sound ... I know the playing is pretty awful ... oh well, I was thinking that
it sounded like a quite cool OD myself ...

[JHS]

The CA3260E is also a good choise for TS-like circuits and other opamp based distortions.
The CA3260E sounds good at lower gain but nothing better than other opamps at higher gain settings.

The tonestack of the MT-10 is quite common, Marshall used it in their tubecombos in the eighties. It allows better adj. of MID and BASS w less interaction of the 2 pots. Some amp tuner use this configuration too.

JHS

[WGTP]

I mostly use CMOS dual op amps on my breadboard, just in case they do sound more tubish than std. ones, plus the rail to rail cababilities drive the clipper harder, I think.    

[NoFi]

The best thing about it, is a setting where it's "Just" starting to breakup
which is FAB !

Agreed (as far as the mostortion circuit is concerned lol)! 
And it still sounds good on the highest gain settings of your mp3 !

[John Lyons]

Marty

Sounds great! I'm sure it would sound even better through an amp.
Speaker sims are pretty unforgiving with  harshness sometimes but this sounds pretty articulate and without artifacts as you mentioned.
Have you ever tried the "Fat Gnat" that jack orman desinged? That's my favorite overdrive/distortion. Gets a nice cleanish boost all the way to pretty heavy.

John

[MartyMart]

Thanks John, yes it sounds wonderful through a valve amp
I kicked my little DIY 5 watter with it and that sounds gorgeous !
Think I've found a new "medium gain" space on the pedal board ...

...... so many to choose from