DOD 250 / 308 Vs Ross Distortion / Liquid Drive

[warioblast]

Hello DIYers,
Which one do you prefer ?
I put the DOD 308 on the breadboard this afternoon, it sounds quite good. I messed a little with diodes, looked for mods, and then I saw the Ross Distortion had many similarities...
Does one handle Marshall amps better than the other ?
Cheers,
Fabrice

[petemoore]

  I use
  LM741, not at all noisy in mine, liquid drive has even less.
  BTB diodes are now:
   Si   --->l---
2Si ---l<---l<---
  [I Socketted and messed with diodes/rolloff cap, the combination I settled on, not the only one I liked]
  Variable HF rolloff cap/pot gets used.
  .047uf/Switch/.01uf input caps choices
  Preset gain...but
  [use of <100k pot recomended as gainpot, for finer control over the Distortion portion, I'd use something else for 'clean boost or milder OD tones]
  See the gain/frequency setting section [shown as gain pot and cap to opamp loop] use stock, or whatever modded values here...find reads on these components, post a chosen schematic for further discussion.
   These circuits all share the same topology, and are really just modifications on a theme, all can be made to work using the same circuit board.
   Use of large resistors say for the bias network [2x 1 meg seriesed across the supply rails]...with leads left long enough to...solder smaller bias resistors parallel on the big ones, right atop the board..to bring the bias current to a different level [see schematics for the various values used], IIRC one uses 2x 47k resistors, 'tagging' 56k resistors parallel to the 1meg bias resistors will equate to close enough to the '47k' bias R sound..I just used..some equal value resistors I had there, I think 100k's.
  I used extra sockets, parallel resistors, seriesed caps 'in-wire'..after I got it into a box so I could try it out with [sounds great heavy with OS Comp in front..] my amp and stuff, then final mods from there.
  Dual IC sockets, the final mods, then a bent back matchstick, a few small dabs of glue, the matchstick fold stuffed in the IC socket center, each end touching a component w/glue...to keep the parts in place, permanent 'and' temporary [pulls right out, but hard]. I like to do mods right on the final board.
  Does one handle Marshall amps better than the other ?
  The short answer is: the one that has been tweeked stands the best chance of handling [distorting 'nicely into] whatever amp it is applied to.
  I'd say start with a 741, work with various diodes and cap values, then tweek from there, trying out the tweeks at the amp/etc. settings you'll be using [which may likely be altered to fascilitate the Dist+ type thing..ie it's a discovery process, try different amp settings, or just shoot for a Dist tweek that sounds good the way you already set your amp..].
  Naming your amp and guitar model, your speakers etc..would tell me more about your application, but not near as much as your breadboard tweeking can tell you about how your distortion works for your amp/guitar/speakers/settings/preferences/ears.
  Diode clipping distorter is my main 'go to' sound for a Distortion circuit [lately], that and the FF...and of course the amps sound.

[MartyMart]

Imposible to answer, you'll get 12 people who "prefer" different ones !
.... and who also have different fingers/amps/guitars ...... etc  etc  etc 

Pointless  IMHO
FWIW - I do like the Liquid drive, 308 and Grey 250 also ross dist !!

MM

[warioblast]

I will follow my work on the DOD then. I'll look at the ross later. 
After a few readings, I'm decided to put sockets for the input cap, in & out caps to ground, a rotary switch for the diodes clipping and a switch to choose between the 4.7uF + 10 uF caps and 22uF cap.
I'll see if the input cap needs its dedicated switch 

[MartyMart]

Sounds good, input cap at around 22n to 47n keeps things from getting too thin, but the
other caps mentioned are worth socketting.
The '77 circuit using 2 x 1N4001's is a killer
From all these similar circuits, I find that the Liquid drive gets a lot more use BTW
MM

[WGTP]

http://aronnelson.com/gallery/WGTP/MXR_YJM_DOD250Mods?full=1   

[warioblast]

http://aronnelson.com/gallery/WGTP/MXR_YJM_DOD250Mods?full=1   

It looks interesting but you're too late, my 250 OD is already boxed up. 
The rotary switch; for the diode clipping; takes a lot of space, and I can't even add the mosfet stage.