err.....anyone know how to make Big Muffs able to work on a Marshall jcm900?

[Mecca-Random-PieMan!!!]

  Don't touch the amp settings, Remove the BMP, and insert a circuit which 'emulates' the clean or cleandirt tone you like [or can tweak to learn to like] to use with the BMP bypassed. This method is least intrusive, and has most advantages, fewest disadvantages IMO.

so where could i buy this circuit mate?

[Mecca-Random-PieMan!!!]

YAY
i fixed my pedal, there was a loose circuit inside it, i just soldered it back together and now its BMP'ing again,
thanx for all the help guys
       Patrick

[petemoore]

MHO, I think that's what's wrong with the modern amps. They make the clean channel too goddamn perfectly clean and the second channel so damn high gain.
  Big Amp Gain/Boost/Dist/OD settingProblems?...Smaller Amp/bigger speaker configuration? [maybe...].
  I never did really figure out how to get from dialed in perfect cleandirt to dirtbox tone on my MkII 50w, or any of the big amps.
  What I suggested would be what came closest for me, a Dist sound on one side of a DPDT, a Cleandirt sound on the other. Dist for me, into tube amp, often involves boost, [to be 'dialed in'], so to make the bypass from Dist level near equal, a boost at least is needed. I began to enjoy a pretty good DIST Sound Switch to Cleandirt or Clean by having 'something boosty, maybe sligthly dirty' on the other side of a DIST effects DPDT Switch [where the bypass jumper would be].
  Now I'm using a ~15w amp 'n two greenbacks, and the 'padded ceiling' [where the amp starts compressing and not getting louder] is low enough to where I can use boost amounts, and DISTBoost amounts to easily alter the harmonic content [tone].
  I bought tube amps for *'tube amp tone' [which turns out is a tube amp with load on it], wasting money on 100w and 50w amps, which I was very rarely able to *'put a load' on [required for them to do what I bought them for]. I could get some of it cranking a 4x12'' cabinet to rafter shaking levels, but the full stack was necessary for the amp to actually 'do' what it 'does'...there was a  time when I had it setup in a warehouse/semi trailer garage, and the amp rig was 'totally 'it', other than that the amps never came close to 'it'.
  Isn't the JCM900 known as an 'industrial strength' amp? Try cranking that thing through a full stack or more of greeenbacks, enough to load the amp...get a different dirtbox, use a dirty cleanbox...custom made for dirtying up the amp setting/sound you'd like to have with the BMP settings, but with it bypassed, and put that on the BMP bypass switch, right where you took the bypass jumper wire off, observing input jack to switch input, switch input to circuit input / output jack to switch output, switch to circuit output wiring.

[The Tone God]

you know mate, thats really rude

I see you are lacking in netiquette. I was polite (did you not notice the "please" ?) and the smiley at the end was a indicator that I was being light hearted about the suggestion as not to hurt your feelings.

Let me give you some simple netiquette suggestions when joining a new community.

1. Read all the FAQs availible on the topic(s). (i.e. GEO FAQ, DIY FAQ, etc.) They are links at the top of the page.

2. Read all the forum stickies. For example the "What to do when it doesn't work" sticky.

3. Make use of the lovely function.

Follow these suggestions next time before you flood, bump, and hijack threads.

Andrew

[petemoore]

1. Read all the FAQs availible on the topic(s). (i.e. GEO FAQ, DIY FAQ, etc.) They are links at the top of the page.
  Finding the well prepared documents takes some looking around [while browsing much good reads answer future questions, allowing the reader to become more 'fluent' and comprehensive when asking questions], but explain very well what 'this' [it may only be a small piece of the effect you want to know about] 'does', using a schematic as example, pictures, charts and other aids to demonstrate functions, how to alter them, what to look for to make them tick or get them to stop ticking, very consicely, accurately, and completely...well many of them rely on the reader having some background, which should get picked up while brousing.
  Often times research must be done, and having one page printed out, and the other on the screen makes understanding both/either page easier. For instance a data sheet and an explanation of how a transistor functions. Applying the 'basic' function of components to a schematic of a circuit [I'm just rambling about active components, caps and resistors mostly].
  See AMZ Labs notebook, and everything else you can find.
2. Read all the forum stickies. For example the "What to do when it doesn't work" sticky. "We cant help you if you don't read ...........^ ........................^.......... might be an apt name for the title of that thread, simply because it is a very important point of truth that is often overlooked. Maybe even a 'light' version would help ...sometimes...for electronics help to work all the time [or as close as is possible], equations that can be 'worked' must be provided. There are other ways than voltage measurements, but they 'sometimes' work, like visual, try them first...
it helps if you kind of know what to look for, the reads are the best way to get that.
3. Make use of the lovely  function.

Follow these suggestions next time before you flood, bump, and hijack threads.
  Spend that time looking for great texts, schematics, charts, examples, circuit fragments involved with the subjects you're interested in. GEO is a great place to start.