Sunday, 16 April 2017

Way Huge Saffron Squeeze MKI

A modified Ross Compressor. Two simple controls sustain and level. Unfortunately, I haven't been able to find a video for the MKI, but as we all know if it's been modified by Mr. Huge it's going to sound great.




Note: There's a cut under D3 to the left of the 1nF cap that's hard to see.

10 comments:

  1. Glad to see this. Can't believe I just started a Ross compressor build a couple of days ago. My timing is off.....

    Thanks for the layout

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    1. anytime, and it happens sometimes. Hoping someone will have some shots of the MKII cause there's 3 additional controls. I'm pretty certain about 2 of them, but need to confirm before I finalize the layout.

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  2. I think the input cap is supposed to be 22nf, not 220nf.

    I don't see how it could sound much different from a standard Ross compressor (except for the 100pf to ground at the input, which will brighten the sound. Keeley puts a 150pf there)

    Thanks for the layout though!! :)

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    1. yea, it was a type-o, fixed it and update the layout. i've actually be able to play a ross compressor against this a few years ago and the few component changes do actually make a fairly noticeable difference. as you may come to notice when looking at a lot of pedal circuits many of them share the same topography with a few component changes, which can transform a pedal in a rather noticeable way.

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  3. Sweet! If you ever get the mkii version figured out, could you add a blend control (with any necessary phase correction)? Thanks for putting this up!

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    1. i don't see why not. the blend would need to be in phase the compressor to work right.

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    2. Nope. The input and output are out of phase with each other due to how the OTA is used (as an inverting amplifier). Due to this, simple(st) blend methods won't work. To get it working right, one needs to blend the input signal with inverted output. There is quite simple method to do this, described here: http://www.diystompboxes.com/smfforum/index.php?topic=40292.0
      I used this to create my 5-knob Keeley mod Ross posted here:
      http://tagboardeffects.blogspot.fi/2016/01/5-knob-compressor.html

      I'd be interested to see an optical design with added blend.
      +m

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    3. I swore I've seen people in the DIY community use a blend on a Ross style compressor. But, I guess I was wrong.

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    4. That's what i was saying. But to simple reverse the phase on basic blend circuit won't do it. Tried that for myself back in the day.
      +m

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    5. Ah. I miss understood. Glad to see it actually is possible, even if it's not with a simple blend circuit.

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