Wednesday, 23 May 2018

ProCo Solo

From the source:

The SOLO is the newest member of the Pro Co family of stomp boxes. Although it is housed in the same indestructible and road worthy steel enclosure that has come to be a trademark of Pro Co stomp boxes, the SOLO marks a departure from the RAT series of pedals in more ways than just the new cosmetics. With its enormous range of tones, 3 way selectable “hot, melt, & burn” modes, and highly interactive “scoop” and “tone” controls, the SOLO just might be the most versatile pedal in your arsenal.  

Don’t let the name fool you, the 100% analog SOLO is no one trick pony. It is equally at ease in both lead and rhythm capacities, and with a wide variety of amplifiers and guitars. Capable of going from vibey, chewy, warm low gain tones, to deliciously mean and crushing high gain tones, the Solo still remains remarkably true to the sound that matters most: The sound of you and your guitar. And speaking of staying true to the sound of your guitar, true-bypass switching ensures that when the pedal is off, there is no coloration of your sound.  

 Even in its highest gain settings, the SOLO remains extremely tube-like, articulate and touch sensitive. Complex chords ring out with clarity, leads sustain with ease. Roll back your volume knob and it cleans up, just like a good tube amp would.  The solo uses three pairs of carefully matched (or should we say, carefully mismatched) clipping diodes to produce asymmetrical clipping. The three pairs are accessible via the “hot, melt, burn” slider switch. This has the effect of making the SOLO clip very much like a tube amp going into natural power tube distortion.





You'll notice there's plenty of room to add 3 more clipping options if you want to use a 6 position rotary switch.

20 comments:

  1. Bit nitpicky, but why not put Volume 1 on the opposite end of the ground wire? That way vol 1 and vol 3 are on the same side...

    Also, you have Scoop 1&2 wired in, but at the bottom says Scoop 1 to Tone 3. Is that a mistake?

    Sorry!

    ReplyDelete
    Replies
    1. i have a thing about the number of wires on each side of the board, and typically i don't like one side to have more than the other if i can help it. the bottom was a type-o and has been fixed.

      Delete
    2. Understandable. Personally, I like all wires to a pot to be on the same side if possible. I like avoiding wires that have to cross the board. Personal preference, I guess. Like I said, it was nitpicky :)

      Now it says scoop 2 to tone 3... Is that right? Scoop 3 left open?

      Delete
    3. shit, hit the wrong key again. finally fixed it. it should be scoop 3 to tone 1.

      Delete
  2. Thank you so much for doing the layout guys!

    ReplyDelete
  3. Nice job mate, how does it differ from the Rat other than the diode options?

    ReplyDelete
    Replies

    1. scoop pot, pin6 1k and those 100k’s by the input of the circuit differ as well. I’m sure there’s a few other small changes but that’s all I can think off from looking at the layout*

      Delete
    2. It doesn’t seem all that different then a standard rat. The major difference is the scoop pot, which I think shifts the frequencies affected by the tone pot, and has 3 different clipping options. From what I was reading about it’s supposed to be higher gain, more compressed, and some have said it’s much more versatile then the original rat.

      Delete
    3. Great layout BTW! The only differences are the switchable clipping and the tone section. The old tone pot, resistor and cap are replaced by a big-muff-pi style tone control with scoop pot. Gain is the same as is everything else. I love the RAT - it is my go-to distortion pedal - but in all honesty I really don't like the SOLO at all (I have a factory unit). The tone and scoop allow you to dial in a huge range of sounds, so it is more versatile than a stock RAT in that respect, but overall it doesn't quite have the same edge no matter how you set it up.

      Delete
  4. This comment has been removed by the author.

    ReplyDelete
  5. Im assuming an op07 chip can be used as substitute for the 308?

    ReplyDelete
    Replies
    1. The op07 is the IC that the Rats have today. So I think it's okay.

      Delete
  6. Is it possible to add the scoop pot on a normal rat layout?

    ReplyDelete
  7. I think it's not so easy, but maybe not impossible.
    The thing is that the Solo haven't the classic Rat filter pot, but a classic tone control with that scoop pot to adjust the amount of the mid. I tried to edit the layout on my computer, but then I let it go because it was a bit tricky.
    Maybe I'll try again, but try by yourself, too.

    ReplyDelete
  8. do somebody know cmat mods ratified scheme? https://youtu.be/pAevu-yKjWI

    ReplyDelete
  9. Sorry for the stupyd question but im new on this.. where the output comes from vero?

    ReplyDelete
    Replies
    1. Hey man. The output comes off out 2 if the volume pot. All off board wiring that’s not coming directly off the vero is always in the notes at the below the layout.

      Delete
  10. Sounds nice.

    The Tone and Scoop controls add a huge range of tones.

    Made diode changes per schematic found on FSB (Solo with Recovery Stage).

    D1,D3,D4 = 1n4148
    D2,D6 = BAT46
    D5,D7 = Red LED

    The combos with the LEDs sound nice and crunchy, the other is a bit grittier/fuzzier.

    Thanks Zack!

    ReplyDelete
  11. Sorry, I used my own layout. But it started out as the posted layout so it's probably fine.

    ReplyDelete