Sunday, 19 September 2021

MI Audio Blue Boy Deluxe Overdrive

 Schematic is avaiable HERE.


...and by request another layout with with mods by asbestosaurus at FSB.
 
R1 and R2 is the suggested values but they can be tinckered with for more or less overall output.
 

 


19 comments:

  1. There's a mistake in the schematic, it's been update.
    The layout needs to change something around the Bright pot.

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    Replies
    1. The layout is now updated, following the uptaded schematic.:-)

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    2. Excellent!
      Thank you, Fuzzhead!

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  2. Oh, interesting design. I will build it to check that comprehensive eq/tone section.
    There is also an improved version in the Freestompbox thread, which I'd be curious to try.

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  3. If I understand correctly, the updated layout is the "original" version, not the one with the suggested mods?

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    1. Yes, the updated layout is the stock circuit.
      I can do a layout for the modified version but we need to decide which resistor values we need for R1 and R2.
      https://www.freestompboxes.org/download/file.php?id=39340&mode=view

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    2. Thank you so much, Fuzzhead!
      I was on the verge of building it tonight, but I would be glad to get less thermal noise from the circuit (if the original poster experienced a noisy pedal).

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    3. It seems that with R1=47k and R2=4.7k, we'd gain around +18dB of gain... how does it sound?

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    4. I'll add an additional modified layout with your suggested values tonight.:-)

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  4. Hello,
    On the second schematic posted on the forum (https://www.freestompboxes.org/viewtopic.php?f=7&t=31576), I see two 220pF capacitors, and no 100pF cap. Maybe I'm missing something?

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    Replies
    1. Yes, it used to be a 100pF and now it is a 220pF. Layout is updated.

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    2. Modified layout is now uploaded.:-)

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    3. Thank you so much, Fuzzhead!

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  5. Fuzzhead, not sure how to contact you? I have a request for a flanger, which I noticed you don’t have. I made a nice clear schematic, if you’re interested.

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    Replies
    1. I agree that a "suggestions" topic might be a nice place, eh eh :)

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  6. Hello,
    You can tag it as verified : I built it and it works fine!
    It's a very nice overdrive pedal with an interesting eq section.
    The only thing is that some knob action seems reversed, but I might have to check my wiring ;)
    Thank you once again for the excellent layout : compact while not too busy, clearly laid out, with a nicely laid out wires.

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  7. Hello,
    I swapped the connections of the 1 & 3 lugs for the tilt (tone) pot and put the bridge on lugs 1 & 2 (instead of 2 & 3) for the character pot, and now it works perfectly :)
    Thank you!

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  8. Fuzz thank you so much for the great layouts. In case do you have crazy tube Falcon layout?
    Thanks a million

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    Replies
    1. I'm afraid not, haven't seen a schematic for that one yet.:-/

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