Proluxe with Tweedle Dee

Discussion in 'Shock Brother's DIY Amps' started by hackworth1, Feb 13, 2018.

  1. hackworth1

    hackworth1 Friend of Leo's Vendor Member

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  2. hackworth1

    hackworth1 Friend of Leo's Vendor Member

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    This project utilizes the standard 5E3 board from a Boot Hill kit. I wanted to see if I could fit the Tweedle Dee Circuit on a typical board. I also installed an adjustable fixed bias circuit on the left side.
     
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  3. theprofessor

    theprofessor Friend of Leo's

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    Nice, Dave! Great to see that you can fit the Tweedle Dee on a typical board of yours! Cool!
     
  4. screamin eagle

    screamin eagle Poster Extraordinaire

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    What is the tweedle dee circuit?
     
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  5. D'tar

    D'tar Friend of Leo's

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  6. robrob

    robrob Poster Extraordinaire Ad Free Member

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    I like the idea of using a trimmer for the phase inverter balance control.
     
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  7. JD0x0

    JD0x0 Poster Extraordinaire

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    It's fairly common in D style amps (especially with LTPI) and IMO, a major part of one of those 'small things' that makes the Dumbles stand out from 'regular' amps. I have a PI balance pot on my twin, with some other Dumbly tweeks. You can run it clean and get that sustaining feedback-y bloom stuff super easily. The amp just seems to want to blast off. It takes some tuning, though, and I don't have a scope to do it on, so I typically have to tune by ear, for this part. On a scope, you're looking for enough imbalance that the 2nd order harmonics stop being suppressed in the PI. (A perfectly balanced PI will cancel some noise and even order harmonics in the PI) The added even order harmonics in the output section seem to make the amp have much of that 'singing' quality.
     
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  8. Mr Ridesglide

    Mr Ridesglide Tele-Afflicted Gold Supporter

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    Hope we can get a test drive sound clip of this one Dave. Very innaresting indeed!
     
  9. hackworth1

    hackworth1 Friend of Leo's Vendor Member

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  10. hackworth1

    hackworth1 Friend of Leo's Vendor Member

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    Objective to increase clean headroom with more filtering - ergo a 32/32 uF F&T cap can in the rectifier hole. Solid State rectifier is built with four N4001 diodes on a terminal strip to convert AC to DC. A 270 ohm 10 W resistor is in place for the sake of R/C coupling.
     
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