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  1. drew.spriggs

    Supreme Court rules DJ's tariffs illegal

    You guys still think court rulings mean anything? :ROFLMAO: Nothing will happen, nobody will get refunds, they'll keep charging tariffs.
  2. drew.spriggs

    The Enshittification of PCBWay

    EEV blog post mirroring my experiences Their customer support has now been saying for 6 weeks that PayPal is "temporarily down" while they've deleted all mention of it from their website. Payoneer isn't available in Australia, and even then there are some real concerns using it ($20USD minimum...
  3. drew.spriggs

    Power Filter Section

    I always just keep things simple - schottky for reverse polarity protection, then ferrite bead + caps for filtering. Most power supply noise these days is from switching instead of mains, so stacks of resistance isn't necessary for a HPF. Ferrite bead works to suppress switching noise without...
  4. drew.spriggs

    Futzing with FETs

    So there you go. Not a massive difference, and using much less board space. The lower bandwidth of the PP stages is actually advantageous - the rolloff is similar to where the original design has a couple of staggered LPF's before the tone stack, so response is almost identical if I use...
  5. drew.spriggs

    Futzing with FETs

    Just tried both in the sim to see which got closer
  6. drew.spriggs

    Ferrite Beads?

    Pretty much any are going to work in that build - the cheap Tayda ones will be fine (it's just to reduce HF noise into the regulator - it's already got a lot of noise rejection so values aren't critical).
  7. drew.spriggs

    Futzing with FETs

    Howdy, I've been on that FET binge while looking at amp/preamp emulation, and came across the original Foolin' With FETS article which includes a push-pull stage. With that in the back of my mind while I was looking through other schematics, I noticed pretty much just everything uses a SRPP (or...
  8. drew.spriggs

    Capacitor soldered to GE transistor?

    Lawdy that is some hot trash build quality. Cap is to prevent oscillation/take some treble out
  9. drew.spriggs

    Sandspur Fuzz biasing

    Q1 typically - original FF has like +18dB of gain for Q1 (once you take into account the negative feedback), and around +1dB on Q2. You can limit treble if you go too big. Just look at any of the OKF variants - most will have somewhere between 47 and 470pf across Q1, and from 0 to 47pf across...
  10. drew.spriggs

    Sandspur Fuzz biasing

    FWIW, just slap a small NP0 cap from the base to emitter - 22-100pf is typically enough. In the majority of situations it will remove the squeal at max gain.
  11. drew.spriggs

    Benchtop Drill Press Experiences?

    Would making 3D printable jigs to hold various size enclosures so their top surface is perpendicular to the spindle be of use? I've made one myself but could probably whip up some files if others would like them.
  12. drew.spriggs

    Is there a 'better' MOAB-style pedal out these days?

    I mean, the whole thread is about Plexi-sounding pedals lol
  13. drew.spriggs

    Benson Ge Preamp schematic

    The patent is for thermal stability - nothing to do with the rest of the circuit. (It's also just using a thermocouple/heater to keep the temperature stable, which anybody can figure out themselves very easily). Iirc the GE version is just the normal preamp with a temperature stabilised GE BJT...
  14. drew.spriggs

    Aion IVP Preamp switch help??

    If the originals were just bypass switching, you just need 3PDTs if you want an indicator
  15. drew.spriggs

    Is there a 'better' MOAB-style pedal out these days?

    Any idea if the schematic is missing because of some taboo I don't know about? It has been 4 years since the docs were updated. I'm designing my own PCBs, so I'd be eliminating a stack of stuff I don't need (I've already got onboard bipolar power, don't need channel switching, etc)
  16. drew.spriggs

    Is there a 'better' MOAB-style pedal out these days?

    Just found some PCB shots - 3 TO92's + opamp. I'm guessing it follows the similar JFET/mu-amp/op-amp topology that stacks of other pedals follow, along with a LDR for sag
  17. drew.spriggs

    Tips for PCB design?

    Symmetry is overrated...but sometimes you gotta do the aesthetic thing. Honestly, it's pretty hard to make a terrible PCB if you just follow all the basics - avoid long parallel runs, try and keep big ground currents away from a ground plane, lay things out sensibly so you don't have heaps of...
  18. drew.spriggs

    Is there a 'better' MOAB-style pedal out these days?

    This is one I have heard many, many good things about but can't find a schematic anywhere
  19. drew.spriggs

    Is there a 'better' MOAB-style pedal out these days?

    I'll have a listen - not a huge Muff fan but I might be pleasantly surprised!
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