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  1. drew.spriggs

    Desolate fuzz 5v1 sub

    Probably imperceptible unless you were scoping for it.
  2. drew.spriggs

    1590BB2 Ppcb Duocast

    Which version is this for? I'm just looking at a v3 and it's miles out from all the dimensions I can grab from the build docs.
  3. drew.spriggs

    Silica Fuzz properly trimming

    Is your kill switch grounding the signal or just disconnecting the hot?
  4. drew.spriggs

    What's the special nature of Russian 2D503B diodes?

    Seems to be a situation of they look cool and are available in large quantities for pretty cheap.
  5. drew.spriggs

    Power Supply Questions - Reverse Voltage Over Voltage

    Honestly, it's not super important unless you're drawing a high proportion of the total device output - the difference in a few of the models I just compared was 1% voltage variation from 0-100% current draw for regulated vs 10% for unregulated (and the same from min to max input voltage). You...
  6. drew.spriggs

    Power Supply Questions - Reverse Voltage Over Voltage

    If you've got voltage to spare (which you do), you can't beat a single Schottky diode for simplicity and minimal drop; 1N5819s cost nothing, drop minimal voltage and will withstand 40v continuous reversed all day. IMO, reliant on a RC filter these days on the power rail isn't that useful for...
  7. drew.spriggs

    1st attempt at OpAmp..

    Op-amps get biased to roughly half the supply rail - so you want the voltage divider to have two equal(ish) resistors for R1/R2 so the middle of these will be ~4.5v.
  8. drew.spriggs

    Building for a pedal for tour

    I use them exclusively for the workshops I run for beginners. A buck and a minute to solder is massively cheaper/easier than trying to get new solderers to cut/strip/tin/solder multiple cables :ROFLMAO:
  9. drew.spriggs

    Building for a pedal for tour

    https://au.mouser.com/ProductDetail/TE-Connectivity/FSN-22A-6?qs=FFbrrKMnJvzKmHD1yRFm1w%3D%3D Flat stranded, Nomex or Teflon ribbon, specifically designed for movement. Been using them for years with zero issues
  10. drew.spriggs

    Building for a pedal for tour

    The easiest way is (IMO) make things modular as well as bullet proof - separate the sections of the pedal that will see the most abose (jacks, switch, pot) into daughterboards and connect them to everything else with JST-XH's or ribbon cables. If something breaks, swap them over in under a...
  11. drew.spriggs

    Help me make a Drill Template for my own PCB

    If you have 3D models attached to your PCB, export it as a .step file and import to your CAD program of choice. From there it's trivial to create a drill plan. If you don't have 3D models attached, then your best bet is exporting it as a vector image into your vector software of choice and...
  12. drew.spriggs

    Non-opamp Active Tonestacks

    That is exactly what I am trying to avoid...
  13. drew.spriggs

    Non-opamp Active Tonestacks

    No vref as everything else is transistors/CMOS. I can probably fit a single transistor stage with the tonestack, but can't fit a buffer + gain recovery stage. Even if I put an op-amp on the other side, I still need half a dozen extra components to use it - and I don't have the room for that.
  14. drew.spriggs

    Non-opamp Active Tonestacks

    G'day. Been noodling through this design and made it up to the tonestack portion. The preceeding stage has a reasonably high output impedance, and I'm running out of board space. It's a CMOS Muff-ish thing, so I've got 3 preceeding gain stages. A solution I found was using an active BMP...
  15. drew.spriggs

    Twin Face 20uf Capacitor

    Well, it will still sound exactly the same - you'll just claim it doesn't :ROFLMAO:
  16. drew.spriggs

    Twin Face 20uf Capacitor

    22 is a standard value and will sound exactly the same
  17. drew.spriggs

    General capacitor questions

    ....so there's zero quantifiable difference between the two brands, but your non-blind hearing test proved there was? Come on bro. At least pretend it's anything but imaginary :LOL:
  18. drew.spriggs

    General capacitor questions

    'Audio' grade is marketing nonsense to sell to schlubs, and most of the technical reasons cited are more of a justification searching for a reason type of deal. I can guarantee that NOBODY can hear a difference by changing a single cap with equivalent specifications when it's just one small part...
  19. drew.spriggs

    Stupid question number 245: bipolar power

    No use whatsoever for a pedal - they're <5.5v in to +/-5v out and not even isolated. This is for an industrial power supply.
  20. drew.spriggs

    Tayda packing and shipping

    Tayda used to be pretty fast, but I've been averaging 4-5 weeks for an order of ~8 powdercoated enclosures. The last lot were stuck on 'in progress' for 3 weeks. When I emailed to ask where they were I was told they were still being painted, but were then marked as shipped 15 minutes later (so...
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