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  1. darwin999

    SPICE library

    Here is a website with a ton of SPICE & LTspice libraries that might be of use to you: https://ltwiki.org/index.php?title=Main_Page There's a ton of models there, if you look around within it.
  2. darwin999

    Ample Alpaca - less low end and less gain mod?

    Hmm, and I'll also add to my earlier comments. Also note the differences in the feedback loop for the 2nd IC stage in the schematics posted in $9 above - specifically R3 = 1Mohm for GGG, vs the equivalent R4 = 2Mohm for PedalPCB. So there are multiple sources of gain differences.
  3. darwin999

    Ample Alpaca - less low end and less gain mod?

    The GGG version has a difference from other versions - note the difference in where R2 (in GGG schematic) is placed vs the equivalent R3 (in PedalPCB schematic). This clearly leads to gain differences between the two PCBs. For the GGG schematic, w/ the Drive pot minimized, the feedback loop...
  4. darwin999

    EHX OD Glove trace?

    Actually, here is the schematic: https://mirosol.kapsi.fi/wp-content/uploads/2014/09/EHX-Glove.jpg
  5. darwin999

    EHX OD Glove trace?

    I don't have the schematic, but you could compare the vero layouts for component differences: https://tagboardeffects.blogspot.com/2014/07/ehx-od-glove.html https://tagboardeffects.blogspot.com/2012/02/fulltone-ocd-all-versions.html
  6. darwin999

    EOL parts thread

    New EOL announcements by way of Mouser: Central Semiconductor2N5172 PBFREE610-2N5172End of Life Central Semiconductor2N3392 PBFREE610-2N3392End of Life Central Semiconductor2N3416 PBFREE610-2N3416End of Life Texas InstrumentsTLC074CN595-TLC074CNEnd of Life
  7. darwin999

    Where to source those damned Alpha W taper pots??

    Stompboxparts has 100k W pots and 200k W pots w/ center detent, although not from Alpha. Lovemyswitches also has 100k W pots, although not from Alpha.
  8. darwin999

    Are we fooling ourselves when it comes to diode softness?

    Definitely true! A great example is the Fuchsia Fuzz (BJFE Pink Purple Fuzz) with a variable "Clip" pot as the series resistor.
  9. darwin999

    EOL parts thread

    New EOL announcements from Central Semiconductor, by way of Mouser: Central SemiconductorPN3565 PBFREE610-PN3565 End of Life Central Semiconductor2N5172 PBFREE610-2N5172 End of Life Central Semiconductor2N3392 PBFREE610-2N3392 End of Life Central Semiconductor2N3416 PBFREE610-2N3416 End...
  10. darwin999

    My Concrete Jungle buffered bypass sucks

    For those of you building the Concrete Jungle (Free the Tone IF-1D Iron Forest Distortion), Nightfire Electronics has the 2SC3198 for $0.25/ea, although they don't specify the suffix (O, Y, G or L, per Hfe gain sort). https://vakits.com/2sc3198-npn-transistor I haven't seen the 2SC3198 available...
  11. darwin999

    Is it contest time again?

    Why not, I'm in a laughing mode after reading about Mouser BOMs... And no comment on "Robbies"???
  12. darwin999

    Is it contest time again?

    It could be like the Oscars, and have several categories... We could call the awards the Robbies, with categories such as: Most original use of a $5 diode in a 1590LB enclosure Best YATS in a supporting role Best original enclosure design for a shit build Best foreign language PCB Best editing...
  13. darwin999

    Random pix

    Hey, no wonder he's pro-BJ ... they provide immense help with erecting his project! C'est magnifique!
  14. darwin999

    Boutique Pedal Manufacturers Are Feeling the Tariff Pinch

    After looking at Bob's donation record in view of his total lack of awareness regarding the orange guy's tariff plans, I think it's time to introduce him to Tablebeast*. Then our new neurodivergent member can ask Bob why the f### he doesn't publish Mouser BoMs for all *his* pedals. * Check out...
  15. darwin999

    Median Compressor Questions

    Digikey has BAT43 for $0.14/ea or 10/$0.98 https://www.digikey.com/en/products/detail/stmicroelectronics/BAT43/603517 And Mouser also carries them.
  16. darwin999

    Low Gain Silicon Transistors

    The Silica is the Dallas Arbiter Si NPN Fuzz Face, you can find its schematic here: https://fuzzcentral.ssguitar.com/fuzzface.php EDIT: Looks like I'm wrong, it's not the same schematic - sincerely oops...
  17. darwin999

    Saucy box - what is this part doing?

    @giovanni - So I think we agree, although your terminology was probably better. Share the SPICE sim, if you do it. I'm curious why they clip it twice in a row. Those 2 opamp stages have nominally unity gain at low frequencies, and fall off at higher frequencies 1/2πRC ~ 7kHz. Right now I'm...
  18. darwin999

    Saucy box - what is this part doing?

    @giovanni - What I meant by the voltage divider (probably poor choice of words) was there are 2 paths, thru the 100k to the opamps or thru the LEDs to ground. The signal will flow thru the path of least resistance. For audible frequencies, (1) low voltage signals pass onto the opamp, while...
  19. darwin999

    Saucy box - what is this part doing?

    Here's my take. Look at it as a voltage divider, including the 100K to the opamps vs the dynamic voltage-dependent resistance of the LEDs to ground. As noted above, the 10µF is so large that at normal guitar frequencies it just blocks DC. The LEDs are very high resistance until you reach...
  20. darwin999

    Old Solder

    Holy shit! Any of that kind of flux that is left behind (including any fumes which land elsewhere on the circuit) is quite corrosive, I would *not* recommend using this on electronics. That stuff can really chew up your pots down the road. For electronics I am a big fan of Superior No. 30...
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