Recent content by MattG

  1. M

    Buzz Aldrin - BC109 vs BC109C vs BC549(C)?

    🤦‍♂️ Ugh, well, there goes my dignity! Yes, you're absolutely right, the doc plainly says BC109C. I don't know where I got it in my head that it didn't have the "C". (And what's thoroughly embarrassing is that I took the time to link the product page---one more click and I could have easily...
  2. M

    Buzz Aldrin - BC109 vs BC109C vs BC549(C)?

    Looking at the Fuzz Aldrin, the documentation says BC109 transistors. Looking at @Chuck D. Bones guide to Lunar Module / Screw Driver / Hybrid Fuzz Drive modifications, BC109C is listed. Does it matter which is used? Also, the modicum of web searching I did suggests that BC549 is a modern...
  3. M

    Badassium Cmos Overdrive

    @thewintersoldier - that looks great! Thank you for posting the build report. I'm still rocking mine.
  4. M

    Design Challenge #2

    I finally got to play this overdrive through my own amp at volume this past weekend... Thus far I've been using my amp at "family friendly" volumes, or various other random amps at rehearsals. I like how it sounds across all amps, but my own amp cranked up a bit - I feel that's the best sound...
  5. M

    Design Challenge #2.1 - The CMOS Overdrive Deluxe

    @cooder - that looks absolutely fantastic! Thanks for posting the pics. At first I thought it was a bigger enclosure than 125B, all the more impressive how you made it all fit without looking congested. Looks like you're using a soft-switch instead of the mechanical type? And presumably you...
  6. M

    Design Challenge #2

    Bump... anyone else built theirs yet? @zgrav - any thoughts on the one you built? Also, I still have a few boards left if anyone else wants them! I've used mine in several practices now, one backyard party, across several different amps. I'm still enjoying it!
  7. M

    Design Challenge #2

    Awesome, thanks! Note that Chuck's build is with the v1 PCB, so his bass-mid-treble labels are correct. The v1 PCB was the prototype (also has some of the pots wired backwards). My two builds I posted in this thread, and all the PCBs I sent out, are v1.2, and the position of the treble and...
  8. M

    Design Challenge #2

    Looks great, thank you for posting! I like the name, too - definitely more family friendly than some of the earlier suggested names! ;) One small thing I noticed though - on your enclosure, the bass and treble labels are swapped (treble should be on the left, bass on the right). I know...
  9. M

    Design Challenge #2

    Anyone built there CDB cd4007 overdrive yet? I still have several boards available, don't be shy about asking! (Also: I think I'm going to make a revision that additionally has space for a surface mount Q1, allowing you to use either a through-hole or SMD transistor. If you're not afraid of...
  10. M

    Design Challenge #2

    I just finished build #2. I used the alternate values (shown on the schematic and I think also earlier in this thread). I definitely prefer the alternate values with my humbucker guitar. I couldn't make up my mind with my single coil guitar, maybe a slight preference towards the stock values...
  11. M

    Design Challenge #2

    Or how about just "Boner-drive"
  12. M

    Design Challenge #2

    I hate to exclude folks outside the USA, but international shipping is really expensive (and kind of a hassle). Just as an example, the USPS small flat rate priority mail boxes cost just over $8 to ship domestically. I've shipped a few of those to Europe, and it's over $50! For those of you...
  13. M

    What's the Big Deal with Power Supplies?

    Hmm, I always assumed that when pedal power supplies are marketed with "isolated outputs", they meant both power and ground were isolated. Is there any way to isolate both power and ground other than with a transformer? Several years ago, I thought about designing a pedal power supply. (By...
  14. M

    Design Challenge #2

    Hi all, I made the prototype PCBs for this overdrive, and with Chuck's help, fixed some silly issues. I now have a stack of revised PCBs. I'm happy to give these away for no cost, while supplies last. PM me with your mailing address, and I'll drop one in an envelope and mail it to you (USA...
  15. M

    Design Challenge #2

    Hi Chuck, a couple questions about Q1, the PF5102: Will other JFETs work here? In particular, a 2n5457, since I already have some of those on hand? I read your post on JFETs. Previously I've always used JFETs in a paint-by-numbers manner (not knowing any better). For Q1, does the JFET need...
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