Search results

  1. farwest1

    Which way is up/1st pin on this thing?

    Having trouble deciding if the dot on the right or the u-shaped divot on the left is the top 1st pin side of this IC. Any ideas?
  2. farwest1

    68K Resistor and 470p Cap?

    Thanks. I have 62k resistors, no 33ks. Would the 62k work ok? Also, why do you prefer the little yellow caps? I only have the light brown discs, but I'd like to expand my collection.
  3. farwest1

    68K Resistor and 470p Cap?

    Hi all, I have quick questions: 1. Is there a good alternative to a 68k resistor? I forgot to buy them. 2. Also, the circuit instructions call for a 470p cap, but don't specify electrolytic or film. Does it matter? I have electrolytic (a brown disc) not a film box. The circuitboard printing...
  4. farwest1

    Feedbacker?

    Maybe straightforward, but A LOT of soldering. At work on a DBA Reverberation Machine clone, and then maybe onto this one. I wonder if I could isolate the feedbacker part of the circuit and attach it to my favorite fuzz (Zvex Mastotron.) Not a huge fan of the DS-1.
  5. farwest1

    Feedbacker?

    Wow! Thank you—should have used the Google machine. Looks like an intense circuit. Have you built one?
  6. farwest1

    Feedbacker?

    Does PedalPCB have a feedbacker circuit? Something like the FreqOut or Boss’s Super Feedbacker + Distortion? mid love to build one if anyone knows where I could find a pcb. I’m not good enough yet to build a veroboard or design my own. Thanks!
  7. farwest1

    Op Amp Big Muff not working.

    Yes! You win a prize—this solved my problem. Thank you so much. The build docs said to omit CX1 if not doing the modified tone stack. In other docs, this has meant leave it out altogether.
  8. farwest1

    Op Amp Big Muff not working.

    Thank you, yeah I didn't think so. Maybe I got a component wrong (or there's a bad component in there somewhere.) I'll keep looking—hoping someone more experienced than me might be able to spot an error.
  9. farwest1

    Op Amp Big Muff not working.

    I re-flowed all connections. Still nothing. I guess I'll test with an audio probe, but I'll have to build one first. Two other thoughts: did I get the ICs wrong? IC1 called for an RC4558P, I installed a 4558D. In the IC3 spot, a TL072 should work—I used a TL072CP. And: for the switch, I think...
  10. farwest1

    Wire Question(s)

    Is there somewhere to source small amounts of hook-up wire in unusual colors (i.e. not red, white, green, blue, black, yellow) But like orange, pink, purple, light blue? I only need enough for a few projects at a time—don't want to pay for big reels. Also, I find that solid wire is so much...
  11. farwest1

    Op Amp Big Muff not working.

    Yeah. This is my tenth build and the first time I've faced (what seems to be) a cold-solder issue.
  12. farwest1

    Op Amp Big Muff not working.

    Thanks! Can I ask: could a few cold solder joints be the reason I'm getting barely any signal when the pedal is engaged?
  13. farwest1

    Op Amp Big Muff not working.

    Thanks! With a cold solder, is the solder itself ruined, or can it just be reflowed at a hotter temperature and create a solid connection? In other words, do I have to debraid or sucker it and place new solder? Or can I basically re-flow the same solder onto the joint?
  14. farwest1

    Op Amp Big Muff not working.

    I have. No luck. I looked for any shorts from components touching the enclosure. Everything seems clear. My best guess is that I have some cold joints, or over-soldered joints that aren't working. I just don't know how many components I soldered at the low temp—my cheapo iron has an extremely...
  15. farwest1

    Op Amp Big Muff not working.

    Yeah, I think this was the result of the iron temp being too low. The solder wasn't flowing onto the pads quite right, so I increased the amount. Normally the iron is around 325-350ºC. But it had dropped to about 250ºC (it has a dial on the handle that's easy to accidentally turn.)
  16. farwest1

    Op Amp Big Muff not working.

    Thanks Twebb and Barry. I fixed the grounding and re-soldered the volume pot. Still no luck. I did notice that the temp on my iron was set lower than normal. But I'm bad at identifying cold solders. I'm including a few other pics here—maybe you could see if you can spot any other errors? This...
  17. farwest1

    Op Amp Big Muff not working.

    Yup, the led works. I’ll ground the output—thank for the drawing!
  18. farwest1

    Op Amp Big Muff not working.

    I just finished up putting this in the enclosure and—bummer, it doesn’t work. I get full guitar sound in bypass, but barely any sound when engaged. Just very faint (and doesn't sound distorted.) The build is actually an Aion Electronics Muff—PedalPCB version was sold out. It allows for either...
  19. farwest1

    1W Resistors instead of 1/8 or 1/4?

    I'm building an op-amp Big Muff. I forgot to include 1/8 or 1/4W 220K resistors in a recent order. I do have some 1W—they are huge, but I can fit them in the circuit. Is it ok to use them? Thanks!
  20. farwest1

    Film Cap Polarity?

    Thanks, yeah. That’s what I figured. Just wanted to make sure I wasn’t missing some detail.
Back
Top Bottom