Author Topic: KLON Centaur way too much treble  (Read 1328 times)

pgodfrin

  • Transistor Tickler
  • **
  • Posts: 90
    • View Profile
Re: KLON Centaur way too much treble
« Reply #15 on: December 02, 2020, 07:31:46 AM »
Well, back to the drawing board. I've reworked the schematic and pcb, in the process of reviewing it. There's so many components in this one, but I managed to get it down to 2x2.75 inches - and yes - two jumpers...
sigh.

pgodfrin

  • Transistor Tickler
  • **
  • Posts: 90
    • View Profile
Re: KLON Centaur way too much treble
« Reply #16 on: December 14, 2020, 10:00:59 PM »
OK Folks, it works! And then it doesn't. Then it works! Really weird I'm not moving it when it stops, it almost seems like something gets hot and it stops, or expands a solder joint? Or maybe a cap is being overloaded? I don't even know what that sounds like, lol.
Anyway, I'll do the usual, check all the solders and reflow where obvious. I'll get the voltages soon enough.
In the meantime, anyone ever hear of something like this?

pgodfrin

  • Transistor Tickler
  • **
  • Posts: 90
    • View Profile
Re: KLON Centaur way too much treble
« Reply #17 on: December 16, 2020, 07:30:36 AM »
Howdy folks! Now I know why checking the voltages is useful. I found that pin 7 on IC1 was really unstable, which led me, along with an audio probe, to a cap. Not sure what the issue was, it measured 1.4 uF (for a 1uF elec) but I replaced it. Voila - got a better signal. Replaced the IC as well and I got a working device. Which really made me happy since this was a pcb design I did myself in eagle from a schematic of the Klon Centaur.

I'd like to refine my etching process, as I found a couple teeny weeny flakes of copper causing shorts. One thing I've been doing is giving more space between the leads, which helps a lot. But, this pcb had so many parts I was forced to compress it a little.

Anyway, all's well that ends well!
peace,
pg

gordo

  • Electron Doctor
  • *****
  • Posts: 2693
    • View Profile
    • Project Website
Re: KLON Centaur way too much treble
« Reply #18 on: December 16, 2020, 10:44:31 AM »
Good to see you got it worked out.  I've had the etching fail as well, where you can barely see a short.
Gordy Power
On lockdown outside of Chicago

pgodfrin

  • Transistor Tickler
  • **
  • Posts: 90
    • View Profile
Re: KLON Centaur way too much treble
« Reply #19 on: December 16, 2020, 05:23:13 PM »
I was play testing it today, and it needs a buffer. I have 3 or 4 pedals before it today - yep - buffer...