Collosalus Almost Done - Clock Noise

[pk1802]

I finally got around to finishing off my Collosalus. The Holiday season took the wind right out of my pedal building sails.

When I first built this bad boy, I boxed it before I rocked it and it didn't work. I took it apart and found that I forgot to solder one single pin from IC1, which happened to be the pin where the signal goes into it. FAIL.

I got the pin soldered, checked it, and I have sound, and flange. Which supprised me, becuase I bought some cheap 3007s, thinking that for a couple bucks I would give it a shot.

Outside - It's one of the Vein colors from PPP, I bought it so long ago I can't even remember which one.


Inside - Not my neatest wiring, but I already had to take it apart once, so I don't care at this point.



I'm getting some clock noise in the pedal, I didn't socket c22 like the build doc suggested, again, FAIL. Should I desolder and throw some sockets in there and play around with different values? Or is that not the problem? Everything is stock except that I changed out both of the 15uf caps, one is 10uf one is 22uf.

[gingataff]

I had clock noise too, tried a 12v supply and thought it worked but no.

Today I took the plunge and changed c26 to 100uf (you'll need a skinny one) and d4 & d5 to 1n5817s, as per the mods in the pdf. It was no fun getting the parts out, but with a lot of patience, flux and desoldering braid I managed it without losing any solder pads. The pads are a bit misshapen and yellow but the result?

Massive improvelence!

You might as well socket c22, it won't solve your problem but I decided on a 68pf in my build.

[pk1802]

I had clock noise too, tried a 12v supply and thought it worked but no.

Today I took the plunge and changed c26 to 100uf (you'll need a skinny one) and d4 & d5 to 1n5817s, as per the mods in the pdf. It was no fun getting the parts out, but with a lot of patience, flux and desoldering braid I managed it without losing any solder pads. The pads are a bit misshapen and yellow but the result?

Massive improvelence!

You might as well socket c22, it won't solve your problem but I decided on a 68pf in my build.

Yes, since posting, I have made those changes as well. I was still getting some bad clock noise. I switched my power supply out with a transformer based one instead of a Switching mode supply. Vast improvement. As far as I know and have read(I believe Scruffie pointed it out in another thread), this is due to the heterodyning of the different clock frequencies(switching supply, lt1054, and the lfo).

[gordo]

Improvelence.  I'm going to use that.