Yahoo Groups archive

Cgs synth

Index last updated: 2026-04-28 23:16 UTC

Message

Re: VCO saw shape

2006-03-08 by c10h14no2i

Sorry for the basic question, but which are the offset resistors? The
ones around the tl072 that outputs to the saw out?

If so, I should mention I am using a 270k instead of the 240k, and a
560k instead of the 330k, which is what the elby instructions said to
do. I think everything else is per the schematics.


--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> Usually caused by the signal hitting a power rail and running out of
> anywhere to go. It's what i'd expect to find if an offset resistor
was not
> soldered in propperly (or the wrong value), or some other voltage
> determining part. The name givven to this is "clipping".
>
> Ken
>
> >I got a working scope today, and the saw out of the VCO is very
> >strange. Rather than /|/|/|/| it goes -\-\-\-\. That is the best I
> >can do, but the 1st example should be a normal saw, and the 2nd
> >example, whats going on is that it goes straight up, has a flat top,
> >then slopes down. I tested my paia VCO and the shapes are fine, so Im
> >sure Im using the scope correctly.
> >Any idea what could be causing this?
> >
> >Thanks,
> >Scott
> >
> >
> >
> >
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> _______________________________________________________________________
> Ken Stone sasami@... or sasami@...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.