Doepfer

You've highlighted a condition that's been present in my own 75-
module synth almost from the word GO - pulsating modulation in the 
sound output. It occurs to a greater or lesser degree in virtually 
ALL patches (I have 11 VCOs) - and takesd the form of a cyclic 
variation in amplitude - usually giving the sound a "woo-
woo.......woo-woo........woo-woo" character rather than a straight 
tremolo effect. As I say, this has happened from the humble 
beginnings of a single VCO setup. I now have 5 seperate power 
supplies in the cabinet. I'm a bit doubtful that LEDs are causing it 
in my case, but would anyone have a cure for either of our problems ? 
I notice the previous mailing has been pretty well ignored.
Richard

--- In Doepfer_a100@yahoogroups.com, "stuadh" <stuadh@h...> wrote:
> 
> Hi,
> 
>   I've been reading up on interference caused by LEDs on the 
> power bus in the archives, a problem that I'm having in my 
> homemade and commercial cases.  I've minimised the problem 
> by strategically placing the offending modules, but there was 
> some discussion about including large capacitors between the 
> power rails to help stop this problem occuring in the first place.
> 
>   Has anyone done this, and was it successful? 
> 
>   What constitutes a "large capacitor" and what type.  Does the 
> polarity make a difference?
> 
> Yours Aye
> 
> Stuadh