Elektor Formant Modular

When I built my formant in 1977 there was output bleed, I do not believe that aging is the problem. More likely it is the basic design, the output signal is quite powerful. I tried everything to stop the bleed, screened  cables between pcb and output sockets etc etc, all to no avail. 
Eventually I solved the problem by replacing the output potentiometer with a switched pot (push to switch off). I not sure if these type of pots are still available from anywhere but that was the fix.

R_.



--- In ElektorFormant@yahoogroups.com, Gerard Bik <gbik@...> wrote:
>
> Potentiometers in general don't age well. They get noisy. And keyboard switches. :-(
> 
> 
> >interesting tip. im in the same process (restoring an old formant system), and ive noticed some modules that were part of the system work better than others, maybe because of this.
> >
> >any other weak spots to check?  ones that dont age well?
> >
> >thanks,
> >brendan
> >
> >--- In ElektorFormant@...m, Gerard Bik <gbik@> wrote:
> >>
> >> That's a good suggestion. Electrolytics deteriorate with age.
> >> I had to replace every Tantalum condensor in my vocoder. All dead.
> >>
> >> GB
> >>
> >
> >
> >
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