Vintage Synth Repair

yeh its in tune with the sound and moves with tuning
knob..it is the last revision with the colored knobs

Cheers, phil.

--- duncan <ferrograph@...> wrote:

> is this noise in tune with the other sounds the
> keyboard makes? you
> say it is affected by the master volume, I think,
> but does it alter in
> pitch with the tuning control? it could be leakage
> from the master
> oscillator through a VCA that's gone bad, or it
> could be chorus-clock.
> does the chorus effect still work properly? (one of
> my favourite
> things on the rs09 is to put external audio through
> this)
> does yours have the huge rocker switches or the LED
> buttons? could be
> the electronics that scan these switches if it's the
> later model. any
> case, check the power supply for failed components
> that could be
> allowing this kind of crosstalk (parasitic
> oscillation) onto the audio
> path. it's a linear power supply in these keyboards
> (thank heavens) so
> it's not likely to be the power supply itself...
> good luck, & don't forget to let us know what turns
> up.
> 
> duncan.
> 
> 



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