Thank you very much for your help, Florian and Alan, I found the potentiometer on ebay, it is a used one.

best,
Sophie

--- In korg_mono-poly@yahoogroups.com , Alan Dicker <alanmdicker@...> wrote:
>
> Alternatively you could try the seller "Organ parts" http://myworld.ebay.co.uk/organparts&ssPageName=STRK:MEFSX:SELLERIDon ebay he often has the correct original pots.  You shouldn't need to replace the plastic cap but its always good to have a spare or two in reserve.
>
> --- On Mon, 6/7/09, Florian Anwander <fanwander@...> wrote:
>
>
> From: Florian Anwander <fanwander@...>
> Subject: Re: [korg_mono-poly] MG1 knob
> To: korg_mono-poly@yahoogroups.com
> Date: Monday, 6 July, 2009, 8:58 AM
>
>
>
>
>
>
>
>
> Hello Sophie
>
> > I need to replace the MG1 knob, do you know which potentiometer I should get
> > Also, is there something I should be extra careful about when replacing it (I am a beginner at opening synths)
> Do you need to replace the knob (the plastic thing, which sticks on the
> the potentiometer) or the potentiometer itself If it is the
> potentiometer then: what is the failure with it Usually cleaning the
> potentiometer solves the most problems.
>
> If you really have to replace the potentiometer: it is a 10kOhm
> logarithmic potentiometer. Basically it is a potentiometer from the
> company ALPS, which is still available, but unfortunately you won't get
> the exact model with the mounting stands. You may try to find a similar
> potentiometer without the stands, and then put the inards of the new
> potentiometer into the housing of the old one.
>
> Kind regards, Florian
>