> I can solder and can modify electronic stuff safely, but only
> with instructions I'm afraid.
>
> Oh well, I'll keep reading about circuits and I'll figure it out one day
>
> Cheers
>
> Dan

Then simply connect one terminal of the 1k serial resistor to the output pin
(VCO Out or VCF Out) and the second terminal to the tip terminal of the
socket. GND has to be connected to the corresponding terminals of both
sockets. You also find some instructions on the A-100 DIY page
(www.doepfer.com > PRODUCTS > A-100 > DIY page)

Hope this helps

Best wishes
Dieter Doepfer