Doepfer

> I'm totally digging the A-143-1. There are so many uses!
> But what would be so awesome is if the AR/LFO "speed" could have
> greater range. I'd love to be able to push the LFO into a much higher
> audio range and slower LFO range. Is there a possible modification
> that might allow this? I would be fine without a range switch, just
> lower and higher values available. If I can't do it myself, I have
> several tech friends in the area who would be able to help me out.
> Any ideas would be appreciated.
> Thanks

It should be possible to increase the range a bit by lowering the values of
the resistors R4 and R5 (both 2k2) which are in series with the control
potentiometers for attack and decay. Adding a range switch is also possible.
You have to switch the capacitor C1 (2u2) between different values. For
example 47n/1u/22u. With these values the ranges are multiples of about 20.
I don't have time to try out lowering R4/R5 as I'm about to leave for the
synthesizer meeting in Kufstein/Austria that takes place this weekend. I can
try out the mod next week. You can find the positions of R4/R5/C1 in the
appendix of the A-101-9 manual (where the modifications of some modules with
vactrols are described).

Best wishes
Dieter Doepfer