> All my oscillators track fine when plugged directly into my
> Kenton midi to cv converter. I patch in an A-170 to use as a
> portamento controller, and 1v/oct goes pretty much to hell. With
> all knobs fully counterclockwise the tracking sucks. Just
> patching it in causes the pitch to drop about 9 semitones.
>
> I have two A-170's, so the odds of them both being busted is
> slim, and they work fine in every other application I use them
> for. The Kenton has portamento, but changing the value is a pain.
>
> So what gives

There were several discussions/answers about this issue:

- Usage of a CV buffer (A-185-1 or A-185-2)
- removing the 1k protection resistor of the A-170 (they cause a small
voltage drop if loaded)

Details concerning the position and shortening of the corresponding
resistors on our website (A-100 DIY page).

Best wishes
Dieter Doepfer