[sdiy] sh09 cv out drops again

[Carlos Portela]

Hi all,

After 2 months I turn the sh09 on and the cv out/pitch drops when it
is on VCA hold.

Replaced IC2 lf13741 by CA3140, the fat capacitor, and IC1 4558 with
TL072. the problem persist.

Again removed the 2x 2sk30A GR to test them. After re-solder them the
pitch was stable.
I found that's (maybe) because of the heat from the iron.
10 min later was drooping again.

Also checked the sample and hold from lfo section (last time I
switched the sample n hold FET with the keyboard tracking FET) and
there was a kind of portmento between the played notes...

Any ideas what might be causing this? Bad Fets?