Here is the final result of the current module, a combined noise and LF398 based sample&hold.
The schematic is a mixture of @EddyBergman Sample&Hold (Eddy Bergman.com: Synthesizer Build part-51: SAMPLE & HOLD new version., based on Renè Schmitz’ work) and the noise source from @Dud (White Noise + Sample & Hold module).
Even its a very simple module it took me quiet a long time due to some mistakes… PCB no. 1 was completely wrong (I designed it under the influence of Novaminsulfon after one week in hospital 
- no good idea). PCB no. 2 worked quite well, but I made some mistakes in connecting the pots and some resistors.
But now its working fine.
for more information please have a look at GitHub - stephanbuergel/Sample-Hold-with-Noise
