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I checked everything again, and for some reason it finally works. I have no idea why.
Thank you very much for your support. It seems my first rack, filled with Yusynth modules, is finished. Smile

It to ...

Finaly found some time to do some measurements. Unfortunately my oszi is very bad. Plase note that D3-Q5 is only 1 pike - not 2 like in the picture.

I think the pictures are quite ok, except pin5 - ...

So I tried to measure 14 of U2.. Nothing. I found out that I get signal (a clean square) at the 'left' side of c4 but nothing on the other. I tried 1n and 10n now for c4.

Thank you for the welcome. Yes, I do have an oscilloscope, but just a simple digital one...

I changed:

Q5 back to a F245C
TL074 with a new one
the C4 cap from 1n to 4,7n
the C5 cap 100 n with a new

No result. There is still the same effect. Sad

Hi!

I built myself a quite nice Modular Synth - Yusynth layouts. But this very last module is finishing me off! This is already my second pcb try. Sad

- Noise works well...

The sample rate works, ...

Author	Message
Topic: Sample & Hold Malfunction
Samuxx Replies: 11 Views: 8086	Posted: Sun Sep 25, 2016 10:09 am Subject: Sample & Hold Malfunction Forum: DIY Hardware and Software » YuSynth
Samuxx Replies: 11 Views: 8086	I checked everything again, and for some reason it finally works. I have no idea why. Thank you very much for your support. It seems my first rack, filled with Yusynth modules, is finished. It to ...
Topic: Sample & Hold Malfunction
Samuxx Replies: 11 Views: 8086	Posted: Sun Sep 25, 2016 4:02 am Subject: Sample & Hold Malfunction Forum: DIY Hardware and Software » YuSynth
Samuxx Replies: 11 Views: 8086	Finaly found some time to do some measurements. Unfortunately my oszi is very bad. Plase note that D3-Q5 is only 1 pike - not 2 like in the picture. I think the pictures are quite ok, except pin5 - ...
Topic: Sample & Hold Malfunction
Samuxx Replies: 11 Views: 8086	Posted: Fri Sep 09, 2016 4:00 am Subject: Sample & Hold Malfunction Forum: DIY Hardware and Software » YuSynth
Samuxx Replies: 11 Views: 8086	So I tried to measure 14 of U2.. Nothing. I found out that I get signal (a clean square) at the 'left' side of c4 but nothing on the other. I tried 1n and 10n now for c4.
Topic: Sample & Hold Malfunction
Samuxx Replies: 11 Views: 8086	Posted: Thu Sep 08, 2016 7:32 am Subject: Sample & Hold Malfunction Forum: DIY Hardware and Software » YuSynth
Samuxx Replies: 11 Views: 8086	Thank you for the welcome. Yes, I do have an oscilloscope, but just a simple digital one...
Topic: Sample & Hold Malfunction
Samuxx Replies: 11 Views: 8086	Posted: Thu Aug 25, 2016 4:55 am Subject: Troubleshooting Subject description: changed parts Forum: DIY Hardware and Software » YuSynth
Samuxx Replies: 11 Views: 8086	I changed: Q5 back to a F245C TL074 with a new one the C4 cap from 1n to 4,7n the C5 cap 100 n with a new No result. There is still the same effect.
Topic: Sample & Hold Malfunction
Samuxx Replies: 11 Views: 8086	Posted: Wed Aug 24, 2016 10:48 am Subject: Sample & Hold Malfunction Subject description: No output at s&h Forum: DIY Hardware and Software » YuSynth
Samuxx Replies: 11 Views: 8086	Hi! I built myself a quite nice Modular Synth - Yusynth layouts. But this very last module is finishing me off! This is already my second pcb try. - Noise works well... The sample rate works, ...