Ants Beresford TC-7520 mods & guide

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Originally Posted by StanleyB

I have been experimenting with an optical encoder to see if it would be possible to get rid of the standard pot in a future design. The software part is however mind blowing for me to get right, so don't expect an imminent solution.

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Hi Stan,

Did you progress the Caiman optical encoder further? Is this something that the new version may go for?

Regards

Chris

Still working on it, and I hope to use it in the next variable output DAC that I manage to complete. One of the things that initially worried me is the feeling that adjusting the volume control level in the digital domain would be inferior than adjusting it in the analogue domain. However I can't find any published research on this assumption. The information that I gathered so far from the web is based on pure hearsay, but no technical experiments to back up any claims. So I am having to do my own research instead of relying on cheap talk. Unfortunately doing my own research takes a lot of time. Too many other things going on at the same time.

On mod #3, do the caps need to be 50V or will 25V 47uF work?