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Mission Cyrus Pre - A DIY Digital Volume Control
May 27, 2010 at 02:11 PM
Article Index
Mission Cyrus Pre - A DIY Digital Volume Control
Status Quo
Replacement
Integration
Volume Characteristics
Done!

Populating the board was not progressing without issues ... never was aware before, that relay coils can't be used bi-drectional, of course I did reverse their polarity Cry
Pragmatic solution is to populate the relays at the bottom layer side.

Image

The populated PCB mounted into the Pre housing, ready for testing:

Image

First testing is done with an additional preamp in front of the amplifier (might get loud if the volume control behaves unexpectedly), Success! Both channels are working, balanced mode is OK too. Next step is to fine-tune the volume characteristics.



Last Updated ( Dec 06, 2011 at 12:01 AM )
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