I don't know the answer to your question, but i'm interested to try this for myself.
I externalised the transfomer, which is now hardwired to the board. It does take away a little from the user-friendly nature of the deck to have to grub around on the floor to turn it on and off. If the power switch is a simple two pole switch, I'd guess it just needs to break the positive side of the feed. Not sure why the lead needs a fast blow fuse or a resistor in series inside of the deck - I'd rather put it in the PSU case. Not sure if there are any issues with using a mains-rated switch for low voltage switching - contact resistance maybe?.
Regards,
Alex
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