Gainclone power switch question

[impulz2002]

Hi,

This might be a very silly questions but I'm struggling to find the answer. I know the Gaincard uses a separate switch per channel at the speaker output to "turn it off" leaving the power always on.
Is there a way to turn off both channels with a single switch rated 50V AC, 10V DC? Could I put that between the transformer and PSU so the voltage will be turned off fully every time I switch it off? Or could I connect both GND outputs to the switch before they go to the terminals?
And what's the preference? Leaving the voltage always on the boards or turning it off every time?

Thanks a lot!

 

[NanoFarad]

Try to use a mains AC rated switch before the transformer

 

[impulz2002]

Thanks for your reply. This switch is part of the pot so I was hoping I could use that.
Any idea if that could work?

 

[NanoFarad]

Volume pot? I don't recommend that, instead use a SPST rocker switch like this....
Generic OV17144 10 Piece Mini 2 Pin SPST On/Off I/O Switch 3A 250V AC for DIY: Amazon.in: Industrial & Scientific

 

[tomchr]

You could use a relay driven by the switch. You could also use something like my Guardian-86 or Guardian-686. You would then turn the Guardian on/off with the switch in the pot. That in turns turns the output of the amp on/off.

Finally, by adding a couple of PNP transistors and a resistor, you can control the MUTE pin of each LM3886 with your switch. That would mute the LM3886. It would still stay on but its output would be disabled.

Tom

 

[impulz2002]

Many thanks for this! I'll have a look into the suggestions!