Channel switching in a 50 watt
Moderators: pompeiisneaks, Colossal
Channel switching in a 50 watt
Folks, would someone be kind enough to look at this schematic for me, and offer some suggestions about how I might improve the channel switching that I would like to implement in this 50 watt amp? My goal is to build a sort of Plexi hybrid here, with channel switching and a VVR. Any suggestions would be most welcome. Thank you !
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Re: Channel switching in a 50 watt
I think that is going to have a huge pop when you switch channels.
If it was me doing this I would remove that relay and remove the .1 cap.
Then, I would use LDR's and have them set up to ground the wiper of the pots. Either ground one wiper or the other, or even have it set up to unground both. That way you would have A, B, or Both. It should be silent or nearly so if using LDR's.
If it was me doing this I would remove that relay and remove the .1 cap.
Then, I would use LDR's and have them set up to ground the wiper of the pots. Either ground one wiper or the other, or even have it set up to unground both. That way you would have A, B, or Both. It should be silent or nearly so if using LDR's.
Re: Channel switching in a 50 watt
There's a DC path to GND on the NC and NO sides. I might add a 10M to GND from the COM terminal.
You don't show the coil supply or switching, so I'll go with the general observations
- put a diode across the coil so it's reverse-biased, and consider a 0.1uF cap as well. These will trap the 'flyback' current that can otherwise induce voltages onto the switching terminals.
- use a 'signal' relay and not a power relay - the Omron G5V-2 series is good, but there are plenty of others. I suggest going for one of the 'sensitive' versions - lower coil current is a generally good thing.
Hope this helps!
You don't show the coil supply or switching, so I'll go with the general observations
- put a diode across the coil so it's reverse-biased, and consider a 0.1uF cap as well. These will trap the 'flyback' current that can otherwise induce voltages onto the switching terminals.
- use a 'signal' relay and not a power relay - the Omron G5V-2 series is good, but there are plenty of others. I suggest going for one of the 'sensitive' versions - lower coil current is a generally good thing.
Hope this helps!