/diy/ - Do It Yourself

hey everybody!

a few weeks ago, you may recall me as the anon who was building a switchbox for music purposes. position A of the switch would go to a momentary "on" (n.o.) button while position B would go to a mute (n.c.). The problem I was having was, initially, with the schematic; the real problem was I could still hear a signal from the output when the hot and/or gnd leads were physically separated from the input i.e. mute.

Long story short, after a lot of trial and error, I think it was all a matter of having too much gain on my mixer. What concerns me is I normally use my mixer at or near full blast for shows, so ideally I want something that completely kills the signal on command. I did find that this switchbox actually had less signal passing through than a bare cable, however, so it's not as big of a deal.

I also found something unexpected: when the switch is in momentary on mode, where the n.o. button should be the only button working, the mute button will still make a sound if pressed. I included a pic of my prototype; I can also draw up a schematic if it's too messy.

note: from that trial and error mentioned earlier, I found that disconnecting both hot and gnd leads for a mute function actually works worse than just disconnecting the hot alone. I also long came to the conclusion that the standard killswitch schematic that shorts the outpit with an n.o. switch simplt doesn't work.