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Rotary switch signal bleed, normal?

post #1 of 3
8/18/11 at 9:36am
Thread Starter 

I used an Electroswitch 3 pole rotary switch as source selector in an amp I built. The ground is switched along with the L and R channel.

 

Let's say I have source A connected to position 1, and I have noting connected at position 2. When the switch is at position 2, at very high volume level (near max level), I could hear the music that is playing at source A along with some whirring noise. The volume is soft, but enough to hear what is being played at source A with AKG K501 (a pretty inefficient headphone). I imagine with other more sensitive headphones it will be much much worse.

 

I have a lot of cable connected and jammed together at the switch, is this the cause? The cables are all shielded though. Or is it the rotary switch?

 

Thanks in advance. smily_headphones1.gif

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post #2 of 3
8/18/11 at 9:53am
Switch. Although alot of rotaries have this problem.
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post #3 of 3
8/20/11 at 12:15pm
Thread Starter 

Thanks. smily_headphones1.gif

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