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Old 1st July 2003, 03:57 PM   #11
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a cap across the switch contacts also helps...I use .01uf 250vac ceramic

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Old 1st July 2003, 04:12 PM   #12
fedde is offline fedde  Netherlands
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Or make mute switches for the speakers. The original GC has them too. I also found that an oscillation causes turn-off transients.

http://www.fedde.nu, gainclone and non-oversampling DAC audio projects and kits...
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Old 2nd July 2003, 02:40 AM   #13
ashwin is offline ashwin  India
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Originally posted by JOE DIRT®
a cap across the switch contacts also helps...I use .01uf 250vac ceramic

Yes, that's what finally worked for me. I tried a spice sim, and I found that a resistor in series with the cap (say 470n in series with 330ohm) brings down the spike drastically compared with just the cap. But in my actual amp the cap alone worked just fine.

Now I need to rig up a good EMI filter...
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