Quiet buzz on 303 left channel but only when powered by 33

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07-Nov-2018 04:25 PM

beadlesabout

beadlesabout

Posts: 13

Hi. I have a 303 and 33 serviced by quad. If I power the 303 from the 33 I get a quiet, insect like buzz from the left channel which is constant and unaffected by volume. 

If I power the 303 on its own but leave everything else in the setup the same I get no buzz. 

I always get the buzz in the left channel when powered by the 33, even with nothing plugged into the 33. 

Could anyone help me to troubleshoot it? 

Thanks. 

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