[quote name='Musky' timestamp='1349216283' post='1823590']
I know there's a known issue with switch mode supplies and Dave's pedals, in that they need to be plugged in to the effect before the power supply is switched on (IIRC). I'm not sure if that is a quirk of DHA's designs or whether it applies to other pedals as well. I seem to remember Dave saying it was a high pitched whistle, and could be cured by taking the above mentioned steps.
[/quote]
I did not know this. Thanks for that.