Power Station, FM3 and squealing

Hi…I’m using my Power Station 100 with an ENGL Special Edition Founders Edition which has 3 FX loops. Anyway I have a board running into the series loop, which operates fine, but I’ve recently added my FM3 to one of the other loops, for the options that that allows. When I’m not using the PS100 all works fine, but when I bring the PS100 into the equation and activate the loop with the FM3 in it gives off a very loud, piercing high-pitched squeal. Thoughts anyone? Thanks.

@hawkwind65 welcome to the community :tada:

This is a ground loop issue.

Check these videos out:

https://forum.fryette.com/t/what-is-mystery-squeal

Just wanted to let you know all is now well…thanks.

Dominic

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