Hi Douglas,
Thanks for your reply. Yes you may be right about putting it between the guitar and the amp, but there is actually a designated 'To Power Amp' output located on the back of the pedal which is designed to be plugged into the 'Return' output on the amp. It's one of the unique features of the pedal which is supposed to in theory turn your amp into a Diezel VH4, it just isn't working well at all on my katana.