Hello,

Thanks for the advice.

I’m not saying that it has cured the problem but the electricity in my local area has been off all day today so I have only just been able to power up my gear and I was unable to hear the problem. I’m a bit tired right now so I’ll try again later but if it re-occurs, I’ll definitely try using the Grand Canyon power supply but as with any configuration, there is a shortage of power outlets.

Also, I’m planning to completely re-assemble the pedalboard again in the next few days to fix the base at a different angle, so no doubt there will be a new ‘feature’ or two for me to address.

I tried using a separate power supply on the Grand Canyon as suggested but it didn’t make any difference so without having to root through all my boxes to find another power supply, I tried connect that one to the Super Pulsar and the Grand Canyon to the multi-output supply I have. That caused the noise to change but didn’t get rid of it so I then found another power supply and used that so that both the Super Pulsar and the Grand Canyon were on separate power supplies along with the PolyPhase on its 24v supply. Again, the noise changed but didn’t go away.

Eventually, after a lot of cable disconnecting, I found that the problem seemed to be caused by the two inputs being adjacent to each other on the mixer; I swapped the inputs around so that there were two channels between the two pairs and the noise seems to have gone away even with the Grand Canyon and Super Pulsar connected to the multi-output supply – which is a relief because there just aren’t enough mains sockets!