Hello. First time post on this forum.
I’ve just got hold of a used UR44 (originally from Thomann in Germany). My setup is totally minimal. UR44 to iPad Mini Retina via CCK, so the only mains device connected is the UR44.
There is significant hum when using a condenser mic. This reduces significantly when any screen is touched such as the metal case or XLR. When using electric guitar humbucker really hums and single coil is just unbelievably bad. Hum is louder than signal. Again this almost entirely disappears when the UR44 case or jack screen is touched.
This can’t be a ground loop. There is no loop as the UR44 is the only item that’s powered.
I’m using a USB cable from a Focusrite 2i2 as the seller forgot to include the supplied cable. It does have a ferrite bead on it though.
Any clues? Could it be the PSU (original) which is continental via a UK adapter? I’ve tried turning the PSU around in the UK adapter and it makes no difference.
Surely this can’t be right?