B
bounce
New member
Hi. If you're like me, you bought a 12ay7 pre and got some nasty low frequency hum from it even out of the XLR balanced outputs into balanced gear. Here's a tip to try that fixed the issue for me if you are one of these folks.
Disconnect the shield (pin 1 wire) on the mic cable going out of your EH pre. Lifting the shield can sometimes cure these type of problems with certain gear. Some consoles (like our DDA-DMR12) like to have the shield lifted at the destination end anyway. I keep some short mic cables lying around with the shield (pin 1) lifted anyway just in case I need this type of interface. This cured my hum issue and the pre is very quiet now with plenty of gain for many things
Hope this proves useful to some folks.
Disconnect the shield (pin 1 wire) on the mic cable going out of your EH pre. Lifting the shield can sometimes cure these type of problems with certain gear. Some consoles (like our DDA-DMR12) like to have the shield lifted at the destination end anyway. I keep some short mic cables lying around with the shield (pin 1) lifted anyway just in case I need this type of interface. This cured my hum issue and the pre is very quiet now with plenty of gain for many things
Hope this proves useful to some folks.