Neumann U67 Clone : D-U67 Tube Microphone Build Thread.

[youngshu]

Alright I have replaced the entire big transformer and all of the caps in the power supply and I am still having a 120hz hum its faint and I honestly could work with it and no one but us engineers would notice but I want it to be perfect.

Can someone point me to where I should look next? Otherwise this mic sounds amazing with the beeskneez capsule and ami t67.

also i have tried it on multiple outlets multiple interfaces in multiple rooms and am getting the same 120hz hum

 

[Khron]

also i have tried it on multiple outlets multiple interfaces in multiple rooms and am getting the same 120hz hum

Try disconnecting the output 3-pin XLR's pin 1 from ground/earth, in the power supply.