I have a Leben CS300XS. It's tube push pull. There is a slight (but annoying) hum in the right channel with some high impedance headphones (sensitivity doesn't seem to matter). Leben tells me it is because the input trafo is too close the output trafo. This is only a problem with some headphones, and probably not with speakers.
The input trafo is on the right.
So I am thinking - how to fix this?
My thought is maybea steel cage would shield the magnetic field from the input trafo? Is that a good iedea? What should I use- how thick must the steel be to have an effect?
Edited by ardilla - 10/23/13 at 6:05am