Bob Olhsson wrote:

In article , Fletcher
wrote:

This is true in most cases...

My understanding is that the problems arise with mikes having a
grounded center tap on their output transformer. Other problems are
hot-plugging mikes with the power on or using a microphone patch bay
that has phantom power running through it.

Yup, it's the centre tap that screws it up for sure.

Hot-plugging prolly explained a few mic I/P failures on Studiomaster
desks prior to me - lol. A few diodes to the supply rails fix that.


Graham