I have a TwinQ channel strip from a friend where the right channel shows weird behaviour in the signal pathway. The signal has interruptions and when that happens the meter moves nervously up and down. But as far as i can tell the preamp does seems fine because there the meter shows no unsteady movement. I uploaded a sound sample to make things clearer.
It sounds like a helicopter noise..
I have some pictures here but i guess the sound sample will tell more..
It sounds like a helicopter noise..
I have some pictures here but i guess the sound sample will tell more..