Arcam Alpha 8 hum and other issues

[Uncertain]

I'm wondering if there is a 0V connection/track on the humming channel that is broken on the PCB. Try getting a piece of wire and put one end on the outer of the phono socket of the humming channel and the other end on the screw on the rear panel that the mains earth is connected to. Also try touching it to the other channel's phono socket outer.

Thanks

I've tried this in the past with no benefit I'm afraid. Arcam also suggested looking for breaks on the PCB. I've studied it in detail with an illuminated magnifier but not managed to find anything.

As far as I could tell there was no evidence that the amplifier has ever been worked on before I got.

Countless hours have gone into this in the past to no avail. I keep thinking I must be missing the blindingly obvious!

 

[richie00boy]

Very strange. What happens if you connect a 1k resistor across the noisy input socket?