Today I only had time to run an earth to the pre-amp (no difference) and try to wrap the phono cables in an RFI shield (no difference). I'll try more as soon as I can.
Moving the phono stage away from the pre-amp (thanks Hevac1) is, relatively speaking, a fairly major change - so I'll do that last. This would probably anyway mean the Hum from the HP100 integrated phono has a different source to the separate phono (?).
Moving the phono stage away from the pre-amp (thanks Hevac1) is, relatively speaking, a fairly major change - so I'll do that last. This would probably anyway mean the Hum from the HP100 integrated phono has a different source to the separate phono (?).