still got the hum? I note you have it awefully close to some newer equipment, one with a laser...older marantz I find are efficient amplifiers of stray environmental RFI noise...
also, check out the phono board...are there 2 22uF 'tants in there? get em out.
I think the 2270 benefits from the same phono mod as the 2230 and I have a twist on that even I found that works.
also, check out the phono board...are there 2 22uF 'tants in there? get em out.
I think the 2270 benefits from the same phono mod as the 2230 and I have a twist on that even I found that works.