My Perreaux SA2 sounds fine playing cd's but is noisy/slight hum when playing vinyl. It is noisy on MM and REALLY annoying swithching to MC.
Could it be that replacing certain caps/resistors/diodes, ect in the phono section only,.... solve this problem? Is this something a professional shop would charge big $$$ to do? I know how to solder and the difference between a cap and other parts. Help please???
Could it be that replacing certain caps/resistors/diodes, ect in the phono section only,.... solve this problem? Is this something a professional shop would charge big $$$ to do? I know how to solder and the difference between a cap and other parts. Help please???
Forgot to mention earlier that the hum/hiss is MUCH louder on the right channel than the left...if that even matters.
The local shops charge $60-$70 just for an estimate. It's tempting to just attempt the repair on my own. Do I need a schematic or should I just make a list of the various phono section parts and remove replace them all?
Hi,
That one channel is much worse does matter.
That can be fixed. The MC input is a joke, its
just MM with more gain and can't be fixed, MC
noise performance is very poor, MM is decent.
The CD input is also a joke, its no different
to the other line inputs at 110mV. The noise
difference between CD and MM is inevitable.
rgds, sreten.
That one channel is much worse does matter.
That can be fixed. The MC input is a joke, its
just MM with more gain and can't be fixed, MC
noise performance is very poor, MM is decent.
The CD input is also a joke, its no different
to the other line inputs at 110mV. The noise
difference between CD and MM is inevitable.
rgds, sreten.
Is there anyway to know which caps are NOT in the signal path.... so that I don't have to change those?
Hi,
I wouldn't replace anything. I'd swap semiconductors between
channels in the phono stage to see if the right channel problem
moves to the left, a schematic would be a great help.
Changing passive parts won't fix the intrinsic noise issue.
rgds, sreten.
I wouldn't replace anything. I'd swap semiconductors between
channels in the phono stage to see if the right channel problem
moves to the left, a schematic would be a great help.
Changing passive parts won't fix the intrinsic noise issue.
rgds, sreten.
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Hi,
Have you anything useful to say other than
pure contradiction and also being wrong ?
rgds, sreten.
Last edited:
Hi,
No, everything you have said is pointless opinion,
contradictory and totally useless observations.
And wrong in all respects. Meaningless clutter.
rgds, sreten.
No one has stopped to ask how old this unit is, whether the OP is absolutely certain there is no problem with the external wiring to his turntable, and whether or not the cartridges used meet the recommended output levels for use with this phono stage..
Some history would helpful, is this a new acquisition or is it something you have had for a while that is now showing evidence of age?
Another thing to consider is soldering skills and that PCB. Can the OP get the semiconductors out without destroying them and the board? A schematic would be most helpful.
A simple check would be to swap the left and right phono cables and make sure that the noise problem does not move from one channel to the other.
Some history would helpful, is this a new acquisition or is it something you have had for a while that is now showing evidence of age?
Another thing to consider is soldering skills and that PCB. Can the OP get the semiconductors out without destroying them and the board? A schematic would be most helpful.
A simple check would be to swap the left and right phono cables and make sure that the noise problem does not move from one channel to the other.
Hi,
First thing obviously to ascertain is the difference between the channels.
I assumed all channel swapping shenanigans have already been tried.
rgds, sreten.
First thing obviously to ascertain is the difference between the channels.
I assumed all channel swapping shenanigans have already been tried.
rgds, sreten.
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