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Phono Preamp Pt2: MC

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Graham Slee View Drop Down
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Pushing the boundaries

Joined: 11 Jan 2008
Location: South Yorkshire
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 22 Feb 2017 at 7:29am
The problem with the aforementioned designs is they easily pick-up interference - they do not have the immunity currently demanded by legislation.

It was noticed that on the introduction of RoHS compatible components that the incidence of interference increased. This might have been coincidental with an increased proliferation in radio frequency devices, and there are indications of relaxation of rado frequency legislation about that time.

However, I am convinced that the "removal of (alleged) harmful substances" (RoHS) had some unknown effect, because the sound quality also changed, leading me to rework virtually everything I had designed prior to that date. It did happen and I have the "scars" to prove it! The sound quality became quite dry and brittle, very much like tin-only soldered joints look and feel! And so I do believe the materials used have an influence on the sound, but I am at a loss to describe why.

But back on track, those circuits neither perform well interference wise or sonically today.

Not simple enough for Google-Bot to understand...
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