I have a KSL without RIAA but with the hum. I had to put the PSU in an external box in order to get rid of it.
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That is a pretty extreme fix....fortunately my KSL is quiet. Phono starts to get noisy above 2 oclock increasing to full tilt with no music playing. I listen between 10 and 1 now that the phono board is fixed. They may exist but I haven't owned a phono stage that was dead quiet when turned that high.
Here are some pics, best I can do.
J309 jfets ID'd.
http://i417.photobucket.com/albums/pp260/scompracer/Krell KSL/close_1b.jpg
Thank you for the nice photos. Strange choice of J-Fets in the input stage.
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