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cartridge loading

I am running a grado red with a project se II tube phono preamp. It is a mm cart that works on the tube box factory setting which I believe is 47kohm. I am getting some annoying hum and am wondering if any other settings on the tube box would be better. There are DIP switches that can be set for both mm or mc loading.
fromunda

Showing 2 responses by rauliruegas

rauliruegas
13,129 posts
 
Dear Fromunda: You have to try almost all those settings in your phono stage to achieve the best quality performance in your system.

MM/MI cartridges needs not only 47K ( some times different impedance value. ) but a capacitance load ( those pF you are asking for. ), these kind of cartridges are sensitive to capacitance loading.

Rgeards and enjoy the music,
Raul.
rauliruegas
13,129 posts
 
Dear fromunda: Capacitance on MM/MI cartridges always makes a " difference " and when you find out the right value then you " know it ".

Good you are " there ".

Regards and enjoy the music,
Raul.
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