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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 fromunda

fromunda OP
148 posts
 
thanks Atmasphere. Which setting would be 22,000 ohms? My manual lists for MM loading as such; 47kOhms/120pF
47kOhms/220pF
47kOhms/340pF
47kOhms/440pF
By the way what is pF?
fromunda OP
148 posts
 
Well, upon experimentation I have found the right load settings. For the Project tube box II, it would appear to be 100pF on one side and 220pF on the other, set in the mm mode. Sounds wonderful, thanks for all the tips guys!!
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