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Matching stepup to phono stage

If I use a moving coil stepup transformer (Quicksilver) before my phono stage (CJ Premier 15) do I keep the the CJ Premier 15 loading at 47K or do I change the CJ loading to the recommended loading of the catridge. The input impedance of the Stepup is 250 ohms.

Thanks,
Rich
rhbblb1

Showing 2 responses by rhbblb1

rhbblb1 OP
10 posts
 
"The impedance presented to your cartridge will be the combination of the 250 ohms of the step-up and the 47Kohms of your phono stage."

OK, but how do they interact. How can the "final" impedance be calculated?
rhbblb1 OP
10 posts
 
Herman,
I kind of figured out what you are saying. The Stepup has 23db of gain. I believe that would calculate into a turns ratio of 13.7. Thus, 13.7 X 13.7 = 188. 47,000 divided by (13.7 X 13.7) = 250. Is this correct?

Thanks,
Rich
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