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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
patrickamory
193 posts
 
Keep the CJ loading at 47K.

You need to choose the right step-up transformer to present the recommended loading of the cartridge AND simultaneously give you the correct amount of gain. 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.

Adding resistive loading to inductive loads, pace Bent Audio, is not recommended.

Patrick
soundwatts
221 posts
 
Patrick

Why are you not recommending Bent Audio.
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?
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