[sdiy] OT: Turnrable pre - converting from moving coil to magnet

[John Mahoney]

I would *guess* that the input and feedback resistors on each channel 
need to be changed. MC carts have lower output than MM carts, so MC 
pres have more gain. I assume there's an impedance difference, too.

Hopefully an expert will chime in, here.

Maybe you should just buy a moving coil cartridge. :-)

John


At 04:06 PM 8/17/2009, Gil W. wrote:
>I wonder if any of you is into Hi-Fi system modifications...
>
>I just got a Famco "Nuance" preamp which sounds great with my Quad 
>405 amp. When I connect my turntanle (Sansui SR-5090 + Shure M44E 
>cart.) I hear only low frequency, as if there's a low pass on about 500hz.
>
>I checked the about the and found that the it was designed for 
>moving coil input (where there was a similar model which had moving 
>magnet input). So any suggestion how would I convert the input so it 
>supports moving magnet ? Is this as simple as replacing two 
>resistors ? Or is the entire design inherently different ?
>
>I know it works fine with moving coil input as this is what my 
>friend, who sold it to me, has in hos system, and it always sounded very good !
>
>Thanks !