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Cartridge loading capacitance setting for MMC3 pickup

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DS21
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DS21 Posted: Fri, Jun 28 2013 4:37 AM

I have a very recently resurrected RX-2 with MMC3 pickup. It feeds into my system via a Rane PS1 phono preamp. The PS1 has three options for cartridge loading: 100pf, 200pf, and 450pf. 

I see three conflicting recommendations for setting cartridge loading. Benny Amina, the gentleman who repaired my RX-2, told me to keep it to the minimum. According to  Soundsmith recommends 100pf. According to Vinyl Engine's database, ~400pf.

More importantly, perhaps, what should I listen for to determine the right setting? Is it a level difference, a spectral balance issue, phasing, or something else entirely.

Rich
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Rich replied on Fri, Jun 28 2013 3:32 PM

Either I'm missing something, or Benny and Peter recommend the same setting.  They would both know.

Benny has done at least 10 repairs for me, and I recommend him all the time.  I hope you had a good experience with him.

I have 3 RX2 decks and have never had a problem with one.  What happened to yours?


chartz
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chartz replied on Sat, Jun 29 2013 11:16 AM

B&O used 150 pF!

Jacques

DS21
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DS21 replied on Sat, Jul 6 2013 12:54 AM

Nothing at all wrong with Benny's repair. Benny changed my belt and replaced a cracked gear in the cueing mechanism for what I believe to be a reasonable price. 

My question is more of a "now that it's home and working" issue.

I don't remember what I had set my previous phono preamp's cartridge trim to (an old HK PM655 integrated that I was only using as a phono preamp) to, but previously I had also used the MMC5 rather than the MMC3 currently installed.

What sonic changes should I expect with different cartridge loadings? I haven't had much time to experiment as of yet.

ouverture
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ouverture replied on Sat, Aug 17 2013 11:53 PM
all the MMC carts like to see 100Kohms on load impedance along with no more than 150pf on total capacitance.

so use the 100pf setting on your pre amp, using 200pf setting the sound will be just be harsher and brighter, whatever you do - please don't use 400pf setting

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