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Calculating total capacitance

I would be very grateful if someone could provide me with the final cap pf rating when using the Rega P9(supplied rca cables-70pf?)and the Rega Exact 2 MM cartridge,the cap of which I have not been able to find.

I have a Steelhead phono which I would really like to dial in to the above combo.

So far I've done a lot of experimenting,and I am looking for some consensus.

So fellow Steelheads,if you have used your phono with a Rega set up like mine, what cap setting did you prefer or would you suggest?

At present I am using 55 db gain, 47K, and the default 150pf.

All opinions would be valued and appreciated.
lacee
lacee OP
811 posts
 
Thanks very much Atma Sphere,I really believe that what I am talking about is indeed the cartridge ringing.
When I up the cap value, the sound is more silent, almost digital quiet, but some of the "air" is missing.

I'll start to experiment with the resistance, and back down on the cap.
atmasphere's avatar
atmasphere
11,861 posts
 
Yes, I think you will find it easier to hit that 'sweet spot'. Please report back on your findings :)
lacee OP
811 posts
 
I tried backing off from 47 K and went to 200, but the sound just got very dull and volume level dropped.
I've set things at 150pf and so far so good.

I think I"ll take a break and just listen for awhile, get a good fix on this setting and then try some more settings.
I know my cartridge isn't High end, but it is a nice fit on my Rega 1000 arm, and I like the way it sounds,so in all likelyhood I am not utilizing the steelheads full potential.
atmasphere's avatar
atmasphere
11,861 posts
 
Lacee, 200 ohms would be **way** too low! I would start with something much higher, perhaps 20,000 ohms. Certainly you should not experience a drop in volume! If that occurs, you need a higher value. Note that this only applies to moving magnet cartridges.
lacee OP
811 posts
 
Yes it was with a MM, and the 200 is the selection just 1 click before 47K.
As I stated, I like the settings that I am using now,47K, 150pf, which is a default setting that seems to work for me.
Thanks for all the help.
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