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
I agree about power cords, my steelhead has a Shunyata Annaconda Helix into a Hydra 8 power conditioner on a 10 guage dedicated line, 30 amp breaker.

Also no cap is just too bright,still fidlling with cap settings.

One other thing I tried was running my Audio Aero Capitole cd player into the MC 2 input and activating the Line button.

I was expecting a compromised sound, but I think it's better than straight into my amp using the Capitole volume control.

The capacitance loading options on the Steelhead are almost like EQ controls.
If an LP sounds thin, bump up the pF, too fat, drop it down.

To some folks, and I counted myself as one, who don't like to fuss, this cap option is really a great feature.

There are some new favourite lps now that I can dial them in properly.

I never knew how tied down you are when you are at the mercy of fixed cap settings on phono stages.

The steelhead experience is something else.

I know I should replace the 6922(I have some Seimans gold pins lying around)but it sounds so good now I don't want to push my luck.
With higher output moving magnets it is possible to use a capacitor to load them, but IME you get a more open sound if you use a resistance instead, since the cap will have the effect of rolling off the highs.

The issue here is that the cartridge rings, which is a form of harmonic distortion. The cap rolls off the highs, and so absorbs a lot of the ringing distortion. But if you load with a resistance of the right value, the highs are not rolled off, but you are able to electrically damp the coils in the cartridge so they don't ring. Most of the moving magnets I have tried like higher values- 20,000 ohms or more (usually the stock value in the preamp is 47,000 ohms) but I have seen a few that loaded quite well around 8,000 ohms.

The advantage of this technique is you can get the loading to really work right without tradeoffs that often accompany the capacitive method.

You will need some sort of variable resistance that can be operated across the input connection of the phono preamp (I've used stereo volume controls from Radio Shack, wired as reostats). However since you have a certain amount of capacitance in the interconnect cable, the result is actually a combination of the two.
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.
Yes, I think you will find it easier to hit that 'sweet spot'. Please report back on your findings :)
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.