Cartridge rubber decomposed: Useless? - Page 2 - diyAudio
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Old 16th February 2006, 09:52 PM   #11
pixpop is offline pixpop  United States
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Ah OK, now I've found some info about it.

I think on my cart, some of it has dried out, so it looks like decomposed rubber, but it seems like way too much rubber for there to be in a cartridge. And the bulk of it is.. black goo.

So, I won't trash it just yet. I'll try to clean it up a bit, and put it back together, see how it sounds. Maybe I'll buy a new stylus first, since this one is so old.
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Old 16th February 2006, 10:50 PM   #12
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Quote:
Hi, the black gunge is a mechanical fixant/damper its not the damper and its not Ferro Fluidy stuff, and rumour has it Grados never sound quite the same after the stylus has been removed and then re-fitted.
I mentioned ferro-fluid not because I thought Grado used it, but rather that it performed a similiar function that the fluid provides for tweetwers...dampens resonance...I believe we refered to it as monkey dung

I never noticed a reduction in performance after stylus replacement.
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Old 17th February 2006, 05:45 PM   #13
pixpop is offline pixpop  United States
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Just got a reply from Grado:


Quote:
DO NOT remove or attempt to clean out any of the black putty.
So, I guess we now have an official name for it. It's 'putty', not simply 'goo'.

I was getting to like the idea of 'goo'. Had a kind of mystery to it.
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Old 24th February 2006, 04:57 PM   #14
kevinkr is offline kevinkr  United States
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A new grado of comparable quality probably isn't going to cost much more than the replacement stylus. I have an ancient 8MR on an SME3009 II arm and I love it. In the past I have had the Monster Alpha, Sumiko Blue Point, Audio Technica (model forgotten) on a different arm/TT. (Audio Craftsman arm)

Why are you avoiding MC types, there are several HO models that sound quite good. I would recommend the Blue Point or one of its "improved" variants if you have a moderate to high mass arm otherwise stick with a somewhat higher compliance MM type.
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Old 24th February 2006, 05:03 PM   #15
pixpop is offline pixpop  United States
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Quote:
Why are you avoiding MC types, there are several HO models that sound quite good. I would recommend the Blue Point or one of its "improved" variants if you have a moderate to high mass arm otherwise stick with a somewhat higher compliance MM type.
I wanted to avoid MC for two reasons:

1. I thought the output was too low to drive an MM phono stage.
2. I thought they would tend to be much more expensive.

My phono stage is a Pearl, by the way, and my arm is a Rega RB250. The arm is currently stock, though I am thinking of doing the OL upgrades. Just not sure whether it's worth it.
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Old 25th February 2006, 06:04 PM   #16
kevinkr is offline kevinkr  United States
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The Sumiko bluepoint has very high output, in the same range typical for most moving magnets and ought to be a good match for the rb-250 arm which has moderately high mass. The BP tracks around 2 grams..
It's not the cheapest cartridge out there, but it is relatively inexpensive compared to high end mm types.
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