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Phono cartridge self resonance
Phono cartridge self resonance
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Old 2nd February 2019, 05:48 PM   #81
Bonsai is online now Bonsai  Europe
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Hello LD - question for you

How does the cantilever affect the cart plot when its done in free air - i.e. not tracking anything and just suspended off the arm a la George's findings?
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Old 2nd February 2019, 08:27 PM   #82
luckythedog is offline luckythedog  United Kingdom
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Originally Posted by Bonsai View Post
Hello LD - question for you

How does the cantilever affect the cart plot when its done in free air - i.e. not tracking anything and just suspended off the arm a la George's findings?
A guess but not much if at all, I'd think.


LD
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Old 7th February 2019, 05:45 PM   #83
Jakob2 is offline Jakob2  Germany
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Originally Posted by luckythedog View Post
I think that, for all the wrong reasons, cartridges with low effective tip mass don't have audioband resonances.

Tip mass was worked backwards from observation of the 'top resonance' assuming a certain vinyl spring constant, which value I've lost and can't find again. Now whether that is right or wrong I suppose is a moot point: what matters is that the resonance is clear of the audioband. Tip mass is a restatement of that.

LD
Kerstens covered this topic (or at least some of it) in his article from 1956/57:

Kerstens, J. B. S. M. MECHANICAL PHENOMENA IN GRAMOPHONE PICK-UPS AT HIGH AUDIO FREQUENCIES, Philips Technical Review, Vol.18, 1956/57, No.3

Afair Anderson (from Shure) did a more analytically based calculation of the tip mass (or more precisely the equivalent tip mass) in an Audio mag article, but ive to look for it.
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Old 7th February 2019, 09:46 PM   #84
billshurv is offline billshurv  United Kingdom
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Phono cartridge self resonance
Interesting article thank you Jakob (found here http://www.extra.research.philips.co...956_57-089.pdf ) Ah the days when 10g was a low VTF.
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Old 8th February 2019, 08:42 PM   #85
gpapag is offline gpapag  Greece
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Phono cartridge self resonance
Thanks Jacob.
Bill, 5 grams is not that far away

George
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Old 8th February 2019, 08:59 PM   #86
billshurv is offline billshurv  United Kingdom
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Phono cartridge self resonance
George: true, you hooked it up yet?
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Old 8th February 2019, 09:42 PM   #87
gpapag is offline gpapag  Greece
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Phono cartridge self resonance
No. The plan is to do this after the testing.
Or is it the wrong plan?

George
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Old 8th February 2019, 10:47 PM   #88
billshurv is offline billshurv  United Kingdom
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Phono cartridge self resonance
I would listen then test. But I've somehow been doing neither on a lot of my ideas so don't believe a word I say
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Old 11th February 2019, 10:07 AM   #89
Jakob2 is offline Jakob2  Germany
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Bastiaans also published a very informative/thorough article about it:

Bastiaans,C.R. Factors Affecting the Stylus/Groove Relationship in Phonograph Playback Systems, JAES, October 1967,Volume 15, Number 4, 389

The before mentioned article from Anderson about the equivalent tip mass:

Anderson, Roger. Equivalent Mass - Fact or Fiction?, Audio, March 1973, Vol. 62, No.3 , 60

If someone needs help to get a copy, drop me a note.
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