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Phono cartridge self resonance
Phono cartridge self resonance
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Old 1st February 2019, 12:26 PM   #61
billshurv is offline billshurv  United Kingdom
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Phono cartridge self resonance
I'm not sure anyone knows*! We never got many hints of inband cantilever resonances when we went looking for them other than the most Clydesdale** of cantilevers. As LD says so many loose ends to tug. I think we are closer now than before though.



*well people did know, they just never told and the knowledge is dying with them.
**A popular breed of heavy horse. weighs 800-1000kg
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Old 1st February 2019, 04:56 PM   #62
luckythedog is offline luckythedog  United Kingdom
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Quote:
Originally Posted by billshurv View Post
We never got many hints of inband cantilever resonances when we went looking for them
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
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Old 1st February 2019, 04:58 PM   #63
ThomasA is offline ThomasA  Sweden
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The super OM I have is very flat; the Shure V15VxMR is not (while the V15V-MR was flat, split pole pins). Having the SAS stylus gives a different response on the V15Vx
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Old 1st February 2019, 06:07 PM   #64
Dilbert is offline Dilbert  Canada
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FYI

http://patft.uspto.gov/netacgi/nph-P...s2=Meitner&OS=
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Old 1st February 2019, 06:59 PM   #65
gpapag is offline gpapag  Greece
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Phono cartridge self resonance
Thank you Dilbert.
Has the Canadian assignee “Amber electro design” put in the market any such preamplifier since 1985. ?
I looked and didn't find any reference.

George
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Old 1st February 2019, 07:06 PM   #66
billshurv is offline billshurv  United Kingdom
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Phono cartridge self resonance
A Good find. Ed Meitner. Not suprised really. Nothing in his current lineup has that, but he's been a digital guy for years (decades?). I'll try and find an interview he did and see if he mentions it there.
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Old 1st February 2019, 07:09 PM   #67
Dilbert is offline Dilbert  Canada
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Not ever produced or sold by Amber, but Ed Meitner later moved to the now defunct Museatex, preamps were sold under under the Meitner name, I seem to remember.

Amber strictly made audio test gear.

Last edited by Dilbert; 1st February 2019 at 07:29 PM.
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Old 1st February 2019, 07:10 PM   #68
Dilbert is offline Dilbert  Canada
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FWIW, I have built a few of them over the years and continue to use two.
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Old 1st February 2019, 07:44 PM   #69
billshurv is offline billshurv  United Kingdom
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Phono cartridge self resonance
According to Meitner PA6i they sold a transimpedance MC module but not MM. I guess like most he realised it was too hard to setup for the average user.



Museatex Melior Phono Center says it's a trans amp but the setup instructions don't suggest that
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Old 1st February 2019, 08:06 PM   #70
Dilbert is offline Dilbert  Canada
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Yes, R Comp needs to be selected based on the specific MM cartridge inductance and DCR. Not consumer friendly, for sure. I think the PA6 did offer it initially for MM cartridges, but it was likely dropped.

It had plug in phono card options.

Last edited by Dilbert; 1st February 2019 at 08:28 PM.
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