Phono Transfer System Construction Information

Construction information for DIY projects, including the MS Mid Side Matrix, Elliptic Equalizer, Mastering Console, Phono Transfer System, Insert Switcher and the Dual Class-A Amplifier. You can post your baby pictures here.
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mediatechnology
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Re: Phono Transfer System Construction Information

Post by mediatechnology » Wed Mar 03, 2021 9:52 am

billshurv wrote:
Tue Mar 02, 2021 6:48 pm
That is certainly the theory. But as it makes no sense from an MC perspective and they use the same cantilevers as MM there must be something else going on. Note that in the paper I quoted the mechanical resonance was frigged to give the answer they wanted but since it then drove the design of an 'inverse resonance filter' to fix the output I think the point was somewhat missed. And he didn't do any tests with vinyl and a square wave test signal it was all theoretical.
Pardon my ignorance but wouldn't the differences in mass at the end of the cantilever and the several orders of magnitude less inductance of the generator differentiate the behavior of MM from MC?

They're similar in that both sound like crap with too low a termination one being a C and the other an R.
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JP.
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Re: Phono Transfer System Construction Information

Post by JP. » Wed Mar 03, 2021 10:19 am

mediatechnology wrote:
Wed Mar 03, 2021 9:45 am
JP. Is that last image a 150 pF or 0 pF load?
The header reads 150 but the .wav file has 0 pF in the path.
I'm guessing 0.

The distortion peak is bodacious.
Similar to what I heard with the '681 lightly loaded.
150pF. The file nomenclature I used at the time was additional capacitance added.

In case it wasn't notice, the distortion is at a difference scale than the FR.

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Re: Phono Transfer System Construction Information

Post by billshurv » Wed Mar 03, 2021 10:33 am

Agree the generator behaviour is very different but the moving mass is similar, if anything lower with MM despite what some people claim so the mechanical performance should be similar UNLESS the compliance is a major contributor. Certainly something to test.

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mediatechnology
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Re: Phono Transfer System Construction Information

Post by mediatechnology » Wed Mar 03, 2021 10:34 am

JP.: The test record is the only difference?

I did notice the left and right y-axis scale differences.
https://ka-electronics.com

“Diet, injections, and injunctions will combine, from a very early age, to produce the sort of character and the sort of beliefs that the authorities consider desirable, and any serious criticism of the powers that be will become psychologically impossible.” – The Impact of Science on Society (1953) by Bertrand Russell, p.50

Dr. Sherri Tenpenny Exposes 10 Deadly Dangers of Pzifer/Johnson & Johnson Covid-19 Vaccines: "This is a well-designed killing tool." https://waynekirkwood.com/content/Docto ... accine.mp4
Plandemic Series: "Pland3mic - Indoctornation" https://waynekirkwood.com/content/Pland ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://waynekirkwood.com/content/Plandemic.mp4

billshurv
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Re: Phono Transfer System Construction Information

Post by billshurv » Wed Mar 03, 2021 10:35 am

I had forgotten JP had an account here. So we have JR and JP posting next to each other and I'm already getting confused :D

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mediatechnology
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Re: Phono Transfer System Construction Information

Post by mediatechnology » Wed Mar 03, 2021 10:39 am

I'm still looking for some clarity about the difference in behavior between termination at the generator, typically by an active input and load R, and reflected termination that is connected at the secondary of a MC transformer.

One's incident the other reflected.
The reflected load has to "transverse the transformer."
My visualization of that is a click and I'm looking in the time domain.
https://ka-electronics.com

“Diet, injections, and injunctions will combine, from a very early age, to produce the sort of character and the sort of beliefs that the authorities consider desirable, and any serious criticism of the powers that be will become psychologically impossible.” – The Impact of Science on Society (1953) by Bertrand Russell, p.50

Dr. Sherri Tenpenny Exposes 10 Deadly Dangers of Pzifer/Johnson & Johnson Covid-19 Vaccines: "This is a well-designed killing tool." https://waynekirkwood.com/content/Docto ... accine.mp4
Plandemic Series: "Pland3mic - Indoctornation" https://waynekirkwood.com/content/Pland ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://waynekirkwood.com/content/Plandemic.mp4

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JP.
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Re: Phono Transfer System Construction Information

Post by JP. » Wed Mar 03, 2021 10:50 am

mediatechnology wrote:
Wed Mar 03, 2021 10:34 am
JP.: The test record is the only difference?

I did notice the left and right y-axis scale differences.
Yes. TRS-1007 vs. TRS-1005.

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