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Old 30th November 2002, 07:18 PM   #31
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Default MISTAKE??

Infinite Baffle,

Hi,are you sure you did not make a mistake here??

Quote:
Two axial polypropylene caps, one diagram for each brand, the different curves taken from different samples- the author says they behave comparable; these firms may IMO sell the same product, who knows. Also compare these with the susequent diagrams
When reading the german text under the graphs it states for the right hand side one that in fact the Visaton cap behaves in an atypical manner compared to other MKP caps.

Have I missed something here?

Thx,
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Old 30th November 2002, 07:34 PM   #32
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John,

I hope i can cite further details soon.



"What I'm trying to get here is if there is any significance to the readings."

There should be. It is a relative measurement.
If the effect has a meaning at all.


"So, in terms of detected relative amplitude:
The vibration will be greater in amplitude if:
The dielectric is hard. (If soft it will absorb)."

No, that makes only different resonance frequences. If it is lossy, it is absorbed, but that is what you mean

"or
The winding of the capacitor is loose. (If tight the vibration is tensioned)."
Better coupling of the lossy material?results in better damping


"But in terms of absolute amplitude, we don't know the applied stress, so can't gauge the significance."

Right . However hard to say what is audible and what not

I think all capacitors were 4,7 or all 6,8F

See you

Philipp
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Old 30th November 2002, 07:44 PM   #33
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Default No mistake, not yet :-)

Frank,


"Hi,are you sure you did not make a mistake here??"

No, see below


you wrote:
" When reading the german text ... it states for the right hand side one that ... the Visaton cap behaves in an atypical manner "

No. It says : does behave -not substantially- different, read behaves similar


Philipp
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Old 30th November 2002, 07:48 PM   #34
dhaen is offline dhaen  Europe
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Philipp,

Thank you. This is interesting.

You see, if someone says "change to x capacitor, it sounds better", I cannot accept it.
But if someone says "x capacitor is better because of y", I'll buy it.



Cheers,
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Old 30th November 2002, 08:27 PM   #35
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John,

just for fun. Now if we accept the tighter/more stable the cap is the better its vibration behaviour, this may be an argument for small caps in parallel. Several small caps should allow for better winding stability....
help! gotta try it
Philipp
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Old 30th November 2002, 08:39 PM   #36
dhaen is offline dhaen  Europe
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Quote:
Several small caps should allow for better winding stability....
Philipp,
It certainly makes for lower inductance
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