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B1 Buffer Preamp
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Old 12th April 2014, 12:29 AM   #3971
kingnubian is offline kingnubian  Canada
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Originally Posted by 6c4c View Post
In my opinion, it is better to use Wima (or other brand) polypropylene (MKP) caps instead this average cheap russian polyester (mylar) in signal path, but they are very robust in common apps.
Could you elaborate your opinion?
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Old 12th April 2014, 03:12 AM   #3972
Nelson Pass is offline Nelson Pass  United States
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There seems to be a general consensus that polypropylene is better sounding
(more neutral) than polyester.

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Old 12th April 2014, 07:53 AM   #3973
6c4c is offline 6c4c  Russian Federation
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Originally Posted by kingnubian View Post
Could you elaborate your opinion?



Mr. Pass said fine, yes - more natural. And if you want extra "sound clearance", use silver mica russian ССГ caps, but they are 0,1 uF maximum. The material does matter.
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Old 12th April 2014, 08:55 AM   #3974
peranders is offline peranders  Sweden
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Why using so physically big caps with low resonance frequency?
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Old 13th April 2014, 01:55 AM   #3975
kingnubian is offline kingnubian  Canada
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Just when I thought I all my parts selected I get thrown a curve... Lol...

Now I'm looking at these and thier 1uf versions. Also the MKP10's.

MKP4F051007F00JYSD WIMA | Mouser

Last edited by kingnubian; 13th April 2014 at 01:58 AM.
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Old 13th April 2014, 09:11 AM   #3976
AndrewT is offline AndrewT  Scotland
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Mouser says
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capacitance 10pF
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Old 13th April 2014, 10:30 AM   #3977
viswesh is offline viswesh
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hello everyone.
i am building a preamplifier , i need your help..
which capacitors are best for signal path/coupling? and for power supply?
can i use panasonic M series cap's for signal path or it is better to use mkp cap's?

thank you.
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Old 13th April 2014, 03:42 PM   #3978
AndrewT is offline AndrewT  Scotland
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Polypropylene seems to be near best for signal coupling.
The caps impedance must be low enough at the lowest frequencies you are coupling to be in effect inaudible.

Electrolytic seems to be good enough for PSU.
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Old 13th April 2014, 03:53 PM   #3979
kingnubian is offline kingnubian  Canada
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Quote:
Originally Posted by AndrewT View Post
Mouser says
Sorry...corrected link below.

DCP4I051006GD2KYSD WIMA | Mouser

I am leaning twords the MKP10 though but can't find the 1uf varient of the MKP10 with the proper lead spacing for the B1 R0 pcb I have.
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Old 14th April 2014, 06:38 PM   #3980
kingnubian is offline kingnubian  Canada
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Due to the limited space on the B1 PCB for bigger sized caps, has anyone gone ahead and mounted the caps on a separate "daughter" board?? Any comments on this idea?
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