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Capacitors for RIAA Circuit
Capacitors for RIAA Circuit
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Old 5th September 2019, 10:34 PM   #11
jackinnj is offline jackinnj  United States
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Capacitors for RIAA Circuit
WIMA Polypropylene.

I haven't used MLCC but was much encouraged by the Linear Audio article in which they were reviewed favorably (by Scott's quadrature distortion measurement).
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Old 5th September 2019, 10:35 PM   #12
WntrMute2 is offline WntrMute2  United States
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Quote:
Originally Posted by rayma View Post
That's a maximum stress rating, and is not important here. They'll last indefinitely.
So, do they seem appropriate?
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Old 5th September 2019, 10:39 PM   #13
rayma is online now rayma  United States
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Quote:
Originally Posted by WntrMute2 View Post
So, do they seem appropriate?
Yes, they fit the bill well.
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Old 6th September 2019, 07:08 AM   #14
Zung is offline Zung  Switzerland
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Philips KS series 1% polystyrene.

Even though polystyrene/styroflex capacitors are no longer manufactured, the KS are still widely available as NOS on eBay, at reasonable costs. The only con I can see is the steel leads, but overall it's a very good compromise. In spite of what has been said, the dielectric does make a difference: stay away from polyester and ceramic.
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Old 6th September 2019, 07:25 AM   #15
K.A.B is offline K.A.B  Sweden
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I use a variety of different types on film capacitors but then I try them in different places before deciding where to sit.

But I always use the MLCC on the first capacitor because I feel that it does the least damage, but I have not tried them in other places

Anders
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Old 6th September 2019, 08:32 AM   #16
JamieMcC is offline JamieMcC  United Kingdom
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I've had very good results upgrading the RIAA stages in two different Phono amps to Russian surplus military teflon capacitors.

It was reasonably inexpensive as the uf values are low the improvment in resolution and spatiality was quiet noticable. As has been mentioned depending on brand they can take around 200hrs plus to burn before they open up and come on song. You can speed this up with a burn in rig or just hook up a music player to the inpurt and leave on shuffle.

Some pics

Russian candy

Click the image to open in full size.

Hand matched for closest values out of the 10

3 under 0.5% tolerance
3 1%-1.5%
2 2% - 2.5%

Two unused at 3.5% the capacitor tolerance rating was +/- 5%.

Click the image to open in full size.

Installed

Click the image to open in full size.

Last edited by JamieMcC; 6th September 2019 at 08:42 AM.
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Old 7th September 2019, 04:09 PM   #17
phase is offline phase  United States
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Quote:
Originally Posted by Zung View Post
Philips KS series 1% polystyrene.

Even though polystyrene/styroflex capacitors are no longer manufactured, the KS are still widely available as NOS on eBay, at reasonable costs. The only con I can see is the steel leads, but overall it's a very good compromise. In spite of what has been said, the dielectric does make a difference: stay away from polyester and ceramic.
Those, and the lesser known, but more recent EMZ branded replacements as well.
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Old 7th September 2019, 11:18 PM   #18
RajkoM is offline RajkoM  Bosnia and Herzegovina
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From my post No.8 ....

I appreciate the comments I received and I apologize a lot. Baypass capacitor for 318usec is ERO KP-1832 film/foil (not 1837 as I wrote in post).
Sorry, again.
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Old 7th September 2019, 11:23 PM   #19
blu_glo is offline blu_glo  England
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Polystyrene/"Styroflex" capacitors...of suitable voltage rating naturally...
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Old 7th September 2019, 11:27 PM   #20
rayma is online now rayma  United States
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Quote:
Originally Posted by blu_glo View Post
Polystyrene/"Styroflex" capacitors...of suitable voltage rating naturally...
Siemens Styroflex (either ps or pp) haven't been made since around 1980, far as I know.

Last edited by rayma; 7th September 2019 at 11:29 PM.
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