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Capacitors for RIAA Circuit
Capacitors for RIAA Circuit
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Old 7th September 2019, 11:32 PM   #21
blu_glo is offline blu_glo  England
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Quote:
Originally Posted by rayma View Post
Siemens Styroflex haven't been made since around 1980, far as I know.
They still seem to be available must be NOS then. A quick look on LCR website confirms that they at least are still making polystyrene, several variants indeed... Polystyrene - LCR Capacitors
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Old 7th September 2019, 11:48 PM   #22
rayma is offline rayma  United States
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Quote:
Originally Posted by blu_glo View Post
They still seem to be available must be NOS then. A quick look on LCR website confirms that they at least are still making polystyrene, several variants indeed... Polystyrene - LCR Capacitors
LCR is a different brand.
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Old 8th September 2019, 12:17 AM   #23
WntrMute2 is offline WntrMute2  United States
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Quote:
Originally Posted by rayma View Post
LCR is a different brand.
Explain please.
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Old 8th September 2019, 12:24 AM   #24
rayma is offline rayma  United States
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Quote:
Originally Posted by WntrMute2 View Post
Explain please.
They are two different companies.

Siemens company made Styroflex brand name capacitors, both pp and ps types until around 1980.
Photo here: 10x SIEMENS Styroflex KS Capacitors 3300pF -630V-1% (3.3nF) LOT of 10 PIECES | eBay

LCR Capacitors company now makes:
Photo: 500pF 160V 5% LCR AXIAL POLYSTYRENE CAPACITOR ad2R27 | eBay
EXFS-HR Polysterene
FSC Polysterene
FSC-EX Polysterene
FSR-VM-FSR-AX Polysterene
HS Polysterene
HSC Polysterene Coated
HSQ Polysterene
SUF710 Polysterene

Last edited by rayma; 8th September 2019 at 12:37 AM.
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Old 8th September 2019, 12:34 AM   #25
WntrMute2 is offline WntrMute2  United States
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Quote:
Originally Posted by rayma View Post
They are two different companies.

Siemens company made Styroflex brand name capacitors, both pp and ps types until around 1980.

LCR Capacitors company now makes:
EXFS-HR Polysterene
FSC Polysterene
FSC-EX Polysterene
FSR-VM-FSR-AX Polysterene
HS Polysterene
HSC Polysterene Coated
HSQ Polysterene
SUF710 Polysterene
Gotcha. Which of the above current LCR brand should I look at? The choice is staggering.
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Old 8th September 2019, 12:46 AM   #26
rayma is offline rayma  United States
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Quote:
Originally Posted by WntrMute2 View Post
Gotcha. Which of the above current LCR brand should I look at? The choice is staggering.
Count yourself lucky, there were slim pickings for quite a long time.
Some series are just packaging variants though. For your needed value, get the highest voltage rating available, usually 630VDC. For phono use get 1% for channel matching, otherwise 5% is ok.
Try both pp and ps types, since for the Siemens caps, the pp version was decidedly better.
These are cheap, so buy a bunch and keep them in business.
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Old 10th September 2019, 01:28 AM   #27
kodabmx is offline kodabmx  Canada
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Capacitors for RIAA Circuit
X2 MKP safety caps work well... Actually prefer them to Orange Drop and the like.

These are one example of a great price for the product.
MKP Safety Capacitor X2 275V 0.1uF/100nF/104K/0.22/0.47uf/220nf/330nf/224K/474K | eBay
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Old 10th September 2019, 08:21 AM   #28
K.A.B is offline K.A.B  Sweden
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Forgot to tell i never use audio caps after years of trying i find out most of the ordinary components are well up for audio and the price i have ability to try more caps to find right cap. One of best caps i choose to use is they how are made for pulse applications.
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Old 10th September 2019, 11:47 AM   #29
jackinnj is offline jackinnj  United States
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Capacitors for RIAA Circuit
Quote:
Originally Posted by rayma View Post
For phono use get 1% for channel matching, otherwise 5% is ok.
1% capacitors are usually about 10x the price of 5% film capacitors, and the range of values is much smaller.

I buy a lot of 10 WIMA Polypropylene and just measure them.

And in terms of an RIAA network, if you have none which are spot on you can always adjust the value of the resistors with parallel or series combinations.

Mouser carries XICON polystyrene.
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Old 10th September 2019, 08:39 PM   #30
Mark Tillotson is offline Mark Tillotson
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Paralleling several capacitors averages out tolerance variations, and allows select-on-test from a batch of cheap capacitors to be more economic (you don't need to discard the outliers, just match them to the opposite outliers).

You can do the same with series strings too, handy if only low voltage parts are available with reasonable tolerance.
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