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In Reply to: RE: Thanks very much posted by Lew on August 17, 2016 at 08:33:06
Lev wrote: "....For use in audio, the C0G would be limited by the fact that they are not made in values higher than 0.1uF (100nF). If you've designed your RIAA such that you only need capacitance up to 0.1uF, you're good to go."You can, if you need, connect them in parallel . . . none of my RIAA components exceed 10 nF though.
Edits: 08/17/16Follow Ups:
After posting, I realized that many, if not most, RIAA circuits DO use capacitors in the range below 0.1uF, which is 10,000pF. I own four phono stages, and to my knowledge they all make do with C values less than 10KpF. I have been using the Russian silver mica SSG capacitors in phono, whenever possible. They are about as transparent as any I have ever heard. I'd be interested to try C0Gs, if just for my own edification, because sometimes the Russian SSGs just don't physically fit on PCBs. Have you ever compared C0G to SSG?
Yes and no(but just ordinary Silver Micas, not the SSG ones*.), and I find the COGs is at least as good, both in RIAA and as input match for the cartridge.*Edit: My fault.
Edits: 08/17/16 08/17/16 08/18/16
Way better than the typical "silver mica" capacitors of current vintage, both in build and in appearance. The only problem is their physical size (big) and the fact that the outer casing is metallic, which means it cannot be allowed to touch other circuit elements. In fact, so far the SSGs are the only Russian capacitors I have tried that really do live up to their advance billing, and then some. I did not find the Russian teflon caps to be on par with teflon caps made by REL or sold under the VCap label, for one example. When it comes to teflon, there's no free lunch.
They come with little tags for soldering to. I recommend removing those tags (they easily fall off if you heat them with a solder gun) and soldering direct to the nubbin-like contacts.
Please, try a bunch of Hitano COGs, they are dirt cheap and can be matched to the last pF if you buy several of each value.The Hitano can easily be purchased up to 330pF each. As I said, I prefer them over ordinary Silver Micas.
If nothing else, size matters. Plus, the SSGs are not made in the really low pF range of values.
The Vishay ERO KP1830, specs say they are tin foil and PP, are so far the ones to beat. IMHO the ordinary micas are likely not in the same league. Hitano C0G caps don't seem available in the USA or on Ebay for the most part. The best C0G's are supposed to be the BME ones. The Kemet 300's are easy to get and are BME C0G's. T456
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