Originally Posted by AndrewFischer /img/forum/go_quote.gif What size? A 5µF film/foil cap is going to be large and maybe expensive. Metalized film, like the Solen isn't as big.
Angela sells something very similar to the Solens at Parts Express.
I have 5uf 100v *shielded (shielding removable) polycarbonates that are only 23*21*15mm. interested parties are welcome to buy a couple off me, but i only have something like 30 of them. they are NOS from god knows when. They are Electrocube 5MC29.
I also have 4.7uf 63v metalized polyesters that are wafer-thin and, well, sound better than electrolytics in speaker crossovers.
Actually, I prefer Dsavitsk's, hands down (http://www.ecp.cc/cap-notes.html). The statment in the reference above,"What sounds the best? That's up to you." and the fact that no brand names/models are mentioned, renders it pretty much useless except as an academic exercise.
In Dsavitsk's case, we have to accept his own opinions, but at least that's a starting point. Buy a single brand and a type that he tested, then you have a baseline with which to compare all the other ones he did, too.
Originally Posted by tomb /img/forum/go_quote.gif Actually, I prefer Dsavitsk's, hands down (http://www.ecp.cc/cap-notes.html). The statment in the reference above,"What sounds the best? That's up to you." and the fact that no brand names/models are mentioned, renders it pretty much useless except as an academic exercise.
Me on the other hand, I refuse to accept the results of any listening test performend in a manner which can be discussed on this forum
For an input cap, yes you can use 5.1µF instead of 5.0µF.
If this is a CMOY with all other values unchanged, 5µF is overkill. Try a .47µF or even .33µF polypropylene film cap. One choice that won't break the bank is a SBE 716P or 715P. Mouser carries the 715Ps. You can get the 716Ps from Angela or Tubesandmore.com.
If you are trying to keep the amp small, try a metalized polypropylene box cap like a .33µF Wima MKP2.
Honestly, I think you should keep things in context when going audiophile on components. Pick a polyester cheapie for your cmoy; the entire amp design is likely to have more of an effect on the sound than a single component, and I think you shouldn't even bother with much more than the opamp for the cmoy.
Either way, 5uF is overkill for a coupling cap. Which CMOY design/tutorial/guide says you need a 5uF cap?
Sorry, I know I'm probably implying that you should empty out your wallet even more, but I'm just saving you resources for down the road =D I went a bit overboard with the caps/resistors/etc on one of my first CMOYs, and I haven't touched it at all after building other amps.
Originally Posted by nikongod /img/forum/go_quote.gif if you are making a "mahagony cmoy" then they areguably should be a set of solens, whcih can be gotten fairly cheaply from a few sources.
slightly smaller (there is a 4.7uf auricap that only costs a bit more, and only sounds a milion times better) will work in that design, you can arguably go as low as 1uf, but 2uf is a better goal.
exact, I replace caps of my original RA-1 by a Auricaps 4.7, at least psychologically the sound it improved