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#1
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Capacitors - recap 25volt solid state gear
What brand of caps (electrolytic and film) would use to recap some
older solid state preamps? I need to change out all the 30+ year old electrolytics (1 to 400 uf at 25v) , and I'd like to find a few good sounding film caps for the EQ section. I was just browsing through Digikey's catalog hoping to find the HFS series caps but no luck. |
#2
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Capacitors - recap 25volt solid state gear
Thanks for the reply Scott.
Most of the electrolytics are axial, but I'm starting to give up on the idea of finding decent axial replacements. I could make low profile radials work but they'd be a little more of a pain to install. Most of the film caps are in the range of 0.001 to 1.0 uf. What would be your top choice(s)? thanks On 1 Aug 2003 18:32:34 -0400, (Scott Dorsey) wrote: Do you need axials or radials? Some of the Panasonic films are okay but it depends on the values you need. --scott |
#3
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Capacitors - recap 25volt solid state gear
Stephen Sank wrote:
In my opinion, and I have done a whole lot of a/b testing, the Wima caps(and their identical mates from Rifa & Ero) are not much good for anything but power supply bypass &, sometimes, feedback EQ circuits. In the direct signal path, they add a definite haze to the top end, and just plain don't sound transparent. They're the first things I rip out & replace when I do upgrades on Moscode, Levinson & other high end home audio gear. Ya' know, it's pretty goddamn disgusting to open up a pair of $22,000 Cello(Levinson) monoblocks & find it full of the same antiquated & cheap(relatively speaking) Wima & etc. box poly caps that weren't even good enough for a $1000 Moscode amp in the '80's. Interesting. Which particular types are you talking about? "Poly" what? I could imagine some cheapskates using Wima metalized polyester film caps just because they LOOK like nice capacitors, but in a $22,000 amplifier they ought to be silver and teflon or some such nonsense. I'm a firm believer that better is, well, better, and I think if you take a look at the DF and DA on various WIMA caps you won't assume that polypropylene film & foil caps will sound anything like metallized polyester. Same goes for the Panasonic stuff from Digikey, if you don't need a pretty square box to impress audiphile customers with Mad Cash Disease. ulysses |
#4
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Capacitors - recap 25volt solid state gear
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#5
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Capacitors - recap 25volt solid state gear
That's why I use solid tantalum caps (when possible) in place of
standard electrolytics. They don't age like paper caps. That hasn't been my experience; I've taken some decidedly aged solid tantalums (tantala?) out of old Revoxes (Revoces?) Peace, Paul |
#6
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Capacitors - recap 25volt solid state gear
"Arny Krueger" wrote in message ...
"R. Foote" wrote in message om (Scott Dorsey) wrote in message ... And if you think this is bad, you should SEE what electrolytics are like. Though of course electrolytics also change value as they age and as the temperature changes, so they are a really bad idea in any circuit where values are critical. --scott Good point Scott That's why I use solid tantalum caps (when possible) in place of standard electrolytics. They don't age like paper caps. As long as you keep 'em adequately biased, no sweat! I wouldn't use ANY large caps in the signal path unless I had to (you know, preamps mixers etc) It would be better to block dc in the design stage with input offset biasing. |
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