A thread which has been going on for a few days now deserves some added points. The original question was whether some caps advertised for sale were suitable for high voltage power supply duty in amp
? However, comparing a ripple-current rating for 105 deg C with a ripple current rating for 85 degrees C is hardly valid. My guess is that 105 deg C capacitors are going to last longer in a typical
I think John's point is that higher max. operating temperature rating seems to automatically imply some other performance enhancements over an 85 C rated cap, and I can't see that it does. Choosing t
? As I understand it, the lifespan of an electrolytic capacitor approx. doubles for each ten degrees C below its rated operating temp. -- provided that the temp. stays above the minimum allowable. -
Phil, I think John said the opposite (at least how I read it). That is, the 105C caps have less performance than the 85C caps. That would only make sense. Something always has to give when you impro
Message text written by Rich Measures doubles for each ten degrees C below its rated operating temp. -- provided that the temp. stays above the minimum allowable.< "Reducing the element temperature g
Excellent. Now we know for sure. Thank you John. -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: o
No. We see it the same way Jon. John F was saying that 105 C caps provide less performance and I agree. The "red herring " comes from the frequent recommendation to "buy the 105 C caps", implying tha
I have to agree with Rich on this one ! I can not speak for Nichicon but the life and derating curves for the CDE 380 85c and 381 105c series show a much longer expected life span when both are run
Explain why? Instead of rhetoric please use documented spec sheets for instance. Something always has to give when you improve a OH ??? I've got people asking me all the time for specs that are Only
On Thu, 04 Mar 1999 19:00:42 "Phil T. (VE3OZZ)" <phil@vaxxine.com> writes: ' A simple catalog sheet fails to tell the story. You need the full spec sheet which CDE at least is very detailed. I dont k
Hmm? Not necessarily. Take for instance a customer who wants a VCO designed with 0 dBm output, 5mA of current draw and -110 dBc/Hz phase noise at 10 KHz. Frequency range is 54 MHz wide and tuning an
identical. ? amen, Carl. I have replaced plenty of 85 deg C rated electrolytics. I have replaced no 105 deg C rated electrolytics. ? Agreed. Anything over 250uA of leakage at the rated V is suspect.
How did we drift from a PS to whatever you sell Jon? Please stick to the subject at least which for the moment is the evolution and performance of electrolytic capacitors. Tnx Carl KM1H All the rest
It's a bit like the old automobile industry saying: "Cheaper, faster, safer - pick any TWO." Getting back to capacitors, remember that the 85C or 105C ratings are external temperature, but what deter
HI Rich - from Nichicon catalog for the GQ series, the leakage current for a 470uF @ 450V should be less than 1380uA to remain in spec. Probably a worst case but over 1mA still seems a bit high. And
Carl, all I was doing was showing EXAMPLES of how sometimes specs have to give against each other. That's all. Just was using those to back up my point that many times technology and physical limits
On Sat, 6 Mar 1999 20:00:31 +0200 "John Fielding" <johnf@futurenet.co.za> writes: Go on-line and see for yourself. There is simply too much data to belabor the reflector much longer. 73 Carl KM1H To:
I measure it at room temperature. beats me To: <amps@contesting.com> that Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Subm
Gee Carl - if I knew where to find the CD web site I would do that. Anyway if you believe the topic is exhausted I will stop trying to help the others!! John ZS5JF -- To: <amps@contesting.com> To: <a