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
----------
> From: km1h@juno.com
> To: amps@contesting.com
> Subject: Re: [AMPS] Ripple current ratings of high voltage caps.
To: <amps@contesting.com>
> Date: 07 March 1999 12:35
>
>
>
>
> On Sat, 6 Mar 1999 20:00:31 +0200 "John Fielding" <johnf@futurenet.co.za>
> writes:
> >
> >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 leakage current is temperature dependent
> >increasing as temperature
> >goes up. For comparison the 85C series (LQ etc) have the same leakage
> >current specs.
> >BTW the spec is for a capacitor having the rated voltage applied for 5
> >mins, measurement
> >is taken after the 5 mins. How does this compare with the CDE parts?
>
>
> Go on-line and see for yourself. There is simply too much data to belabor
> the reflector much longer.
>
> 73 Carl KM1H
>
>
>
>
> >We see very little
> >US component data here, mostly Japanese and European, would be
> >interesting to compare the
> >various manufacturers.
> >
> >John ZS5JF
> >
> >
> >
> >----------
> >> From: Rich Measures <measures@vc.net>
> >> To: km1h@juno.com; amps@contesting.com
> >> Subject: Re: [AMPS] Ripple current ratings of high voltage caps.
To: <amps@contesting.com>
> >> Date: 06 March 1999 01:31
> >>
> >>
> >>
> >>
> >> >
> >> >
> >> >>>Hope this of some interest as I feel that spending $$
> >un-necessarily on
> >> >>>105C rated capacitors to end up with less ripple current
> >capabilty is a
> >> >>pointless fact.
> >> >>>
> >> >>Ä 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 anode
> >supply.
> >> >>
> >> >>- later, John
> >> >>
> >> >>
> >> >>Rich...
> >> >
> >> >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 at 85c. Even at 45c the 105 c cap has a significant
> >edge.
> >> >
> >> >Further, at equivalent 85c temperatures, the ripple ratings are
> >almost
> >> identical.
> >> >
> >> >IMO, in an anode supply of an amp in the 1200W or higher category
> >the
> >> >105c cap will make both life and economical sense.
> >> >
> >> ? amen, Carl. I have replaced plenty of 85 deg C rated
> >electrolytics.
> >> I have replaced no 105 deg C rated electrolytics.
> >>
> >> >Personally, I would not want to use the ALL Electronics specials in
> >> >anything much above a SB-200 size amp without running temp and
> >leakage
> >> >tests.
> >> >
> >> ? Agreed. Anything over 250uA of leakage at the rated V is
> >suspect.
> >> Also, capacitors that are slow to reform are showing signs of aging.
> >
> >>
> >>
> >>
> >> Rich...
> >>
> >> R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
> >>
> >>
> >> --
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> >
>
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