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Re: Monitor recapping and low ESR

Posted: Mon Oct 08, 2018 6:10 pm
by sandord
For example, let's look at the first to caps in my list:

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As far as I can tell, both DF and impedance@100 kHz/+20C tell something about ESR, am I right?
But neither of them lists both, so that's why I was wondering how to compare the two.

Of course I might be completely off track here, trying to grasp all this :oops:

Re: Monitor recapping and low ESR

Posted: Mon Oct 08, 2018 6:45 pm
by exxos
Your trying to compare to many different things at once...

Some manufacturers will list the actual ESR value (in mR typically) but the only one you really need to take notice of his current rated in mA. Because the higher the current the lower the ESR anyway... You don't really need to know both figures.. Some manufacturers do quote both of them but not always..

Also physically larger capacitors have generally have a better ESR figure (given a similar voltage & uF specs) .. In particular with Panasonic they will do a standard version and a "L" (Long) version which will have better ESR figures (higher ripple current in mA).. So if you have the extra height you can use that one instead of the short version. Also mA (ripple current) is inherently higher the higher the capacitance value gets.

A Example what I mean is listed below.. This is comparing a Panasonic "M series" with a "S series" (this is probably not good as the S is a SMT part, but I'm just trying to point out the differences in series of capacitors and values)...

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Where this basically shows a 470uF 25V capacitor with a ripple of 380mA.

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And here we have same 225V 470uF, with a higher 480mA rating.

Maybe worth mentioning again actually, the SMT parts are generally bad ESR rating because they are physically small. And the 480mA (M series), will likely be physically larger giving better rating..

If that particular capacitor was twice the height, then the ripple rating would probably be something like 650mA just a example.

In any case, the higher that figure, the lower the ESR figure and the better the capacitor will be.. You really don't need to worry about anything else is if that figure is low then everything else should be good anyway.

Of course if you find a capacitor that is 2,000mA, though it is going to be a lot lower ESR figure and will generally be much better capacitor in all respects anyway.

It can get a rather complicated subject, really just only take notice of the mA figure.. Some manufacturers may list the actual resistance instead of the mA figure.. But this is generally one reason I like Panasonic as they are pretty consistent and just list the mA figure which makes life a lot easier... Trying to compare multiple things will just likey make you go insane :)

Re: Monitor recapping and low ESR

Posted: Mon Oct 08, 2018 9:34 pm
by sandord
exxos wrote:
Mon Oct 08, 2018 6:45 pm
...
Thanks, everything is slowely becoming clearer now. You advice to focus on the ripple current is just what I needed and I can see why.

I can also see a clear correlation between Panasonic low ESR series and their ripple values in my list. I'll try to get the ripples of the rest of the caps as high as I can, without getting too extreme of course.

When I'm done with the recaps, I will post pictures and cap lists.

Re: Monitor recapping and low ESR

Posted: Wed Oct 24, 2018 10:43 pm
by sandord
Aaargghh!! There are caps EVERYWHERE!!! :stars: :roll: :-x
Those bags aren't even half of them...

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Re: Monitor recapping and low ESR

Posted: Wed Oct 24, 2018 10:53 pm
by exxos
sandord wrote:
Wed Oct 24, 2018 10:43 pm
Aaargghh!! There are caps EVERYWHERE!!! :stars: :roll: :-x
Those bags aren't even half of them...
I got a wall of caps ;)

Re: Monitor recapping and low ESR

Posted: Wed Oct 24, 2018 11:10 pm
by sandord
exxos wrote:
Wed Oct 24, 2018 10:53 pm
I got a wall of caps ;)
:shock:

Actually, I'm a bit jealous. There's something about caps. I don't know. I just want to buy them. Lots.

By the way, did you know that Chuck Norris can replace any cap with his fingers?

Re: Monitor recapping and low ESR

Posted: Thu Oct 25, 2018 10:25 am
by exxos
sandord wrote:
Wed Oct 24, 2018 11:10 pm
:shock:

Actually, I'm a bit jealous. There's something about caps. I don't know. I just want to buy them. Lots.
viewtopic.php?f=32&t=126

Plus new shelfs in the bedroom for storing multiple other boxes now , I can't find anything anymore :roll:

Re: Monitor recapping and low ESR

Posted: Thu Oct 25, 2018 4:35 pm
by IngoQ
I bought Panasonic low-ESR caps for 80 EURs a couple of weeks ago, just to stock up again... I know how you feel ;) It is actually quite nice to be able to spontaneously recap something on a sunday :)

Re: Monitor recapping and low ESR

Posted: Thu Oct 25, 2018 6:21 pm
by sandord
IngoQ wrote:
Thu Oct 25, 2018 4:35 pm
I bought Panasonic low-ESR caps for 80 EURs a couple of weeks ago, just to stock up again... I know how you feel ;) It is actually quite nice to be able to spontaneously recap something on a sunday :)
Yeah, that's really nice!
I'm currently recapping a couple of monitors and I ordered extra for the same reason.

Re: Monitor recapping and low ESR

Posted: Fri Oct 26, 2018 8:40 am
by sandord
I finished the recapping of my 1084-D2 and the picture is rock solid again! This is so rewarding, I'm afraid I'm already addicted.

There are three monitors on the line so I won't be finished any time soon. The next candidate is a 1084-P1 (for which I already have the caps) and then two SC1224s.