[ARC5] NOS Electrolytics

[J. Forster]

The supply I use is regulated w/ adjustable current limit (HP 6209B).

You can use any old adjustable supply and a DMM and current limiting
resistor.

I set the supply voltage to the rated DCWV of the cap and set the current
limit to keep the dissipation <0.5 W.

If you're doing the resistor setup, monitor the current and jack up the
voltage intermittantly.

These caps are about 2" long, and 7/8" OD, axial lead. After a while the
DO get very slightly warm.

IMO,it's a very good idea to keep the power limited to avoid any
overheating the guts of the cap.

-John

==================




> John:
>
> What voltage should be used to reform caps?
> I've got a lot of them with label voltages between 10 and 330 V.
>
> I have a table showing measured ESR on a bunch of caps at:
> http://www.prc68.com/I/Capacitors.shtml#Tbl
> On the page is also a procedure for measuring super caps
>
> I sell a combined ESR & Capacitance meter that's made in Russia.  See:
> http://www.prc68.com/I/ESRmicro.shtml
> I've made a number of repairs using this meter where there was no
> documentation.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.end2partygovernment.com/2012Issues.html
> http://www.prc68.com/I/DietNutrition.html
>
> Kenneth G. Gordon wrote:
>> On 1 Jun 2014 at 14:12, J. Forster wrote:
>>
>>> I want them to reform some before judging.
>> OK.
>>
>>>>> I've not measured the ESR or C as yet.
>>>> Oh. OK. I have at least two ESR meters here and have found them
>>>> invaluable.
>>> I've never been a real fan. I can measure it on a GR bridge.
>> Well, the two I have, a Dick Smith kit, and one I bought off eBay, work
>> very
>> well, are quick, and have other uses too.
>>
>> I have a couple of bridges, including a really beautiful military one,
>> but they
>> take too long to set up for a single use.
>>
>> If I were going to use it to test a bunch of caps, I would use it, but
>> otherwise it
>> is too much trouble,
>>
>> Ken W7EKB
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