Re: Charging Capacitors

Hello,

If you use the lamp or 30-50K R to limit current you can turn the
voltage up near the WVDC within a few minutes with no ill effect.

And reliably reform them in an hour or so... (at least with 47Kmfd,
40 volt mallory caps<G>)

Ballendo

--- In CAD_CAM_EDM_DRO@yahoogroups.com, wanliker@... wrote:
>
>
> In a message dated 6/2/2006 11:08:45 A.M. Mountain Daylight Time,
> n4ft@... writes:
>
> he reforms the capacitors using a variac. He starts the voltage
very
> low and slowly brings it to normal over several hours.
>
>
>
> The variac will put out a variable AC voltage, so you have to run
its output
> thru a Rectifier before the voltage is applied to a capacitor.
>
> You can start reforming it with a battery charger, observe
polarity. Then
> apply power supply voltage via about a 1K resistor, for short
periods. The
> lower power supply voltages would be best, main thing it to take
the voltage up
> slowly over a period of hours, in as small steps as possible with
the
> equipment you have available. I have an old Heathkit DC HV
supply, so I just hook it
> up and bring it up a few volts at a time over a day or two. In
that case,
> I can also watch the leakage current. I set it below the place
where it
> starts to climb rapidly
> bill
>
>
> [Non-text portions of this message have been removed]
>