[Boatanchors] Reforming caps

[WA5CAB at cs.com]

First, electrolytics should always be re-formed or tested at rated voltage.  
Even if you do not intend to use them at rated voltage.  But second, TM 
11-5043-12 on the ZM-3/U and ZM-3A/U states 5 mA at rated voltage is the discard 
point.

In a message dated 5/23/2008 6:29:27 PM Central Daylight Time, 
km1h at jeremy.mv.com writes: 
> Its a little high but OK for a low V PS; it might require a lot more time 
> to 
> fully reform for use at 400-450V. For a series string in a HV doubler I 
> prefer them at 50 ua maximum at rated voltage.
> 
> Carl
> KM1H
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Barrie Smith" <barrie at centric.net>
> To: "Boatanchors Mail List" <boatanchors at mailman.qth.net>
> Sent: Friday, May 23, 2008 6:47 PM
> Subject: [Boatanchors] Reforming caps
> 
> 
> Found some electrolytic caps that will serve in a small power supply, if 
> they are still good.
> 
> They are 220 uf @ 450 volts.
> 
> For the last hour I've had one of them running at 200 volts, with a leakage 
> current of 110 microamps.
> 
> Don't remember for sure, but it seems that 1000 microamps at full voltage 
> was maximum leakage current.
> 
> Anyone know for sure?

Robert & Susan Downs - Houston
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