[Elecraft] Electrolytic Capacitor failure

[Phil Hystad]

Contributing to the Astron fan mail…

My main shack PS is Astron RS-50M with two RS-35M in backup.  I originally had just the two RS-35M supplies but just had to move on up.

Never a problem with any of them although the RS-35M supplies are not actively being used at this time.

73, phil, K7PEH


> On Apr 17, 2020, at 1:52 PM, Lyn Norstad <Lyn at LNAINC.com> wrote:
> 
> Currently (no pun intended) I am using an Astron VS35M which gives me a linear, fully variable (both voltage and max current) metered supply.  It's a workhorse and the size is perfect for my shack.
> 
> I also have a decent switching 35 amp supply as a backup.
> 
> 73
> Lyn, W0LEN
> 
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bob McGraw K4TAX
> Sent: Friday, April 17, 2020 2:50 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Electrolytic Capacitor failure
> 
> All of my supplies have both voltage and current meters and they are in 
> a position I can see them when I turn them on.  With supplies which do 
> not have meters, when one turns them on, you never know in advance and 
> get what they deliver.  In my case, I observe the meters BEFORE turning 
> on a radio.  On more than one occasion this has saved a radio due to a 
> power supply regulation failure.  Dumping 24 to 32  volts into a $3000 
> radios is not very pretty.   Oh yes, the supplies do have OVP, Over 
> Voltage Protection, but I've seen this fail as well and I've repaired 
> several supplies where this did fail.   And one doesn't know it has 
> failed until the voltage goes to maximum value.   Its too late then to 
> find out the OVP circuit has failed.   A meter would have prevented 
> radio and accessory equipment damage.
> 
> 73
> 
> Bob, K4TAX
> 
> 
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