[Test-Equipment] Putting power to 7904 out of storage

[chearn at widomaker.com]

Dennis,
You may be right about the switching PS requiring different start-up  
procedure.  In any case, I'd recommend monitoring the input current to  
be sure it does not get excessive.  I have used, for decades, a  
metered variac to power up long dormant equipmwnt; maybe even saved a  
few power transformers.

If you have a variable voltage DC supply, you might consider applying  
dc to input of DUT PS filter circuit and monitoring the current as DCv  
is increased.  This procedure will also reform long dormant  
electrolytics. Cheers, Chase/K4AFW


Quoting Dennis Wade <sacramento.cyclist at gmail.com>:

> Good evening all,
>
>           I'm going to be putting power to a 7904 that's been in
> storage for several years.  What precautions should I take..i.e.
> should I use a Variac?  With  linear power supply I'm fairly
> comfortable, but I'm not sure if bringing up the line voltage slowly
> to a switching mode PS will cause more problems than it might prevent.
>
>             Thanks in advance,
>
>              Dennis
>
>
>
> --
> Dennis L. Wade
> KG6ZI
> Carmichael, CA
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>