[ARC5] Computer Power Supplies

[hwhall at compuserve.com]

Is there no transformer in it? If not, then like other transformerless supplies, it'll have no isolation from the line. 


 Wayne
WB4OGM

 

-----Original Message-----
From: Robert Eleazer <releazer at earthlink.net>
To: arc5 <arc5 at mailman.qth.net>
Sent: Thu, Aug 14, 2014 3:30 pm
Subject: [ARC5] Computer Power Supplies


Speaking of power supplies, I ran across something interesting the other day.

A trip to the airport dumpster revealed that someone had thrown out a PC. It was 
not worth anything, but the power supply they had removed and dismantled was 
interesting.  What is unusual about it is that it uses a separate module that 
features an AC power connector, a full wave bridge, some torroid inductors and 
an open frame inductor (transformer with only two wires).  Output is in the form 
of 3 wires leading to the rest of the power supply.  There are no caps on it.

When powered up those three wires have 208 VDC across the outer two and about 
118 VDC from the center connector to the outer two.

I don't know how many computer power supplies are like this one, but I think 
that feeding the output of that module into a few caps might produce a useful HV 
DC power supply at little or no cost.    Any comments?

Wayne.



  
______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html