[hpsdr] Starting BOM already

[Christopher T. Day]

Horst,

My Googling led me to understand that the issue is one of stability of
switching power supplies - particularly multiple output voltage ones -
under low load; I think that the feedback signal gets too small in some
designs. The point here is that it depends on the details of the
particular power supply design. One option would be to keep the minimal
load resistor, or whatever, inside the PSU box, but for cost reasons,
that's often not done. Anyway, it seems to really depend on the power
supply in question and apparently the picoPSU-120 is intrinsically
stable. No need to waste any of its output on a dummy load. We'll see.


	Chris - AE6VK


-----Original Message-----
From: H. Gruchow [mailto:horst at needles.de] 
Sent: Friday, March 24, 2006 10:32 PM
To: Christopher T. Day; Eric Ellison; Philip Covington
Cc: hpsdr at hpsdr.org
Subject: Re: [hpsdr] Starting BOM already

...

in the back of my head I have a figure of around 50mA of minimum current
the 5 Volt line should be loaded with on an ATX supply. ...

73
Horst
DL6KBF


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