Need Info: "LH Research" Power Supply

From: Dwight Elvey <>
Date: Tue Jul 6 21:14:21 1999

Kevin McQuiggin <> wrote:
> Hi Gang:
> This is a longshot, but I am looking for a schematic (or even a pinout)
> for an LH Research power supply, model number IM203. It's 120VAC to 5
> VDC_at_8A, 12 VDC and -12 VDC both at 1.5A.

 I don't know the particular supply you are looking at. The first
thing to determine is if it is an analog or switcher.
This is most easily determined by the ratio of transformer space
to electrolytics. One big transformer and only a couple of large
electrolytics and it is analog. Small transformer and a lot
of electrolytics ( some rated for high voltage ) and it is a
 Where you go from here is related to what you have.
Received on Tue Jul 06 1999 - 21:14:21 BST

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