Power supply question

[Neil Morrison]

----- Original Message -----
From: "Eric Pierce" <eric_pierce at SYMPATICO.CA>


> IMHO:
>
> 1) Many switching power supplies need a MINIMUM amount of current
drawn
> to work, some will not even start up without a load. 10% of full
output
> is a good rule of thumb.
>
> 2) How are you going to "divide" the voltage to get 23.7 and 13.8?
If
> you use some kind of resistive voltage divider then there will not
be
> any regulation, the output will only be right for one specific
output
> current. If you are going to design some kind of active regulator,
then
> you are in for almost as much work as if you build a power supply
from
> scratch.

I'd be inclined to consider rewinding the output transformer to put
out the required voltage(s). Yes, I know it needs the feedback
modified to suit, but that seems a more reasonable way to do things.
At least it has the rectifiers needed for this sort of amp draw.

Neil

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