S-100 power supply transformer
cclist at sydex.com
Tue May 19 13:15:07 CDT 2009
On 19 May 2009 at 7:56, dwight elvey wrote:
> It make no difference what type of rectification is used,
> fullwave bridge or center tap. Watts are watts and there is
> no way around it.
What surprises me is to see that a transformer with 2 secondary
windings would be operated with the windings in parallel to feed a
bridge rectifier rather than in series to feed a full-wave center-
tapped arrangement. Why incur the heat loss of an extra diode pair
with a bridge, when a simple 2-diode fullwave will do? With a low-
voltage high-current supply a substantial amount of power is
dissipated by those diodes.
Another thing that might be considered is a simple switching
regulator for the output to allow one to adjust the voltage for
optimimum on-board linear regulator operation. High-current FETs are
cheap and the circuit can be driven by a wide variety of choices of
IC. I realize that it wouldn't be "vintage", however.
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