19 May
2009
19 May
'09
6:15 p.m.
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.
--Chuck