20 Jan
2009
20 Jan
'09
1:06 p.m.
On Jan 20, 2009, at 12:35 PM, Rich Alderson wrote:
The KL-10, like other DEC gear, uses 3-phase input power as the
simplest
way to get lots of amps into the system: 60A @ 208 3-phase. All of
this feeds into a single gigantic boat-anchor grade transformer which
forms the basis of a linear power supply. 2/3 of that power goes back
out as simple heat.
Umm. No. That transformer is a ferro-resonant transformer. It
*needs* 3-phase to work! It supplies the basic 12v DC that are then
used to by the linear regulators. It's those that burn the power as
heat. Replacing the linear regulators with switchers will reduce the
consumed power by a lot.
TTFN - Guy