14 Sep
2010
14 Sep
'10
19:29
Anton Aylward wrote:
I don't know about heavy, though. Back in the mid 70s I needed a 50W PSU for a piece of avionics I was working on. I pulled the catalogues and built a custom switched mode PSU that fitted in one of those kitchen-size matchboxes[1]. The toroidal transformer - OTS - was about as big as my thumb. The 'trick' was running it at high frequency.
Switch-mode - some 25 years ago I had a PDP11-04 in my workshop - no switch-mode in that thing. Lots of heavy copper windings on the enormous transformers. -- Per Jessen, Zürich (14.8°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org