Al salaam a'alaykum Tom

23 Dec 03 10:36, Tom Walker wrote to David Drummond:

 ->> Does a switchmode supply not need an AC source (as in is it somehow 
 ->> locked to the frequency of the mains)?

 TW>  Yes it does need the 60 Hertz line frequency to operate. One 
 TW> designed for operation from DC, be it 12/120/220 would need it's own 
 TW> internal Frequency reference.

Are you really sure? Computers often come with a 120/230VAC switch on the
back of the PSU - no mention of 50 or 60 Hz though.


Regards,
David

--- Msged/LNX TE 06 (pre)