7 Oct
1999
7 Oct
'99
9:07 a.m.
Scott Ware <ware(a)corestack.com> wrote:
On Thu, 7 Oct 1999 allisonp(a)world.std.com wrote:
Hi
Besides the ferroresonant transformers issue, if it is a
switcher power supply, many are configurable for 110V.
Often times there is a jumper on the supply to select
which it will be used on. When in the 110 mode, they have
a voltage doubler type of rectifier. This makes the
DC into the swithcing transistor the same. Some newer
switchers I've seen will run on a continuious range of
voltages from 80 to 250 volts. Still, look at the supplies
to see what your options are.
Dwight
Usually, (I know of no exceptions) if it runs on
50hz it runs on 60.
Weren't there a few S-100 boxes that used ferroresonant transformers in
the PSU? Plugging a device with a ferroresonant transformer (a
transformer+inductor combination that is quite well regulated but very
dependent on input frequency) into an incorrect frequency power source is
likely to yield unpleasant results.
Although ferroresonant transformers are relatively uncommon (except in
UPSes and line conditioning systems), the possiblity of encountering a
ferroresonant transformer in the PSU is a good reason to be careful when
powering up an unknown box on the "wrong" frequency for the first time.