Mark,
Two sources of reasonably priced LINEAR power supplies are: Marlin P.
Jones Associates (in Florida) and Mendelsohn Electronics (in Dayton, OH).
Both are "surplus" type places, but they have extensive power supply
inventories. (They both have websites and 800 numbers.) In some cases, you
can get a linear that has input voltage selection (120 or 240), if you need
that option. You may have to provide/wire the output to the monitor
yourself.
One brand of switcher that I had some industrial experience with (and found
to be low in radiated emissions) was Cosell, from Japan. You sometimes
find their units in surplus. However, the enclosure case is an option on
those (they are sold mainly to OEMs), so be certain you get one that
includes a full case if you elect to try that route. However, a linear
supply is still the safest bet. Good luck.
73, Dale
WA9ENA
MZAVATSKY@FAIR1.FAIRFIELD.EDU@contesting.com on 11/04/2000 07:21:44 PM
Please respond to MZAVATSKY@FAIR1.FAIRFIELD.EDU
Sent by: owner-rfi@contesting.com
To: rfi@contesting.com
cc:
Subject: [RFI] Power supply interference
I recently purchased a NEC flat panel monitor which I like very much, my
problem is the small power supply that came with it. The ps is giving me
alot
of junk on hf I know it is the ps because even when I disconnect it from
the
monitor the interference doesnt go away until I unplug it from the wall, I
wrapped both ends (it is the kind that has a cord that goes to the monitor
and one to the outlet unlike a wall wort hi!) with ferrite donuts and it
did
nothing.. I guess my question is there a place that sells power supplies
like
this that maybe better filtered it,s specs are input: 100-240v 1.2A
output: 12v 4A center pin + , I went to Comp USA and RS but no luck I would
really like to just replace it with a better one if I knew where to maybe
get one, also when I actually touch the supply itself the noise goes up and
down I beleive that the Ps is just a junky unfiltered one I had a problem
like
this once in the shack with another piece of equipment and just found a
comp-
atible one of the same specs and replaced it except that one was a little
easier to find then this one,, any ideas or comments are appreciated Thank
You 73,s
Mark Zavatsky K1ZZZ ex: HL9WK
Fairfield,CT.
MZAVATSKY@fair1.fairfield.edu
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