EVERYTHING FOR ELECTRONICS
EMI ... OH MY!
While International Rectifier is an
experienced and venerable company, it
looks like their latest press release on
their LS series radiation hardened power converters needs a bit more editing.
They tout "Built-In EMI"! Well, who wants
that?! Maybe "Built-In EMI Suppression"
would have made more sense. BTW,
their claimed compliance with MIL-STD-
461C is odd, since that version has been
obsolete for about 13 years.
San Diego, CA
I went back to my original file and
checked it out. The version I submitted has the term EMI in it only twice —
once in the photo caption and once
in the body. In both cases, it is followed
by the word "filter." I wouldn't worry
too much about it, though — anyone
who knows what EMI is knows it to be
undesirable and would read it either
as a typo or just shorthand for "EMI
protection." I thought the most amazing thing about the device is the price.
My recollection is that some government contracts call for equipment to
be compliant with earlier versions of
MIL-STD-461. This could be because it's
an old contract that was never updated
or because a particular application doesn't need to meet the most modern specs.
The latest version I have on hand is
461D, from back in 1993. I think we're
up to 461E now, but I don't do much in
the EMC area anymore, so I never picked
up the new one. It's not exactly coffee
table material. But for whatever reason,
the IR press release does say 461C.
A HAPPY HOBBYIST
I wished I started with my sub-
Continued on page 99
by J. Shuman
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