I'm currently writing the EMC chapter for the 2010 ARRL Handbook, and
wanted to be sure to include info on good products like K-Com
telephone filters. The webpage is down, so I tracked down Mr. K-Com,
Pete Krieger, K8COM. We chatted for at least a half hour. For several
reasons, Pete chose to shut down his business a few months ago. It
was a combination of getting screwed by the corporate customers that
made up the bulk of his customer base and some health problems. Pete
is retired from Lucent.
So K-Com is gone. KY-Filters is very much there, and I've measured
two KY filters, one tuned to AM broadcast and one tuned to the HF ham
bands. Both K-Com filters and KY filters are common mode chokes. They
provide no intentional differential mode filtering. I have NOT tested
these filters for effectiveness, only measured their common mode
impedance.
If anyone has a K-Com filter, I'd love to measure it. Please contact
me off list if you would like to loan it (or donate it). My testing
is non-destructive. :)
73,
Jim Brown K9YC
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