[RFI] Line filters for VHF?

N1BUG paul at n1bug.com
Wed May 20 15:04:54 EDT 2015

I have been wondering about this for a while. AC line filters for HF 
are everywhere. Most are characterized up to 30 MHz. Are there some 
that work well at 147 MHz? I got tired of digging through data 
sheets as they all seemed to be for HF.

At the moment I'm trying to stop RFI from a computer. When "sniffed" 
with a detector the case seems quiet but the AC power cord certainly 
is not. The first three Fair-Rite 0443164251 snap on cores helped 
but adding more after that didn't. The line cord and associated 
wiring in the building is still radiating noise.


Paul Kelley, N1BUG
RFI Committee chair,
Piscataquis Amateur Radio Club

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