[RFI] router RFI

[N1BUG]

On 03/04/2013 11:55 AM, Dale wrote:

> Paul, that is most unfortunate about the situation at your County EC
> person.  Separation distance is an effective tool to reduce the
> effects of unwanted emissions on victim receivers.  If that person
> can not move the antennas and LAN further apart, then the few
> remaining choices, other than turning off the LAN, would include
> forcing the LAN to run only in 10 Base-T (if that is possible) or
> shielding the equipment associated with the LAN.  Question: Do you
> know if the problem exists because of radiation from the cables, or
> could it be both cables and hardware?

Dale, I investigated this morning. It is very hard to determine 
whether cables or devices are doing most of the radiating, but the 
entire network has the 147.210 carrier present to varying degrees. I 
was able to identify two cables which seem to have particularly high 
levels compared to the rest of the system. It isn't as bad as I was 
expecting. If we could reduce the interference by 10 dB I think that 
would be enough to completely eliminate the issue. Forcing the LAN 
to operate at 10 Base-T speeds *might* be acceptable, but I will 
have to enlist the aid of an IT person to find out if that is 
possible and how to do it.

73

-- 
Paul Kelley, N1BUG
RFI Committee chair,
Piscataquis Amateur Radio Club
http://www.k1pq.org