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Subject:
From:
colin McDonald <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Wed, 8 Sep 2010 21:19:18 -0600
Content-Type:
text/plain
Parts/Attachments:
text/plain (67 lines)
as far as RFI issues.
well, here's my personal situation.
I have a 2wire wireless router/modem as supplied by my internet provider.
range is excellent, and wireless speed is exactly the same as when connected 
directly to the LAN.
however, after some investigation recently, I found that all my really bad 
noise issues on HF and VHF/UHF, in fact, pretty much any where my radio 
receives, was coming from the router.  I tried ferrite rings, different 
electrical outlets and on and on, but the noise occurs even on HT's in the 
apartment.
After some more trouble shooting, I actually isolated the problem to my 
digital PVR TV box.  Disconnecting that got rid of the noise utterly...not a 
peep of noise on HF or VHF.  the noise basically sounds like carriers on FM 
and hetrodyn on HF.  So i'm not really sure if it is the router causing the 
noise when transfering data down the fairly long run of cat5 to the tv box, 
or the tv box itself.  I tried ferrite rings on the tv boxes power chord, as 
well as the network cable it uses...no luck in even quieting the radio 
noise.
I've got a 20FT run of cat5 going to a computer in the radio room, and when 
I disconnect this cable from the router, the noise gets reduced a 
little...unplugging the tv box gets rid of it completely.  My thoughts are 
that the tv box is to blame here and is putting some crazy amount of data 
noise onto the cables and thus making the smaller run of cat5 going to the 
pc act as a radiater of sorts for the noise.  Any other cables attached to 
the LAN seem to do the same thing, act as radiators.

Really not sure what to do here.
The noise can get up to 40 over S9 on VHF, so bad in fact that I can't 
monitor simplex frequencies or repeaters that don't have PL tones.  On HF, 
the hetrodyn is S8 to S9.  it's in different places across the bands, so I 
can still receive signals, as long as they aren't on frequencies where the 
noise occurs.
this is digital TV, meaning that it is supplied over the internet and 
distributed in the house to digital boxes on the LAN from the router.
So, I guess if you have tv boxes that you'll be connecting to the router, 
you'll have to watch out for this.
when the tv box is disconnected, the wireless doesn't seem to make any noise 
at all on HF, VHF or UHF.
i've tried moving antennas and rerouting feedlines, no luck there either.
73
Colin, V A6BKX
----- Original Message ----- 
From: "Fred Adams" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 08, 2010 7:12 PM
Subject: Wireless router


>  Could some of you guys suggest the best wireless computer router that you
> think is best?   Are wireless routers hard to program and does ham radio 
> RF
> get into computers any easier with wireless routers?  I would appreciate 
> any
> info or suggestions on this as I am thinking of changing from a cable 
> router
> to a wireless router.
>
>
>
> Best wishes,
>
>
> FRED C. ADAMS W4HC
> THE HOUR IS LATE AND
> THE NIGHT IS FAR SPENT
> VOTE IN NOVEMBER 

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