[160m] Re: Topband: ADSL 160 meter RFI problems

W0MU Mike Fatchett w0mu at w0mu.com
Thu Jan 3 18:21:00 EST 2008


Curious...

I have the same problem with my ADSL Zoom router on 40m.

I have bandpass filters and a harmonic filter for 40 yet it still wipes 
out the DSL.

I have done very little to track down the issue.

Tom Rauch wrote:
> I had ADSL installed last month because I was having 
> problems receiving and sending mail via my remote mail host. 
> BellSouth is actually where the problem was at for email. 
> :-)
> 
> Anyway despite having a very clean installation (shielded 
> buried phone lines) and antennas several hundred feet away 
> from the ADSL system and phone lines.... 160 would just kill 
> the DSL modem. Even a dipole 300 feet high and 400 feet away 
> that had little RF in any of the lines would knock the modem 
> off line. I even built a very good 160 notch filter and 
> could not cure it.
> 
> The original modem was a Netopia 2210-02 modem. It's a tiny 
> little silver modem.
> 
> ATT sent me a 2701HG-B Gateway as a no charge exchange and 
> all the problems vanished. Even beaming straight into the 
> building where the modem is or using a dipole right outside 
> the building doesn't cause any connection problems. (I still 
> have the 160 notch filter I built in line.)
> 
> 73 Tom
> 
>  
> 
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