On 7/16/2012 10:36 PM, W2RU - Bud Hippisley wrote:
> Herb (& others) —
>
> I struggled to keep my 160- and 80-meter RF out of my DSL equipment for a
> number of years. Multiple turns of all cables in/out of the DSL modem
> (Siemens Speedstream) on #31ferrites, etc. The best progress occurred when I
> wrapped the modem in common kitchen aluminum foil and very carefully attached
> a ground wire to the foil. (Use very big flat washers on both sides of the
> foil!) But I still experienced occasional disconnects.
>
> This past year my telco started supplying Westell Model 7500 DSL modems to
> new customers and my favorite telco tech saw that I got one, too. I haven't
> observed a single DSL outage since then. And I haven't even wrapped it in
> aluminum foil!
>
> Other things that will help:
> * If you can do it, relocate your incoming telephone line and/or your
> 160-meter antenna (and its radial field) for greater separation of the two or
> for altered orientation between the two.
> * Get your 160 (and perhaps 80) antenna farther from both the outdoor
> telco line and the indoor telco lines (i.e., your house).
>
> Bud, W2RU
>
> On Jul 16, 2012, at 9:34 PM, KL7RA wrote:
>
>> I solved this exact problem by blowing up the DSL modem on 160 and
>> ACS came out with a new one they said was more RFI proof and it was.
>> Westell is on the factory logo.
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
Thanks to all who responded with suggestions. It is interesting that
nobody suggested the K-Com or K-Y filters. I looked up the Westell 7500
and see that it is a modem router with no provision for a telephone like
my present DSL modem has (Zhone). My modem is a simple pass through
unit that separates the telephone service from the internet and provides
me a single RJ-45 that goes to my router. I am left with putting ferrite
cores on the power cable from the wall wart and I will also plug my lap
top directly into the unit to see if the 60 foot CAT 5 cable going to
the router being removed has any effect. Then I guess the aluminum
foil shielding or even building an aluminum enclosure with all leads
filtered may be what I have to do. I will also ask the DSL provider if
they have any newer modems.
Thanks again for you help on this problem.
Herb Schoenbohm, KV4FZ
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
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