[UK-CONTEST] 80m and ADSL

[Clive Whelan]

Hi John

There is no inherent problem as I also run a Butternut at up to 400w, as 
well as an HF yagi and have no problems, with a wireless router actually 
about 4ft from the amp. and antenna switch

Do you get the problem into a dummy load, that would be quite a 
significant test to do.

I suspect that clip on ferrite is minimally effective at HF in general, 
and 1.8/3.5 Mhz in particular.

What might be relevant is that when I moved to this QTH I had serious 
trouble with RF- on 3.5Mhz only- tripping my burglar alarm. Things are 
better now, but one of the problems was that RF was getting into the 
house wiring, and feeding into the system via "the  back door". In such 
situations, I find that winding the mains lead onto a toroid is quite 
effective.

wrt Your other query, BT's "home hub" has a "manager" which can report 
on all sorts of stuff.


hth


73



Clive
GW3NJW


73



Clive

John Lemay wrote:
> Morning all
>
> Maybe a little off topic, but I know there's a mine of information out there
> !
>
> I might be giving our local (Colchester) club a bit of support in some of
> the 80m contests this year (AFS and CC). With just 100w to a Butternut I
> won't be exactly challenging the leaders, but it's the group effort which
> will benefit.
>
> Anyway, to get technical:- Whenever I run more than 20w or so on 80m, I
> notice that my ADSL connection is interrupted. As far as I can tell, the
> landline phone itself is not affected. I'm a bit concerned I may be having a
> similar affect on my neighbours.
>
> I have simple "clip-on" ferrites on all leads but suspect that at relatively
> low frequencies like 3.5MHz these might not be effective enough? The cable
> just passes through the ferrite; there are no multiple turns.
>
> I've noticed in addition that for other unknown reasons, I occasionally lose
> my ADSL for a minute or two. I can't be watching the leds on the wireless
> router all the time, so I'm wondering if there's any bits of software I can
> monitor my connection with over a long period? A "Google" has not been
> fruitful.
>
> Thanks in anticipation
>
> John G4ZTR
>
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