Hmmmm........
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Hmmmm........
I'm still scratching my head trying to figure out how the fuck you get RF into a DSL modem when on a dummy load. Is the modem sitting on top of the dummy load?
What kind of dummy load is this?
No, the modem is at the end of the house (about 40 feet away) and not near the antennas or feedlines. The phone lines might cross the feedlines in the basement. I am sure they do.
BTW, since putting the T130-2 on the power line to the modem the Dummy load does not cause problems.
EDIT: The Dummy Load is an old Drake DL-300....300W if I remember correctly.
That would indicate to me that the phone line, the AC line, and the feedlines are all running next to each other. Like right on top of each other.Quote:
Originally Posted by KA9MOT
I don't walk well and can usually get down the basement stairs but then have to crawl up them. Some days I do better, so the nest time I'm feeling spry, I'll go down there and have a look.
My wife is afraid I'll fall down the stairs and I have but I've always been at the bottom when I did. 1 or 2 stairs is only a bump.
Through the AC lines. I'm suspecting a less-than-perfect electrical safety ground system.Quote:
Originally Posted by KJ3N
I don't know. Nothing else in this house is affected by this. No cheap computer speakers or anything. My neighbors say they are having no trouble. My old cable modem lived right here in the shack and was unaffected by my radios.Quote:
Originally Posted by KC2UGV
I think it is a crappy cheap modem.
Well, it's a combination.Quote:
Originally Posted by KA9MOT
Many things are somewhat resistant to this sort of thing, either through purposeful design, or by accidental design. I think it's a crappy design for the Westell modem, coupled with a less-than-perfect (Not saying defective, just not-perfect) electrical grounding system.
My DSL modem kicked over every time I keyed up on 30M, until I added toroids to the power lead. Yes, I have a less-than-perfect electrical ground, and less-than-perfect station setup.
As for the crap design, there's a reason they can give away those modems. A DSL interface for a piece of Cisco gear runs about $400 bucks. And, it's just a small card like this:
http://www.cisco.com/en/US/prod/coll...04_26_05-1.jpg
But it will NEVER have an RFI issue, no matter how crappy the station is setup. Given the fact that DSL uses HF frequencies, it's not all that surprising a cheaply designed interface will have issues. Cable uses UHF, if I recall correctly.
If you have an old AM portable, yank out the ferrite bar antenna, remove the coil, and wrap the telco wire around it.
For a "cheap" potential fix. A friend who got horrible RF into his computer speakers used 'em, and this fixed it.
Well, I got to thinking about it and realized the Phone Companies Drop from the pole was about 20 feet away from the OCFD running parallel with it, and only 2 or 3 feet away from my Butternut. I placed 5 of the snap on ferrites on the phone line where it enters the house and my problem appears to be resolved.
Thanks for all of your help!
That would do it. :doh:Quote:
Originally Posted by KA9MOT
:clap:Quote:
I placed 5 of the snap on ferrites on the phone line where it enters the house and my problem appears to be resolved.
Yes! :clap: :clap: :clap:!Quote:
Originally Posted by KJ3N
Stupid ferrite tricks work, eh?
Frozen legumes...
Allswell that endswell!
You know, I still had an occasional problem with that DSL modem on 75M...... So I dumped it and switched back to cable...... DOuble benifits....the DSL was 2MB sec on it's best day and cable is 24MBs on it worst day, and no more RFI..... It's a good day in the shack.