On Monday 11 February 2008 09:54, Mark Rogers wrote:
Nick Daniels wrote:
Are you using the "HomePlug" type networking? The ones two doors from me are preventing me from using any band on my ham radio from 7Mhz downwards, and also MW radio. they generate an incredibly strong broadband "hash" over a very very large part of the spectrum
As a reseller of those devices this is news to me and merits some investigation.
If they're 2 doors down from you there's a good chance they're on the same phase as you which would in principle make it more likely they'd cause you problems than if they were next door, but all the same I've not heard of this happening before.
Do you know the brand of homeplug, or their speed (14, 85 or 200Mbps)? Any idea what the distance is between you and them? Have you done any tests that confirm the homeplugs to be the problem?[*]
I know practically nothing about ham radio, but can I assume that the interference is via mains and not radio? (Ie that your radio equipment isn't battery powered and therefore isolated from mains?)
[*] Please don't mistake any of this for "I'm sure the products aren't at fault and you've misdiagnosed it". You sound like you know what you're talking about and I've got no reason to believe that you're wrong. I just like to know about the products I sell, good or bad. If this is a brand of homeplug we have dealings with I'll talk to the manufacturer/distributor and find out if this is a known issue, or perhaps indicates a fault. In fact I'll probably ask the people we deal with anyway, but a little more info would be useful first.
If this is of no interest to the list I'm happy to take it off-list.
Hi Mark I do not know the brand or speed at the moment, but I know as soon as I took them out (with their permission) the interference ceases I only started looking into this this weekend, There have been articles in Radcom, the journal of the Radio Society of Great Britain concerning this interference, I will try to find them this week if you are interested? Allegedly they have a 25dB notch? in the ham bands?? but my receivers have a sensitivity of 0.05 microvolts. Will contact you off list, Mark when I find articles, and make and model of homeplug (cannot get to neighbours house until next weekend) I will be able then to find out if interference is mains or RF Distance from my house approx 100yds, on same phase. Distance from my antennas to their house approx 150yds Many thanks for your interest.
Kind Regards - Nick Daniels