>> Has anyone on the reflector had such a problem and found a way to cure >> it? >> Searching on the internet I find that RFI from routers is a well known >> phenomenon, but I have seen no suggestions for curing the problem.
FWIW I found that using shielded twisted pair (STP) ethernet cables rather than the more common unshielded twisted pair (UTP) helps. STP cables have a foil shield over the pairs of cable which is grounded to the equipment chassis by a metal outer on the RJ45 connector. It's still worth putting a ferrite on each end of the cable. I've got a Draytek broadband router that puts out loads of QRM right over the HF bands and beyond 2m. When I had a look inside I found it's got a PCB containing a switching regulator, a fast CPU and the line transceiver for the ADSL. This just sits inside a plastic box with no attempt at screening whatsoever. I think the fix is going to be to put the whole lot into a larger metal box and filter the connections in and out. Needless to say, a product to avoid if you value a quiet electrical environment! Putting a wireless LAN router in a metal box probably defeats the object of having it, unless you can wire the antenna to an SMA connector on the outer box, I suppose. Finally another source of noise I find is video cables connecting cable / satellite set top boxes to TVs. Here you get a signal with strong 50 / 100 Hz components (OK. 60/120Hz for most of you I guess!) that varies in amplitude with the brightness of the picture. Hi to all (first post here). K2 kit on order... Kevin G7BCS _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
