> After returning from a rather long hiatus from ham radio, I discovered an > obscene amount of interference on the ham bands. I later learned that it > was largely the result of 6 Ethernet'ed computers in the house with cat 5 > wiring running all over, and 3 runs going through the ham shack.
In addition to what has been written already (make note of comments on noisy wall warts and other power supplies!), I should note that classic 10 Mbit ethernet uses 5 MHz machester encoding. This means that one only sees spikes every 5 Mhz (with sidebands, alas). 100BASE-TX, because of it's encoding, is a lot wider and hence a lot noisier. If you don't need 100 Mbit speed to talk to that 2 Mbit ADSL modem, then you may want to consider setting up a 10 mbit network. Does the trick every time in ad-hoc setups like with JOTA. Don't throw out the 'old' 10 mbit hubs, and when you do, give them to a fellow ham fore safe-keeping. 73, Geert Jan PE1HZG _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
