Hi If you are putting out > 20 watts and I'm close enough to see your mailbox, I'll detect you with some pretty simple stuff.
Bob On Feb 25, 2011, at 1:16 PM, Chuck Harris wrote: > I guess that is why I mentioned something about doing it competently. > > The FCC so seriously winged the methods usable by hams as to render them > effectively useless. > > A nice direct sequence spread spectrum system with a couple of MHz > spread would be well below the background noise of any narrow band > receiver. Sure, you could find it with a wide band detector if you were > close by, but how would you know that you weren't looking at some other > anomaly, like a bad insulator, or trash coming off of fluorescent lamps? > > Done correctly, you could run spread spectrum just about anywhere you wanted > to, and remain undetected. Using direct sequence, you would be so low in > power density that it could easily be argued that you were operating within > the constraints of a part 15 device's leakage. > > -Chuck Harris > > Bob Camp wrote: >> Hi >> >> Remember that this started out running a sequence that was 127 hops long. >> With something that short, it's pretty likely you will be rude to somebody. >> >> Even if you are running a massive hop rate, I can likely walk around and >> track you down within the average neighborhood. A diode detector behind a >> bandpass filter and a small-ish directional antenna is about all I'd try to >> use. >> >> I suspect it would also work with one of the power detector chips. Range >> wise, a lot would depend on just how good your local cable company is at >> keeping their stuff running right. I'm not really sure the chip would add a >> lot of range in a normal setting. >> >> Bob > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
