Hello Chris, Thursday, July 06, 2000, 4:18:24 PM, you wrote: Cac> In a message dated 05/07/00 05:48:05 GMT Daylight Time, angel@............ Cac> writes: >> I just got me new computer and much to my chagrin now all four of the >> traces on SDR are much noisier. Little spikes, jus ta few counts. When I >> turn off the >> new computer the noise goes away and when turn it on the noise comes >> back. Obviously one solution is to not turn on the computer. Are there >> any others? Cac> Two quick thoughts. Have you checked that the Earth connection to your Cac> power socket really IS Earth and it's resistance? Second, it's a new computer Cac> and it is giving problems --- COMPLAIN and demand that the shop get it fixed. Cac> Why should YOU have to solve the problem? Cac> Regards, Cac> Chris Cac> __________________________________________________________ Cac> Public Seismic Network Mailing List (PSN-L) Cac> To leave this list email PSN-L-REQUEST@.............. with Cac> the body of the message (first line only): unsubscribe Cac> See http://www.seismicnet.com/maillist.html for more information. Hi Chris, You should come to Panama and try to return anything! Oh well, living here does have many advantage but returning things isn't one of them. I can hardly get most things! I do know that my Earth connections are not the greatest, but I'm not sure what to do about it. I have a wire going from the equipment rack to a ground rod. The AC power comes from an inverter that is about 75 feet away and also has a ground rod. From the inverter I get the AC via two wires, (no ground wire. The computers and power supplies to the seismos are powered by the inverter (modified sine wave). The monitors and non-essential stuff is powered from the gird and that does have a ground wire that I assume goes to a ground rod, quite possibly the same on the inverter is tied to. The power goes out for more than an hour at least once a week and every day there are dropout that last from a few milliseconds to a second. Clean power is also not one of the thing you live here for! I'm open to any grounding suggestions, I have considered just running a big copper wire to everything and to a central ground rod. Regards, Angel mailto:angel@............ __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>