On Wed, 2012-07-04 at 10:15 -0400, W8ZV wrote: > > > Hi Bill!! > > Just for reference, my HP generates NO noise. It is possible to get > clean supplies, although I can't tell you what is in this box. This was > purchased as a complete unit and came through a government purchasing > source available to employees. You might also want to try a UPS between > the computer and the line. I have had that help me in a couple of cases. >
Hi Kim, The tower with the original power supply did NOT interfere at all with radios. Somebody else gave me a make and model of a well behaved ATX power supply and I ordered one. I have been making some observations and I have been able to copy weak, QRP operators on 40 meters when the S meter is laying down on zero - no movement at all. I can hear noise from the computer but it's down at that level with the outdoors antenna on the low end of 40. All the way from 7000 to 7080. I swept higher without an increase in (PC) noise. When the new PS gets her I will install it *immediately*. I will continue working with the sinful one to get it cleaned up (followed by it's identical twin). If nothing else I will get some hands-on experience and I'll end with a couple of spare, 500 watt power supplies. It was a pleasure to log onto QRPSpots and post a QRP operator's operations there while looking at my radio dial to give his frequency. I have never been able to do that since I started trying to use this PC for that kind of thing. I'll be looking at 160 tonight with this PC running (knock on wood). Sometimes I can just tell (if I pay close attention) that one of my laptops is on. I don't believe they interfere at all with radios.the noise is *down* in the air noise. 73, Bill KU8H _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK