Hi, I have been limping along with a really ugly replacement power supply in my big computer. It's networked (think of internet tools). I could hear *nothing* on my radios aside from the racket made by that power supply. I even found my power supply listed on the internet as an example of *ugly*. There is no EMI filter at all - just two jumpers where the filter is supposed to be. The computer had to be turned off to even think of using a radio.
I have paid for a new, better quality power supply (only $2 more) and the online tracker suggests it will be in my mailbox any minute..maybe tomorrow. I got impatient. I have two of those ugly supplies so I took the filter parts out of one of the dead ones and installed them in this one. I put the supply in the computer and it made quite a difference! It's not good enough yet but I am listening to hams on 40 meters while I am typing this! I couldn't do that before. Next I'll be getting my hands on some ferrite core materials and looking to see just how far I can reduce the noise. I have two laptop computers here, older and newer, and I can barely tell when I turn either of them on. Neither one talks to my network at the moment so I will have to correct that. But I have a "target" noise performance for my PC tower, now. Meanwhile I have the noise knocked down well enough to try using this computer to help with operations while on the air. I may be unable to hear the weakest signals but I'll see how that goes. 73, Bill KU8H _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
