Hi Neal, Thanks for the suggestions. I tried changing the refresh rate, resolution, etc but to no avail. The noise continues even after removing the monitor cable from the video board. I would guess this pretty much eliminates the video end of things. What can I do re the pwr supply other than toroids on the 120V input ?
Thanks, Art ________________________________ From: Neal Campbell <nealk...@gmail.com> To: w8...@yahoo.com Cc: flexradio@flex-radio.biz Sent: Tuesday, December 30, 2008 1:48:32 PM Subject: Re: [Flexradio] New Computer= noise Merry Christmas Art! The two areas I would concentrate on are the video hookup and the power supply. How many toroids do you have on the cable going from the video card to the monitor? Try changing the refresh frequency on your display and see if the behavior changes. You can do this by right-clicking on the desktop, then click on the right-most tab and click the button called advanced. Under the monitor tab, you can usually change the refresh freq. If there is a box there that says "show only frequencies supported by the monitor" leave it checked initially. If it doesn't show you any options with the boxed checked, uncheck it. You will usually see 60z, 70hz and one inbetween (64.5 maybe?) Just see if it changes anything. If it does you have the right area. It may not be the solution but at least you know where the problem is. If its there, try changing to a better shielded/toroided cable. If its not the video card, I would make sure you have ground the heck out of the computer case to the same ground as the radio. Just as we were always suspicious of switching power supplies for our rig, computers have always used them in the modern age and cheap computer power supplies are a gift from hell. I haven't ever used a compucase case before so cannot testify abt their power supplies but a good grounding and toroids on any piece of wire connected to it should help mightily. BTW, most of those snapon toroids are worthless. The only ones I can recommend are the big knuckle buster ones from DX Engineering. Otherwise you are much better off getting some big donut ones. 73 es I am sure you will figure this out! Neal k3nc Neal Campbell Abroham Neal Software Programming Services for Windows, OS X and Linux (540) 242 0911 --------------------------------------------------------------------- Try Spot for OS X, the intelligent DXCluster Client at www.abrohamnealsoftware.com - $15.99 ------------------------------------------------- For a great dog book, visit www.abrohamneal.com ------------------------------------------------- See the FlexRadio Systems Flex-5000a in action at www.flex-videos.com On Tue, Dec 30, 2008 at 1:09 PM, <w8...@yahoo.com> wrote: > Help please! > > Santa brought me the pieces parts for a new computer and I have successfully > assembled it, Flex 5000A runs great on it at 10 to 15% CPU useage @192 range > But: horrific noise peaks at 100 khz intervals, This is most pronounced on > the 80 meter band. There are minor peaks at 50 khz intervals. The overall > noise floor is also higher. > > Pieces Parts as follows: > Case&Pwr Supply--Compucase 6AR6BS2fxFX585 > Motherboard -------Gigabyte GA-EP45-UD3P P45 775R > Video Board --------Gigabyte N95TOC1GH 9500GT R > CPU-----------------Intel E 8400 3G 775 45N R > Memory------------- 2Gx2/CORS > Harddrive------------WD 2500AAKS > DVD-----------------Samsung/SH223 > > Have tried turning the monitor off. The only thing that helps the noise is to > turn the computer completely off. Removing the antenna from 5000A seems to > eliminate it on the panadapter as well as audibly. When I turn the 5K off the > noise is still present on a separate rig. > > Any suggestions would be appreciated. > > 73, Art K8JK > > > > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flex-radio.com/ Homepage: > http://www.flex-radio.com/ > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
