Thanks, David (and others). The noise does move in frequency as can be seen in the waterfall so it's some sloppy source.
The 1500 is powered by a linear supply but there are many switching supplies in my lab. I suspected that but trying them all is gonna involve a lot of unplugging, checking, replugging and then trying get whatever was power cycled back in working order again :>( I'll try first to find it with my little Kenwood handheld hf rx (thf6). Richard W5SXD "David R. Wilson" <[email protected]> wrote: (07/22/2010 12:00) >Hello Richard, > >Might be worth a look around to see if there is a switching power supply >that is creating that. > >Most of the time when I have heard signals from computer hardware there >is at least a tone or well defined sound and a pickup loop and some >snooping will find the source. > >Just a thought. > >Dave > >KU4B > > >On Thu, 2010-07-22 at 10:53 -0500, richard allen wrote: >> Does anyone recognise this type of noise? >> >> http://www.rcallen.com/noise14.gif >> >> I figured I'd ask before starting to unplug everything as I have all sorts >> of possibilities in my lab. I still hear it with a dummy load on the >> antenna of my 1500 but not as strong. >> >> Richard W5SXD >> >> >> >> _______________________________________________ >> Flexedge mailing list >> [email protected] >> http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz >> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used >> for posting topics related to SDR software development and experimentalist >> who are using beta versions of the software. _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
