Hello All, Since this is OT - I had a project in the 'shack' and I measured 48MHz and 480MHz on a spectrum analyzer and I didn't know where it was coming from. The project had a USB port that was unused - and that is where the noise was coming from. USB devices, if 'uncontrolled' - can create a lot of noise and issues when they are in close proximity to radio equipment.
73's, John AJ6BC On Wed, Nov 6, 2013 at 4:57 PM, Joel Black <[email protected]> wrote: > I had a couple of suggestions. Thanks for the input. > > 73, > Joel - W4JBB > > > On 11/5/13, 5:09 PM, Joel Black wrote: > >> I have been plagued with noise spikes that show up on my P3 on certain >> frequencies and have narrowed it down to a Belkin F4U017 USB hub. The >> problem is that my iMac only has four USB ports. >> >> It is definitely the hub and not the wall-wart power supply. >> >> Does anyone use an inexpensive hub with their iMacs that does not >> generate any noise? >> >> 73, >> Joel - W4JBB >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
