> My station consists of a KX3 / PX3 connected via 100 ft of DX Engineering > RG-8/U Low-Loss coax through an Alpha Delta antenna switch to a Balun > Solutions 4:1 Unun tied to a 31 ft vertical antenna. The antenna and unun are > grounded via a copper rod driven 3 feet into sandy soil in South Florida. The > entire station is grounded to the ground system of my house by a single > copper ground wire which is about 7 ft long. Each piece of station gear > (including the antenna switch) is separately grounded to a 2 foot copper pipe > tied to that ground. I run the station off a 12v 3Ah Bionenno LiPO battery. > > My question concerns a visual signal artifact of about 5-7dB strength that > appears on my PX3, just off the frequency to which I am tuned. The artifact > has 2 peaks when viewed at higher resolution. The artifact (which has no > audio component) appears to be closely associated with a new > Elecraft-provided USB cable connecting my HP Pavillion PC to my PX3. Once the > USB cable is disconnected from the PC, the artifact disappears from the PX3 > display. As soon as the cable is reconnected, the artifact reappears.The > artifact appears regardless of other signals being present. > > I recently purchased and installed a range of Palomar Engineers ferrite > snap-ons (>>Mix 31<<) which failed to mitigate this artifact. I coiled as > much of the USB cable as possible then clipped on the ferrite beads. This had > no effect. I placed additional ferrite beads on other wires and cables > associated with my station, but observed no impact on the artifact. > > I am wondering whether I may need a different mix ferrite. Based on what I > have shared here, do other solutions present themselves?
> Thanks for sharing any insights or suggestions. > > Jim - N7RCS ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
