Hi Roger, I had something similar with my P3. After cleaning the internal metal to metal contact points on the case, my problem disappeared. Good bonding (and tight screws) on all enclosure panels is essential.
I also had another problem with wandering "spikes" on the display. It turns out my BNC lead was faulty. Andy VK4KY -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-Double-humped-Noise-Monster-tp7577749p7577754.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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