My P3 is new, I'm just getting used to it. Quite suddenly today, the leftmost third of the baseline noise started to rise upward. Tuning doesn't change it, it's still the leftmost 1/3. Happens at any span setting, and rises about half way up the scale. It's sort of variable, jumping up and down a bit and has the band noise on it just like it normal if it was straight across the bottom.
I discovered that putting my hand on the top of the P3 anchored it back to the bottom. A clip lead from the IF Out BNC outer shell to the station ground also anchored it solidly down. The antenna coupler, power supply, K3, and KPA500 are all grounded to the single copper strap on the back of the shelf which is connected to a UFER ground directly under the shack, and to the utility safety ground ["green wire"] There is no ground lug on the P3. I would have thought the coax IF connection would have grounded the P3 chassis to the K3. I'm wondering if I've got some grounding problem in the P3. It has worked fine since I built it and first turned it on and this is the first time I've seen this anomaly. 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org anomaly [n. ahh-NAHM-ahh-lee] A term used by NASA to describe any unexpected or unplanned event or system state, regardless of severity. It can range from a burned out indicator on a panel to the rocket landing pointy-end down outside of Tucson. ______________________________________________________________ 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
