Fred, It sounds like you may want to check the coax to see if it is OK.
73, Don W3FPR On 9/16/2011 3:45 PM, Fred Jensen wrote: > 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. > ______________________________________________________________ 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
