Fred. Check the coax between the K3 and the P3. I think you will find the problem solution there.
73, Don W3FPR On 9/22/2011 8:09 PM, Fred Jensen wrote: > I thought I had this figured out and solved. That I have not solved it > does not surprise me, I'm fairly old and this *has* occurred once or > twice before. > > Every now and then, generally more "then" than "now," the baseline on my > P3 sort of wanders upwards. Sometimes it's on the left, sometimes it is > on the right, sometimes [not so often], it's the entire baseline. It > goes up maybe 1/3 of the screen [I usually have the waterfall turned > off, I can't see it, long story], and it moves around vertically, not > fast, but not slow either [being a retired engineer, I like to be precise]. > > The band noise and signals seem to ignore this, they just appear on the > elevated baseline as if they didn't know, which I suspect they don't. > If, when this is happening, I place my hand on the top of the P3, the > baseline returns to where it should be and stays there like a chastised > 4 year old, with about the same attention span. > > I have grounded the P3 to my single point ground [a wide copper strap > along the back of the shelf and "grounded" straight down to the ground], > I've moved the rig power supply [FT-1030A] away, and I've shut the > KPA500 [about 10 inches underneath] off with no change. > > I actually don't mind putting my hand on it to fix it, I've banged > radios and moved stuff in magic ways for 50+ years to solve problems, > but I'm just curious. My P3 is powered from the K3. Has anyone else > seen this? I haven't yet tried "hand on side of P3," tonight if the > baseline wanders. > > ______________________________________________________________ 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
