You might not know it yet, but some LED bulbs are bad RFI devices as well, esp., the cheap ones. My entire office and workshop are LED lighted and I have removed the junk devices. I paid too much for some that are inferior. The US bulbs seem to be the best choice. Not only is the construction better IMO, but I don't see the radiation issues either. PC's and power warts are always on the watch list. I am amazed by the noise output of older HDD. Nasty stuff. I am now using SSD's and the best HDD for storage... still issues with noise on some bands. Shielded power cables have less issues in general, but that is also based on quality. Shielding means nothing unless properly terminated on both ends and the quality of the shielding and termination as well (look at the Coax we use to learn much about shielding... another science in its own right).
73, Bill K9YEQ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Fred Jensen Sent: Thursday, March 07, 2013 6:04 PM To: [email protected] Subject: Re: [Elecraft] P3 - spikes that never move Anthony, Been out of town, didn't see a reply to you when I got home and downloaded 500+ emails. :-) What P3 mode are you using? There is an identified problem with the K3-->P3 IF cable. In Fixed Tune mode [where the ends of the span remain fixed and the VFO cursor moves as you tune], the bad IF cable will put weak signals approximately 14.5 KHz above and below the cursor. They move with the cursor hence you can never tune to them. Signals that slowly move by themselves are almost always external to the K3/P3. Our world is filled with a nearly countable infinity of RF noisemakers these days. CFL light bulbs are notorious and could account for the slow disappearance as they warm up. If your signals disappear when you remove the antenna, that's a pretty good indication that they're external to your radio. 73, Fred K6DGW - Northern California Contest Club - CU in the 2013 Cal QSO Party 5-6 Oct 2013 - www.cqp.org On 3/3/2013 11:08 AM, Anthony Lewis wrote: > I have three spikes on my P3, however they do move - very slowly they will creep along the display. When I have P3 set to maximum span 200kHz, they repeat themselves. > They are there at switch on, but seem to slowly disappear over 10-15 minutes. I have changed IF cable, but that did nothing. > Any ideas? ______________________________________________________________ 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 ______________________________________________________________ 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
