Are you talking about a CFL, or a conventional fluorescent lamp? Many newer fluorescent lamps come with an electronic ballast. These are sometimes a problem, in that the "ballast" operates like a switching power supply, and if not designed or built properly, can emit copious amounts of noise. A standard "old fashioned" magnetic ballast does not have this problem. If your lamp uses the newer electronic ballast, replacing the ballast with a magnetic type will fix the problem.
BTW, I have used many many CFLs and never had even the slightest bit of RFI from any current production units. There was a small amount of noise from some of the very early units of 20 years ago. The last one of those I had was retired circa 1995. Most of the CFLs I have now are from Costco, and are FEIT brand, made in China. Nary a peep from them. We have about 35 CFLs in service now, and the 80-meter noise level is about S2 on a bad day, closer to S1 normally. (I live in a rural subdivision with underground power). 160 meter noise is about S3 to S4, and S0 for 40 meters and higher. - Jim KL7CC In my shack, where a fluorescent lamp is located only four feet from the rig, I recently switched from a 40 meter coax-fed dipole to a random wire with counterpoise directly into the K3, no coax. Lots of noise. Turn the switch off, noise goes away. Not a problem with coax-fed dipole. --Andrew, NV1B ______________________________________________________________ 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
