My neighbor's LG refrigerator is radiating RFI on 28MHz and Don (WD8DSB) temporarily hooked up a Corcom filter and a cord wrapped around a #31 torroid core that eliminated the interference. I tried c
We had a problem with a new Kitch Aid frig. RFI throughout HF to 14 MHz. A hefty common mode choke "mostly" fixed the problem. Remember, home appliances are specifically excluded from any obligation
I'd bet that the turns around the toroid were doing all the work. Noise is most often on the green wire, which is a chassis-to=chassis connection on the filter. 73, Jim K9YC _________________________
Is putting the Corcom at the end of the cord where it plugs into the mains adequate or does it need to be wired in at the fridge entry? 73, Dan _______________________________________________ RFI mai
That is one very nice looking EMI Filter. I 100% agree with W9RE Mike. If someone made a nice package EMI + Common Mode in a nice package I would buy a few to pass out to some of my neighbors. It sho
Hi Jim, Once again the toroid core choke did not eliminate the RFI on its own. We tried the K9YC toroid choke by itself and it did not eliminate the RFI, we tried the corcom filter by itself and it d
Hi Dave, All appliances still come under FCC requirements of not causing harmful interference even if they fall under the unintentional radiator category and even on the unintentional radiator exempt
I did not watch the video, so please excuse me if the answer is there. Is the choke on the refer side of the corcom or the mains connection side? 73, Dan _____________________________________________
Hi Dan, We had to use the corcom filter along with toroid core choke based on Jims (K9YC) design on the power cord. Both filters were laying out in the open, and not right at the fridge or wall outle
Hi Dan, I tested the toroid core choke between the fridge and the corcom and also between the corcom and wall outlet and both locations worked great in the elimination of the RFI at Mikes QTH. Don wd
Thanks. I was thinking it's good to have shunt paths to ground, like the Corcom will have, to add to the effectiveness of the choke. 73, Dan _______________________________________________ RFI mailin
Thanks Don. How is the Corcom installed? For it to work well, it needs a VERY short bond to the chassis of the fridge. I would put the choke on the line side of the filter. On what bands was there no
A very common cause of RFI from most equipment is failure of the Green Wire to make proper contact with the chassis where it leaves the equipment. It's the power line equivalent of the Pin One Proble
I concur that in some situations both a normal-mode filter (e.g. Corcom) and a common-mode choke are required. Mitigating a big Tripp-Lite UPS was like that. I carefully tested each approach and it w
Hi Jim, For the records, we actually tried two different commercial filters on the fridge along with the common mode choke. Both required the common mode choke in line with it to successfully elimina
Hi Jim, I forgot to answer your question about what bands the RFI was on. Mike was only experiencing noise on 10 meters, so I did not look at other bands. Because we were dealing with 10 meters I als
Hi Jim, Looking at your published plots, it looks like there would not be much difference on 10 meters between #43 and #31 material for the common mode choke. Do you agree? Don (wd8dsb) _____________
Looking at your published plots, it looks like there would not be much difference on 10 meters between #43 and #31 material for the common mode choke. Do you agree? No. I would stick with #31, and u
Hi Jim, Totally agree about the ideal location for the corcom filter from a text book point of view but we have a solution that eliminates the RFI on 30 MHz at Mikes without having to mount the comme
Here is a quick followup regarding the RFI at W9RE on 10 meters that we tracked down to his neighbors refrigerator a few weeks ago. We previously were able to eliminate the RFI using a commercial pow