Ed: I wonder if you might be so kind as to e-mail your research on RFI in your HVAC system. Please send to coastal...@coastalnow.net (no file size limit).
It too have done a lot of searching in my home for sources of noise. First by running my radio from a battery and tripping the main circuit breaker to see what noise goes away. Then, going down the line of each individual breaker until I located the source -- assuming it is inside the house. I work for an electric utility company and have been able to help resolve a number of complaints of powerline interference -- mostly in my own neighborhood. Generally, those powerline problems have been caused by blown lightning arrestors where the expulsion cartridge has not completely blown the stinger off the bottom of the arrestor. I found three in my neighborhood like that. We were glad to get them replaced but may not have know about them unless someone (like a ham operator) had complained of noise. For years our line crews could only have AM radios installed in their service trucks because that helped them to become more aware of powerline noise as they drove throughout the system. Now, of course, you can't buy a truck with just an AM radio. J. Mark Bolton KA4CID Richmond Hill, GA Visit my blog at www.KA4CID.blogspot.com -----Original Message----- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of Ed Sieb Sent: Friday, March 26, 2010 7:19 PM To: w...@brightok.net Cc: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] More Hash and Buzzies Jim, I have all the dope on mitigating RFI out of HVAC, gas furnaces, etc, etc. I have a Trane XV95 gas furnace which spews trash out on HF. I successfully mitigated that noise. Let me know if you can handle 8Mb of down loads and I will send you my entire package. Ed, VA3ES --------------------------------------------------------------------- Jim/W5JO wrote: I encountered the same situation with the FCC over the air handler unit to my HVAC, it is a multi speed motor that is controlled by a PWM signal. The noise it puts out is nothing like this thing though but I followed up with the manufacturer and they would not, (first) admit the problem with in their unit, and (second) would not provide any help other than telling me to buy a filter from Radio Shack. ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
