Here's a website forwarded to me by a friend. Visit it and click on a noise type and then on a specific file. It will let you hear the noise that the various sources make. Don, K4KYV http://ve3hls.tr
Mine generates a lot of rubbish up around 2400 kHz, above 160 and just below WWV. Sounds like a buzzsaw. Doesn't seem to get into any of the ham bands. Don K4KYV ____________________________________
I have noticed the same with touch switches and touch lamps. I checked out the ones for sale in our local Lowe's and not a single one carried the Part 15 label. _____________________________________
Click on the link, or copy and paste into your browser, to listen to the story via streaming audio. They finish the story with a short rebuttal by ARRL's Ed Hare. http://www.npr.org/templates/story/s
It can also be pointed out that BPL and other digital rubbish such as IBOC and DRM could effectively jam interception of unwelcomed news, information and political opinion, much more effectively than
A few months ago there was a story circulating of the development of a non-polluting BPL system that uses microwave frequencies instead of HF/VHF. It used the power lines to act as sort of a wave gu
It's accessible from the archives of ME, starting at 1 minute 11 seconds into the cut. http://www.npr.org/templates/story/story.php?storyId=4804900 Don K4KYV ________________________________________
I have it here, starting on 80m and all the way through 10m. It gets stronger the higher I go in frequency, and covers the whole hf spectrum. Turning off the cable modem kills it entirely. Don K4KYV
I replaced an incandescent one with a srew-in compact fluorescent lamp in the shack a couple of years ago. It stayed in place about 30 min. before I pulled it out and put back in a regular bulb. Pret
Either throw the touch lamp in the trash, or rip out the touch circuitry and replace it with a mechanical switch. Those thing generate an incredible amount of garbage throughout the HF spectrum. I w
I bought a $30 Radio Shack VHF aircraft radio receiver for the purpose. It is AM, not FM, and works very well. I can track noise down to the exact pole. But the problem I have is travelling along th
The hostages crashed the plane into the ground? The theory I have heard is that the suicide hijackers crashed the plane once they realised their original mission wouldn't succeed. I understand that,
You guys still have TV repair shops up there? I haven't seen one of those in years. Nowadays everybody just assumes a TV set is a throw-away item. When TV's quit using tubes, most of the repair shop
Mine is an APC unit. It generates a broad buzzsaw-sounding signal just below the 2.5 mHz WWV, but doesn't bother 160 or 75, or even WWV. On the other hand, my cable modem trashes the entire HF spectr
The problem is that would eliminate just about this entire region. I don't think there is a spot in this county that isn't within 5 miles of one of those lines. I have one on the back side of the pr
I have experienced the same thing with conventional incandescent pilot lamps. Running them on DC seems to lead to a very short life. Someone once explained the reason, but I forget why. It is some k
I think you are hearing the wires vibrating in a gentle breeze, somewhat like a violin string. I have noticed the same thing with telephone and electric power poles too. But I also notice it with my
Has anyone tried one of the miniature handheld receivers, like the Yaesu VR-500 or Icom IC-R series? Seems like it would be a good receiver for casual listening and rf noise sniffing purposes. Lookin
I live in the country with no traffic lights nearby, so this isn't a problem with me, but I keep hearing about RFI generated by the new l.e.d. traffic signals. Apparently, the noise is due to a switc
Here is another article on the topic. http://www.wired.com/wired/archive/12.02/quiet.html Check out this discussion thread on the topic: http://amfone.net/Amforum/index.php/topic,18094.msg125884.html