All: The noise that appeared this evening at 7:00pm may have something to do with AC power coming into the house. I noticed that the noise changed when I turned the shack light on and off. This video
This has the potential stink of one or more wiring errors INSIDE your home. Look for all the simple dumb mistakes -- outlets wired with phase (hot) and neutral reversed, or with ground (green) and ne
For a long time I had a similar puzzling noise on 20m that shifted in frequency when the central air conditioning unit came on/off. As I'm on that band only for contests with a low fan-dipole antenna
Patrick, That certainly is bad news about the open ground on an AC outlet. However, the "tingle" you get with 2-prong, non-polarized plug devices in metal housings has nothing to do with the AC wirin
Have you tried killing the main breaker to your property? That could help rule out things on your end. There are "ghost" currents from things running while "off", a lot of household electronics to th
Hi Tony, If I may, I'd like to suggest that what you need to do is track down the source of the noise rather than trying to speculate on what it is. The actual source of the noise may end up being fr
All: Thanks for all the great advice. A local offered to stop by and lend me his battery powered FT-817 to sniff out the noise. The plan is cut the power and turn on each breaker one by one. That sho
Tony, It could be anything. I myself a few years ago had a random sporadic noise, a crackling and very strong especially on the lower bands, 80 meters. One day I had the receiver volume turned up so
This has the potential stink of one or more wiring errors INSIDE your home. Jim... I setup the computer to monitor the noise 24 hours a day. It's been a few days now and it's only come on at night be
Hello Tony: Could your noise problem be related to a dusk to dawn light at your home or a street light? Or a neighbors outdoor light (only on when it is dark)? 73, Tim K3LR Jim... I setup the compute
On 9/13/2012 9:56 PM, Tim Duffy K3LR wrote: Hello Tony:Could your noise problem be related to a dusk to dawn light at your home or a street light? Or a neighbors outdoor light (only on when it is dar
Most likely the reason the noise changes when you switch your light on is there is a small line voltage drop. This would cause a free running oscillator such as used in switching power supplies to sh
I suspect a combination of things -- a wiring problem that is making the noise source radiate (or conduct) more effectively. The thing that makes me suspect house wiring is that you said you switch a
I notice a similar peaking or reducing effect when I turn on the OUTSIDE lights while using some (SCR controlled, switcher powered) track lighting. This is due to changing the length of connected wir
On 9/13/2012 11:52 PM, Jim Brown wrote: On 9/13/2012 5:19 PM, Tony wrote: Assuming it is a house wiring problem and not an appliance, what would cause it to come on in the evening and stay on till mo
This may be in the category of "you should never say never, when it comes to RFI". Back in the 80s, when I lived in a townhouse, I was focusing on 80 meters to finish 5BDXCC. I became aware of local
Back about 23 years ago, when we still lived in the 'burbs, a neighbour three houses away from me complained that I got into her telephone. This only occurred on those times when I operated 10-meters
But the frequency selectivity was interesting. Of course, we civilians didn't have wideband receivers in those days, or means of visualizing signals over a frequency domain, but this was nothing like
Why do you use the word "incredibly" to describe simple antenna action? No amount of handset bypassing / filtering ever eliminated the RFI in the cord's uncoiled state This might have succumbed to a
Hi Jim, In answer to your first query re. my use of the word "incredibly", well, to ME at least, it truly was: we'd all spent the better part of the evening attempting to solve this neighbour's telep