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#1
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Background: Within the past several months my QTH which was virtually a
very low noise environment now is one of the nosiest QTH's I have ever lived in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with birdies every 5-7-kc. These are not low signal strengths either but up to a S-9+ on 80 meters. have check with all of my neighbors since initially it would start right at 5 PM and last all night until 7:30 in the morning. My first thought was an auto light fixture. Well it's gotten bad and doesn't seem to be on a regular time schedule. Feelings are TV or touch lamp. Possible PC but don't know. Power company is Florida Progress which is a Duke Energy company. Have heard that Duke is playing with their new Internet access over power lines but I do not think it has hit the central Florida market. Question - I am thinking about trying the MFJ-1265 Noise phasing unit. Have read an old review on ARRL and other comments on some bulletin boards but am wondering if anyone out there has experience with the unit and what their honest impression is. In addition to that unit I plan on a complete rework of the antenna and grounding system her just to make sure I do not have a poor joint in the system that is providing some rectification and being self induced. Any comments will be appreciated. Again thanks to the list for accepting this inquiry, I respect the expertise of the this group. Ron - W4LDE |
#2
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Ron, before you go nuts with fixes & mods, do a little noise-sniffing. Take
a 2M H/T, and a portable AM radio out around the neighborhood, and see if you can find any potential sources for the noise. Bear in mind too, that the noise doesn't have to be locally produced. It is theoretically possible (and has happened more than once) for the noise source to actually be several miles away, but part of the same grid. One of our local hams had a problem several years ago, and the source was a touch lamp, 1.5 miles away... And don't be afraid to ask Duke to help you in searching out the noise source - if it's theirs, they are obliged to find & fix it. 73, Mike KI6PR El Rancho R.F., CA "Ronald Walters" wrote Background: Within the past several months my QTH which was virtually a very low noise environment now is one of the nosiest QTH's I have ever lived in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with birdies every 5-7-kc. These are not low signal strengths either but up to a S-9+ on 80 meters. have check with all of my neighbors since initially it would start right at 5 PM and last all night until 7:30 in the morning. My first thought was an auto light fixture. Well it's gotten bad and doesn't seem to be on a regular time schedule. Feelings are TV or touch lamp. Possible PC but don't know. Power company is Florida Progress which is a Duke Energy company. Have heard that Duke is playing with their new Internet access over power lines but I do not think it has hit the central Florida market. Question - I am thinking about trying the MFJ-1265 Noise phasing unit. Have read an old review on ARRL and other comments on some bulletin boards but am wondering if anyone out there has experience with the unit and what their honest impression is. In addition to that unit I plan on a complete rework of the antenna and grounding system her just to make sure I do not have a poor joint in the system that is providing some rectification and being self induced. Any comments will be appreciated. Again thanks to the list for accepting this inquiry, I respect the expertise of the this group. Ron - W4LDE |
#3
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Before spending money on a phasing unit, run a few of the following checks.
1. Remove antenna - check for birdies. If they are still there start looking at the receiver. 2. If no birdies, assuming rig can run on 12 Volts, remove power supply and substitute a battery. Reconnect antenna. Check for birdies. 3. If birdies, throw house master breaker and see if they go away. If they do as I suspect they will turn breaker back on and turn off breakers one at a time untill you find out it is a clock radio or some other electronic device. 4. If they still persist, start driving around the neighborhood looking for increased signal strength. Had a similar problem one time, turned out to be an old radio in the attic. My wife had been up there sorting boxes and plugged in an old radio to listen to. She had turned it down, but not off and it was creating havoc. You did not mention the rig your using , that would be helpful. "Ronald Walters" wrote in message . com... Background: Within the past several months my QTH which was virtually a very low noise environment now is one of the nosiest QTH's I have ever lived in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with birdies every 5-7-kc. These are not low signal strengths either but up to a S-9+ on 80 meters. have check with all of my neighbors since initially it would start right at 5 PM and last all night until 7:30 in the morning. My first thought was an auto light fixture. Well it's gotten bad and doesn't seem to be on a regular time schedule. Feelings are TV or touch lamp. Possible PC but don't know. Power company is Florida Progress which is a Duke Energy company. Have heard that Duke is playing with their new Internet access over power lines but I do not think it has hit the central Florida market. Question - I am thinking about trying the MFJ-1265 Noise phasing unit. Have read an old review on ARRL and other comments on some bulletin boards but am wondering if anyone out there has experience with the unit and what their honest impression is. In addition to that unit I plan on a complete rework of the antenna and grounding system her just to make sure I do not have a poor joint in the system that is providing some rectification and being self induced. Any comments will be appreciated. Again thanks to the list for accepting this inquiry, I respect the expertise of the this group. Ron - W4LDE |
#4
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Some very good suggestions. I will add that birdies at this spacing can
also suggest things like switching power supplies. Many things have them now. If A portable receiver to hear them can go a long way. -- Steve N, K,9;d, c. i My email has no u's. "W4JLE" w4jle(remove to wrote in message ... Before spending money on a phasing unit, run a few of the following checks. 1. Remove antenna - check for birdies. If they are still there start looking at the receiver. 2. If no birdies, assuming rig can run on 12 Volts, remove power supply and substitute a battery. Reconnect antenna. Check for birdies. 3. If birdies, throw house master breaker and see if they go away. If they do as I suspect they will turn breaker back on and turn off breakers one at a time untill you find out it is a clock radio or some other electronic device. 4. If they still persist, start driving around the neighborhood looking for increased signal strength. Had a similar problem one time, turned out to be an old radio in the attic. My wife had been up there sorting boxes and plugged in an old radio to listen to. She had turned it down, but not off and it was creating havoc. You did not mention the rig your using , that would be helpful. "Ronald Walters" wrote in message . com... Background: Within the past several months my QTH which was virtually a very low noise environment now is one of the nosiest QTH's I have ever lived in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with birdies every 5-7-kc. These are not low signal strengths either but up to a S-9+ on 80 meters. have check with all of my neighbors since initially it would start right at 5 PM and last all night until 7:30 in the morning. My first thought was an auto light fixture. Well it's gotten bad and doesn't seem to be on a regular time schedule. Feelings are TV or touch lamp. Possible PC but don't know. Power company is Florida Progress which is a Duke Energy company. Have heard that Duke is playing with their new Internet access over power lines but I do not think it has hit the central Florida market. Question - I am thinking about trying the MFJ-1265 Noise phasing unit. Have read an old review on ARRL and other comments on some bulletin boards but am wondering if anyone out there has experience with the unit and what their honest impression is. In addition to that unit I plan on a complete rework of the antenna and grounding system her just to make sure I do not have a poor joint in the system that is providing some rectification and being self induced. Any comments will be appreciated. Again thanks to the list for accepting this inquiry, I respect the expertise of the this group. Ron - W4LDE |
#5
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Did anybody close by get a new plasma TV. 17 KHz is way to low for a
switching power supply, and slightly high for NTSC TV, but could be some kind of ED TV or computer monitor. Tam/WB2TT " |
#6
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![]() "Ronald Walters" wrote in message . com... Background: Within the past several months my QTH which was virtually a very low noise environment now is one of the nosiest QTH's I have ever lived in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with birdies every 5-7-kc. These are not low signal strengths either but up to a S-9+ on 80 meters. have check with all of my neighbors since initially it would start right at 5 PM and last all night until 7:30 in the morning. My first thought was an auto light fixture. Well it's gotten bad and doesn't seem to be on a regular time schedule. Feelings are TV or touch lamp. Possible PC but don't know. Power company is Florida Progress which is a Duke Energy company. Have heard that Duke is playing with their new Internet access over power lines but I do not think it has hit the central Florida market. Question - I am thinking about trying the MFJ-1265 Noise phasing unit. Have read an old review on ARRL and other comments on some bulletin boards but am wondering if anyone out there has experience with the unit and what their honest impression is. In addition to that unit I plan on a complete rework of the antenna and grounding system her just to make sure I do not have a poor joint in the system that is providing some rectification and being self induced. Any comments will be appreciated. Again thanks to the list for accepting this inquiry, I respect the expertise of the this group. Ron - W4LDE Ron, I have been experiencing almost the same problems. I run a TS850 and loop/SGC239 combo on this end. I went through all the troubleshooting routes to find the source of my noise. All my radio gear is on a 12V battery system with charger so I know it is not coming through the AC lines. If I remove the antenna the noise disappears. It ended up being a combination of two sources, the highspeed cable modem hooked up to the computer upstairs in the living room, and the switching supply in my living room TV. Unplugging both devices completely eliminates all noise on the rig. I even went as far as to line both the modem case and inside of the TV with aluminum tape. Helped a little bit but the noise was still S9+ on 160 and 80. Even put an AC line filter on the TV just in case. In desperation I tried the MFJ 1026 noise canceller. With a pickup antenna running on the basement ceiling under the TV, I am able to null the noise from S9 to about S2 or S3. I am hearing PSK signals on 20m I couldn't hear before. Not the ideal solution, but it does allow me to enjoy HF again. I would try and borrow one first to see if it will work in your situation. Good luck, Max |
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