Re: [digitalradio] Re: Odd noise in receiver
Ah, I wish it was that simple! It's been back for several days now and runs its' cycle non-stop. The only good thing about it is that it's every 30 Khz and not every 10! For the most part it stays away from my PSK and CW frequencies and I can work around it somewhat. Thanks, Jose es 73 Dave KB3MOW Jose A. Amador wrote: It might be a switching PSU on standby mode. I know one TV set that cycles in a similar way (producing some 'reverse TVI), even when the numbers are not the same, it starts, charges the main capacitor, goes into standby and restarts when its voltage diminishes under a certain threshold. 73, Jose, CO2JA Dave 'Doc' Corio wrote: Thanks for the info, Bruce. I didn't have a chance to record it or measure it accurately before it disappeared Friday evening some time. As to if it's time synced, I would have to guess that it is. It was extremely close to 10 seconds on and 5 seconds off, and the number of pulses was 55 during the on period. Granted, timing it with a stopwatch is not exactly precise, but it was close enough that I'm reasonably certain it's timed somehow. The simple fact that it stopped Friday night leads me to believe it's some type of commercial activity. I've had the rig on a lot this weekend, and haven't heard it once. It also stopped before I could log exactly where it was. If I'm lucky, it's gone, never to return. I doubt it, however. If it comes back, I'll get a recording of it and post it. If you have a recording of yours, please send it to me! May not help, but it sure couldn't hurt! Tnx es 73 Dave KB3MOW Bruce Sawtelle wrote: Hi Dave, I have a similar type noise in our neighborhood. By doing some DF'ing, we've pinned it down to a neighbor's house, but haven't been successful yet in gaining their confidence to let us explore beyond their front door. Can here it on VHF when we're at their front porch. Is it time synced, i.e. is the accuracy such that it's being derived from a 60Hz/Xtal time base. In my case, it's not. It comes on for APPROX 12 seconds and goes off for APPROX 3 seconds, but if I listen to it over a few minutes, it will drift up or down. Also, I noticed I can hear it at ~ 16.7KHz offsets, which makes me think it could be PC video related. Not sure if it could be switching power supply related, I thought most of them were 100's Khz. Actually, It had been across the full 20M band last year when we were DF'ing, but now it's discrete. I have a wav file I can send you if that would help. Fortunately, it's been down to S2-3 as of late. It also seems to be tied to colder weather (thermostat control??). BTW, the neighbor is 300-400 feet away in a suburban area (70' x 120' lots) . W5AHC is another ham in the neighborhood and he's ~100 fett closer and hears it as well. Hope this helps. Let me know what it ends up being. tnx es 73 Bruce - W3NJ
Re: [digitalradio] Re: Odd noise in receiver
It might be a switching PSU on standby mode. I know one TV set that cycles in a similar way (producing some 'reverse TVI), even when the numbers are not the same, it starts, charges the main capacitor, goes into standby and restarts when its voltage diminishes under a certain threshold. 73, Jose, CO2JA Dave 'Doc' Corio wrote: Thanks for the info, Bruce. I didn't have a chance to record it or measure it accurately before it disappeared Friday evening some time. As to if it's time synced, I would have to guess that it is. It was extremely close to 10 seconds on and 5 seconds off, and the number of pulses was 55 during the on period. Granted, timing it with a stopwatch is not exactly precise, but it was close enough that I'm reasonably certain it's timed somehow. The simple fact that it stopped Friday night leads me to believe it's some type of commercial activity. I've had the rig on a lot this weekend, and haven't heard it once. It also stopped before I could log exactly where it was. If I'm lucky, it's gone, never to return. I doubt it, however. If it comes back, I'll get a recording of it and post it. If you have a recording of yours, please send it to me! May not help, but it sure couldn't hurt! Tnx es 73 Dave KB3MOW Bruce Sawtelle wrote: Hi Dave, I have a similar type noise in our neighborhood. By doing some DF'ing, we've pinned it down to a neighbor's house, but haven't been successful yet in gaining their confidence to let us explore beyond their front door. Can here it on VHF when we're at their front porch. Is it time synced, i.e. is the accuracy such that it's being derived from a 60Hz/Xtal time base. In my case, it's not. It comes on for APPROX 12 seconds and goes off for APPROX 3 seconds, but if I listen to it over a few minutes, it will drift up or down. Also, I noticed I can hear it at ~ 16.7KHz offsets, which makes me think it could be PC video related. Not sure if it could be switching power supply related, I thought most of them were 100's Khz. Actually, It had been across the full 20M band last year when we were DF'ing, but now it's discrete. I have a wav file I can send you if that would help. Fortunately, it's been down to S2-3 as of late. It also seems to be tied to colder weather (thermostat control??). BTW, the neighbor is 300-400 feet away in a suburban area (70' x 120' lots) . W5AHC is another ham in the neighborhood and he's ~100 fett closer and hears it as well. Hope this helps. Let me know what it ends up being. tnx es 73 Bruce - W3NJ
[digitalradio] Re: Odd noise in receiver
Hi Dave, I have a similar type noise in our neighborhood. By doing some DF'ing, we've pinned it down to a neighbor's house, but haven't been successful yet in gaining their confidence to let us explore beyond their front door. Can here it on VHF when we're at their front porch. Is it time synced, i.e. is the accuracy such that it's being derived from a 60Hz/Xtal time base. In my case, it's not. It comes on for APPROX 12 seconds and goes off for APPROX 3 seconds, but if I listen to it over a few minutes, it will drift up or down. Also, I noticed I can hear it at ~ 16.7KHz offsets, which makes me think it could be PC video related. Not sure if it could be switching power supply related, I thought most of them were 100's Khz. Actually, It had been across the full 20M band last year when we were DF'ing, but now it's discrete. I have a wav file I can send you if that would help. Fortunately, it's been down to S2-3 as of late. It also seems to be tied to colder weather (thermostat control??). BTW, the neighbor is 300-400 feet away in a suburban area (70' x 120' lots) . W5AHC is another ham in the neighborhood and he's ~100 fett closer and hears it as well. Hope this helps. Let me know what it ends up being. tnx es 73 Bruce - W3NJ --- In digitalradio@yahoogroups.com, Dave 'Doc' Corio [EMAIL PROTECTED] wrote: Wonder if anyone has encountered this type of noise. It's a raspy, pulsating sound. It lasts 10 seconds, is silent for 5, then starts again The pulses are about 5 per second. It's showing up on a lot of bands. Right now I have it at about 21.048, but have heard it on several ham frequencies. We haven't added any new electronics in the house at all. We are in a rural setting, with the nearest neighbor several hundred feet away. We do have cable TV and cable internet, and I wonder if this might be a test birdie I've heard mentioned in the past. It seems to run 24/7, and just started up within the last few days. Any ideas? Thanks in advance 73 Dave KB3MOW
Re: [digitalradio] Re: Odd noise in receiver
Thanks for the info, Bruce. I didn't have a chance to record it or measure it accurately before it disappeared Friday evening some time. As to if it's time synced, I would have to guess that it is. It was extremely close to 10 seconds on and 5 seconds off, and the number of pulses was 55 during the on period. Granted, timing it with a stopwatch is not exactly precise, but it was close enough that I'm reasonably certain it's timed somehow. The simple fact that it stopped Friday night leads me to believe it's some type of commercial activity. I've had the rig on a lot this weekend, and haven't heard it once. It also stopped before I could log exactly where it was. If I'm lucky, it's gone, never to return. I doubt it, however. If it comes back, I'll get a recording of it and post it. If you have a recording of yours, please send it to me! May not help, but it sure couldn't hurt! Tnx es 73 Dave KB3MOW Bruce Sawtelle wrote: Hi Dave, I have a similar type noise in our neighborhood. By doing some DF'ing, we've pinned it down to a neighbor's house, but haven't been successful yet in gaining their confidence to let us explore beyond their front door. Can here it on VHF when we're at their front porch. Is it time synced, i.e. is the accuracy such that it's being derived from a 60Hz/Xtal time base. In my case, it's not. It comes on for APPROX 12 seconds and goes off for APPROX 3 seconds, but if I listen to it over a few minutes, it will drift up or down. Also, I noticed I can hear it at ~ 16.7KHz offsets, which makes me think it could be PC video related. Not sure if it could be switching power supply related, I thought most of them were 100's Khz. Actually, It had been across the full 20M band last year when we were DF'ing, but now it's discrete. I have a wav file I can send you if that would help. Fortunately, it's been down to S2-3 as of late. It also seems to be tied to colder weather (thermostat control??). BTW, the neighbor is 300-400 feet away in a suburban area (70' x 120' lots) . W5AHC is another ham in the neighborhood and he's ~100 fett closer and hears it as well. Hope this helps. Let me know what it ends up being. tnx es 73 Bruce - W3NJ -
Re: [digitalradio] Re: Odd noise in receiver
Thanks, Gary! I'm trying to be open-minded about this. Today the noise seems to be gone completely. It disappeared yesterday evening and haven't heard it since. If it reappears on Monday, I'll have a better clue that it's something that belongs to the local cable company. I used to work in cable TV years ago, and I seem to recall a test device that sent this type of signal over the cable to test the in-line amplifiers, but my memory is not something to be relied on too heavily hi hi! Thanks and have a great weekend! 73 Dave KB3MOW grwescom wrote: This kind of noise has been showing up quite a lot lately. I've chased down a couple TVI complaints with similar characteristics. The problem has consistently been battery chargers, especially the kind to used to charge the batteries for portable tools. They tend to cycle charging power on and off. Now some of the wall wart chargers for small electronic stuff is starting to create the same kind of noise. This may not be your problem but I would recommend against ignoring the possibility that it might be. Gary - N0GW --- In digitalradio@yahoogroups.com mailto:digitalradio%40yahoogroups.com, Dave 'Doc' Corio [EMAIL PROTECTED] wrote: Wonder if anyone has encountered this type of noise. It's a raspy, pulsating sound. It lasts 10 seconds, is silent for 5, then starts again The pulses are about 5 per second. It's showing up on a lot of bands. Right now I have it at about 21.048, but have heard it on several ham frequencies. We haven't added any new electronics in the house at all. We are in a rural setting, with the nearest neighbor several hundred feet away. We do have cable TV and cable internet, and I wonder if this might be a test birdie I've heard mentioned in the past. It seems to run 24/7, and just started up within the last few days. Any ideas? Thanks in advance 73 Dave KB3MOW
Re: [digitalradio] Re: Odd noise in receiver
Hi, Dave and Gary: The absolute worst offender I've found at my QTH is the charger for my Motorola cell phone. 73, Mike N5UKZ Dave 'Doc' Corio wrote: Thanks, Gary! I'm trying to be open-minded about this. Today the noise seems to be gone completely. It disappeared yesterday evening and haven't heard it since. If it reappears on Monday, I'll have a better clue that it's something that belongs to the local cable company. I used to work in cable TV years ago, and I seem to recall a test device that sent this type of signal over the cable to test the in-line amplifiers, but my memory is not something to be relied on too heavily hi hi! Thanks and have a great weekend! 73 Dave KB3MOW grwescom wrote: This kind of noise has been showing up quite a lot lately. I've chased down a couple TVI complaints with similar characteristics. The problem has consistently been battery chargers, especially the kind to used to charge the batteries for portable tools. They tend to cycle charging power on and off. Now some of the wall wart chargers for small electronic stuff is starting to create the same kind of noise. This may not be your problem but I would recommend against ignoring the possibility that it might be. .
Re: [digitalradio] Re: Odd noise in receiver
I've never noticed anything from the charger for my Motorola, and sometimes I charge it right at the radio desk! Unfortunately, I haven't charged it for a few days, so I know it isn't that. Haven't charged anything or plugged anything new or different in. Noise disappeared last night and still isn't back, so maybe it moved on? Wishful thinking? Tnx es 73 Dave KB3MOW Mike Blazek wrote: Hi, Dave and Gary: The absolute worst offender I've found at my QTH is the charger for my Motorola cell phone. 73, Mike N5UKZ Dave 'Doc' Corio wrote: Thanks, Gary! I'm trying to be open-minded about this. Today the noise seems to be gone completely. It disappeared yesterday evening and haven't heard it since. If it reappears on Monday, I'll have a better clue that it's something that belongs to the local cable company. I used to work in cable TV years ago, and I seem to recall a test device that sent this type of signal over the cable to test the in-line amplifiers, but my memory is not something to be relied on too heavily hi hi! Thanks and have a great weekend! 73 Dave KB3MOW grwescom wrote: This kind of noise has been showing up quite a lot lately. I've chased down a couple TVI complaints with similar characteristics. The problem has consistently been battery chargers, especially the kind to used to charge the batteries for portable tools. They tend to cycle charging power on and off. Now some of the wall wart chargers for small electronic stuff is starting to create the same kind of noise. This may not be your problem but I would recommend against ignoring the possibility that it might be. .
[digitalradio] Re: Odd noise in receiver
This kind of noise has been showing up quite a lot lately. I've chased down a couple TVI complaints with similar characteristics. The problem has consistently been battery chargers, especially the kind to used to charge the batteries for portable tools. They tend to cycle charging power on and off. Now some of the wall wart chargers for small electronic stuff is starting to create the same kind of noise. This may not be your problem but I would recommend against ignoring the possibility that it might be. Gary - N0GW --- In digitalradio@yahoogroups.com, Dave 'Doc' Corio [EMAIL PROTECTED] wrote: Wonder if anyone has encountered this type of noise. It's a raspy, pulsating sound. It lasts 10 seconds, is silent for 5, then starts again The pulses are about 5 per second. It's showing up on a lot of bands. Right now I have it at about 21.048, but have heard it on several ham frequencies. We haven't added any new electronics in the house at all. We are in a rural setting, with the nearest neighbor several hundred feet away. We do have cable TV and cable internet, and I wonder if this might be a test birdie I've heard mentioned in the past. It seems to run 24/7, and just started up within the last few days. Any ideas? Thanks in advance 73 Dave KB3MOW
