Re: [Elecraft] HF noise.....10 M
Anyone have any idea what those weeblies are on ten meters? They typically start high in frequency and flitter past the receiver then stop abruptly. They sound like a very unstable oscillator, almost like there's a random (or encoded ?) narrow frequency modulation as they move lower down the band. They are quite noticeable on the panadapter display and appear to have several rates of downward frequency shift. Also, occasionally, a wide band hump for lack of a better word. will appear in the display and pop off a second later as quickly as it came. I've tried tracking them down, but they all seem to not be coming from anything in close proximity to me. I've heard these weeblies for many years. They're not a QRM problem since they're only in the passband for a second or so and occur at about 1 to 5 per minute. It's just that this is the first time I've been able to see them on the screen. The display kinda reminds of the Quark capture displays we used to see. 73, Charlie k3ICH - Original Message - From: Thorpe, Jeffrey jtho...@liberty.edu To: elecraft elecraft@mailman.qth.net Sent: Tuesday, October 14, 2014 9:39 AM Subject: Re: [Elecraft] HF noise.30m Does the CW signal show up on a particular schedule? Does it seem to repeat its transmission a lot? It would be interesting to hear a modern numbers station like this - they've really become scarce these days since the rise of the internet. Jeff KG7HDZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] HF noise.....10 M
Charlie etal I have seen that here though it tends to stay. Sunday I had a weird thing happen, on the p3 scope, a tone would sound then a herring bone effect would occur across the whole p3 screen, these herring bones! We're spaced about every 1khz top and bottom. This Tone, maybe a fishing net sounder! Or even OTHR, Went off every minute or so, making 10m impossible to use. Anyone know why his happens and or what causes it!! Ken.. G0ORH Sent from my iPad On 14 Oct 2014, at 15:13, Charlie T, K3ICH pin...@erols.com wrote: Anyone have any idea what those weeblies are on ten meters? They typically start high in frequency and flitter past the receiver then stop abruptly. They sound like a very unstable oscillator, almost like there's a random (or encoded ?) narrow frequency modulation as they move lower down the band. They are quite noticeable on the panadapter display and appear to have several rates of downward frequency shift. Also, occasionally, a wide band hump for lack of a better word. will appear in the display and pop off a second later as quickly as it came. I've tried tracking them down, but they all seem to not be coming from anything in close proximity to me. I've heard these weeblies for many years. They're not a QRM problem since they're only in the passband for a second or so and occur at about 1 to 5 per minute. It's just that this is the first time I've been able to see them on the screen. The display kinda reminds of the Quark capture displays we used to see. 73, Charlie k3ICH - Original Message - From: Thorpe, Jeffrey jtho...@liberty.edu To: elecraft elecraft@mailman.qth.net Sent: Tuesday, October 14, 2014 9:39 AM Subject: Re: [Elecraft] HF noise.30m Does the CW signal show up on a particular schedule? Does it seem to repeat its transmission a lot? It would be interesting to hear a modern numbers station like this - they've really become scarce these days since the rise of the internet. Jeff KG7HDZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to g0...@sky.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] HF noise.....10 M
A digitally controlled motor can do that. Think dishwasher, washing machine... Mine does it but I can tell when a neighbor does chores too. 73, Rick wa6nhc Tiny iPhone 5 keypad, typos are inevitable On Oct 14, 2014, at 8:47 AM, Ken Chandler g0...@sky.com wrote: Charlie etal I have seen that here though it tends to stay. Sunday I had a weird thing happen, on the p3 scope, a tone would sound then a herring bone effect would occur across the whole p3 screen, these herring bones! We're spaced about every 1khz top and bottom. This Tone, maybe a fishing net sounder! Or even OTHR, Went off every minute or so, making 10m impossible to use. Anyone know why his happens and or what causes it!! Ken.. G0ORH Sent from my iPad On 14 Oct 2014, at 15:13, Charlie T, K3ICH pin...@erols.com wrote: Anyone have any idea what those weeblies are on ten meters? They typically start high in frequency and flitter past the receiver then stop abruptly. They sound like a very unstable oscillator, almost like there's a random (or encoded ?) narrow frequency modulation as they move lower down the band. They are quite noticeable on the panadapter display and appear to have several rates of downward frequency shift. Also, occasionally, a wide band hump for lack of a better word. will appear in the display and pop off a second later as quickly as it came. I've tried tracking them down, but they all seem to not be coming from anything in close proximity to me. I've heard these weeblies for many years. They're not a QRM problem since they're only in the passband for a second or so and occur at about 1 to 5 per minute. It's just that this is the first time I've been able to see them on the screen. The display kinda reminds of the Quark capture displays we used to see. 73, Charlie k3ICH - Original Message - From: Thorpe, Jeffrey jtho...@liberty.edu To: elecraft elecraft@mailman.qth.net Sent: Tuesday, October 14, 2014 9:39 AM Subject: Re: [Elecraft] HF noise.30m Does the CW signal show up on a particular schedule? Does it seem to repeat its transmission a lot? It would be interesting to hear a modern numbers station like this - they've really become scarce these days since the rise of the internet. Jeff KG7HDZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to g0...@sky.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to happymooseph...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] HF noise.....10 M
These weeblies are all over the 10 meter band here in northern Calif Monday through Saturday; gone on Sunday. Best I can find is that they are radiated emissions from HF ultrasonic welders (used to seal plastic packaging, emboss car mats, etc.) They sound like they are a high power oscillator which changes frequency during the welding operation; starting high and decreasing in frequency as the weld is accomplished. Such welders are not supposed to operate in the ten meter band in the US, so I suspect they are rogue, operating international. Dan AC6DM Anyone have any idea what those weeblies are on ten meters? They typically start high in frequency and flitter past the receiver then stop abruptly. They sound like a very unstable oscillator, -- View this message in context: http://elecraft.365791.n2.nabble.com/HF-noise-30m-tp7593789p7593884.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] HF noise.....10 M
If memory serves me right there is a ICM band between 10 and 11 meters that would be a logical place for an welder. Assuming they are using a power oscillator the signal could be quite broad band and unstable just like a microwave oven. It also sounds like a foreign design. I think a call to the FCC is in order. Fred, AE6QL -Original Message- From: Dan Maase AC6DM via Elecraft elecraft@mailman.qth.net Sent: Oct 14, 2014 8:06 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] HF noise.10 M These weeblies are all over the 10 meter band here in northern Calif Monday through Saturday; gone on Sunday. Best I can find is that they are radiated emissions from HF ultrasonic welders (used to seal plastic packaging, emboss car mats, etc.) They sound like they are a high power oscillator which changes frequency during the welding operation; starting high and decreasing in frequency as the weld is accomplished. Such welders are not supposed to operate in the ten meter band in the US, so I suspect they are rogue, operating international. Dan AC6DM Anyone have any idea what those weeblies are on ten meters? They typically start high in frequency and flitter past the receiver then stop abruptly. They sound like a very unstable oscillator, -- View this message in context: http://elecraft.365791.n2.nabble.com/HF-noise-30m-tp7593789p7593884.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to fptowns...@earthlink.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
