Sandbagger
Administrator/The Boss
Posts: 6,245
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Post by Sandbagger on Apr 30, 2017 11:14:10 GMT -5
Caught a tone carrier this morning on channel 13. Direction was in the Boyertown/Happy Valley/Barto area. Seems to be gone now. Don't know how long it had been on before I saw it........
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Post by BBB on Apr 30, 2017 11:52:02 GMT -5
Just checked. Only tone(s) I heard was the Amtrak/ Septa Train speed control system off in the distance when I switched to sideband. Maybe someone had their mic keyed by accident and 0-5'd their radio finally.
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Sandbagger
Administrator/The Boss
Posts: 6,245
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Post by Sandbagger on Apr 30, 2017 12:29:49 GMT -5
Just checked. Only tone(s) I heard was the Amtrak/ Septa Train speed control system off in the distance when I switched to sideband. Maybe someone had their mic keyed by accident and 0-5'd their radio finally. Update: The carrier is now on channel 12, still in the same direction.
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Post by MonkeyMan on Apr 30, 2017 12:56:06 GMT -5
I don't hear anything over this way.
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Sandbagger
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Posts: 6,245
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Post by Sandbagger on Apr 30, 2017 21:48:12 GMT -5
I don't hear anything over this way. Update 2: I've now observed the signal to slowly slide down from 13, through 12 down to 27.100. It has since slid back up to about 27.111. Since no one else seems to be able to hear it, I'm now thinking this is something close to me. I unplugged my house trailer's power converter (It's a switching supply) to see if that might be the culprit, but no dice. So I guess I'll take a ride around and see where I lose the signal. Hopefully it's not some neighbor with a newfangled digital widget. That's all I need......
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Post by BBB on May 1, 2017 11:17:00 GMT -5
I have noticed this sliding frequency tone(s) in the past. Just chalked it up to some 27 MHz college science radio experiments. "3.3.1.1 Dielectric Properties The dielectric properties for all three egg components were found to fit the following power equation: Where is either the dielectric constant, or loss factor, while f is frequency (Hz) and ranges from 10 MHz to 3 GHz. The remaining coefficients a,b, and c are given in Table 3.2. A plot of the equations can be found in Fig. 3.8. Using the values calculated from equation (6), regression equations for the frequency 27.12 MHz (Table 3.3) were derived for use in the simulations. The dielectric properties calculated from these equations at 24°C varied by less than 8% of the measurements made by Guo et al. (2007) with the exception of albumen loss factor which went up to 12%" or maybe this guy lives down the street from you: www.youtube.com/watch?v=c9s7yHq393k
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Sandbagger
Administrator/The Boss
Posts: 6,245
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Post by Sandbagger on May 1, 2017 11:41:13 GMT -5
Update 3: Well, I now know about where it's coming from. It's not a wide area disrupter, rather it's a low power device coming from a house 2 or 3 doors up the perpendicular side street behind my house directly to the north (hence the beam heading). It's now back firmly on 15a (27.145), and may have been there for a while, and I just never noticed it. Not sure what it is (dog fence? Security system? Solar powered lighting? car alarm?), or why it occasionally slips down in frequency (solar batteries dying?). Hopefully it stays where it is. Being that it seems to be a digital tone, it does splatter a little, but nothingthat will bother me unless it slips down to channel 13 again..... Then I'll pile all the logs on the fire, point the beam that way, "drop the maul all day long", and see what that does......
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Post by BBB on May 2, 2017 13:22:14 GMT -5
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Sandbagger
Administrator/The Boss
Posts: 6,245
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Post by Sandbagger on May 2, 2017 13:46:36 GMT -5
I'm not going to invest the time and expense in a separate antenna for something like this....... Unless it becomes a regular on channel 13. Those LAN-over-AC networks ARE a POS for line noise. I had a set of them, and I tried them out once. When I saw the noise it put on my radios, they were pulled out quicker than you can say POS!
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