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Originally posted by Tom_Proctor
I know what OTH Radar sounds like, this isn't it. It just started at 10PM for me, and will go on for AT LEAST another 5-6 hours.
Originally posted by Bedlam
Originally posted by Tom_Proctor
I know what OTH Radar sounds like, this isn't it. It just started at 10PM for me, and will go on for AT LEAST another 5-6 hours.
It would be interesting if we could get a number of hams or higher-end SW listeners with directional antennas that could triangulate the thing.
These types of signals used to fascinate me when I was a kid. Also the numbers stations - they've been going on since I had my first surplus Collins tube receiver, and that was in the late 60s.
Originally posted by Tom_Proctor
But I have my directional loop antenna and it points me either southeast or northwest of sierra vista, AZ
Originally posted by Bedlam
Originally posted by Donny 4 million
Why do you mix modulation with side band?
Modulation produces sidebands. That's all it does. They can be mathematically complex, in the case of FM or PM, or pretty straightforward, in the case of AM or SSB.
For SSB or DSB, you keep one or both sidebands and chuck the carrier - you don't need it and it eats half the power. You do have to replace it at the receiver if you want to make sound, though.
Originally posted by Tom_Proctor
7406 is coming in for me, though not very strong. It might be hopping over me or it's directed another way tonight.
Originally posted by Donny 4 million
Originally posted by Tom_Proctor
7406 is coming in for me, though not very strong. It might be hopping over me or it's directed another way tonight.
Can you query other Hams? What is the buzz?
Originally posted by Donny 4 million
Please show how modulation causes sidebands in Amplitude Modulation.
Originally posted by Bedlam
Pfeh. I stated that badly.
When you're at 100% modulation in AM, the sidebands will add half the power of the carrier. So if you start off with a 100W carrier, at 100% modulation, the sidebands will contain 50W of power, 25W in each sideband. The total power will be 150W.
/see, donny, I'm even picky of myself. It's a small point to worry about, but important to be accurate.
Originally posted by Tom_Proctor
It goes on for hours at a time starting at 12am Pacific Time and I haven't heard it end, but it does eventually. It fades in and out, changes it's sound. It's almost like HAARP has been trying to aim and find the perfect frequencies to create an earthquake. The waterfall of the signal is also interesting. I know if you take two frequencies, say 740Hz and 746Hz, the ending result is 6Hz, which is an extremely low, vibrating signal like a subwoofer.