Unkown Sound

[Rippey574]

Would love to hear this file if you can upload it. I spend a lot of time, at night, on longwave. For what it might be worth, I get some interesting tones on specific longwave freqs -- which coincide perfectly with the elevator landing on my floor & its door opening also. (And a different, more interesting wave of sound when the elevator takes off...) Some of what's heard on longwave are unintentional radiators.

Larry Lanberg
Richmond VA

If you go to http://rippey475.tripod.com/ (its triprod so make sure you have a pop up blocker). Click on the unknown sound on 210Khz and it will download it in mp3 format. I have yet to get to a direct download linking site and tripod does not allow you to direct link download. I take decent precautions to prevent interference with local stuff (not fool proof tho). I use a ground indepented of the house, I use battry power when scanning, and my antenna is outside and away from the house. Also make shure just about every thing is shut down in the room.

 

[lanbergld]

Hey thanks Michael. I'll download the sound file in a few minutes. And don't get me wrong -- I wasn't suggesting that your mysterious signal is an unintentional radiator (such as an elevator), I just threw that into the discussion. A lot of the signals down there, well, we just don't know what they are. But we always aim to find out. Which makes longwave the most interesting band, in my personal opinion.

Larry Lanberg
Richmond VA

 

[Rippey574]

LoL, I didn't take it as that way. When I first got that radio, I found that every thing makes a noise, especially my tv remote around that frequency. Thats when I started to play around with shielding from interfence. I am usta having to do it for my base station in the house, just not on that scale of sensativity. Well let me know if you think it is some other source of interferance or if you think you found what it could be. Also in my opnion Long Wave is the most intersting of them all . Their is just no other with all the charistics of LW.

 

[lanbergld]

I listened to the file last night. Very interesting. It sort of sounded like a data signal, but at the same time it sort of sounded like feedback. It didn't even remotely sound to me like a beacon however. Have you landed any beacons yet? There's sort of a trick to hearing those; they don't just jump out of the speaker at you. There's plenty of beacons out there.

A couple weeks ago I got a little 25-watt beacon located in Ohio, maybe 400-500 miles from here (407 IL). I don't know how that happened (considering my inner city location) but dollars to doughnuts I'll never pick it up again. And I haven't.

As far as LW broadcast stations go -- I think you mentioned something about those in a post too -- here is a pretty good list of those. It hadn't been updated in a couple years but its a good general reference I think.

http://dxworld.com/cgi-bin/bcbdx.sh

Larry Lanberg

 

[Rippey574]

I think i have heard a beacon only once, and it wasn't with that radio. It was with a Hallicrafters SX-117 it just made a sound like chhhhhhuurp chuuuurp. Now that you posted A list ill give them a listen. I will do some more Google in on what else can run on that fq that could be data. If it was interference, I haven't found the source of it yet, I scoped my house today with the radio on that Fq looking for it. mabey it was random, guess Ill probly never know.

 

[Rippey574]

Found something on my first look into google
http://www.iopan.gda.pl/rbdo/fizyka/akust/aparat.html "Atlas DESO 20" section. And a few more of those run on that freq in different sections. . After reading the main page I found that it could be an echo locater for the ocean floor, but I dont know if I would of heard that.

"The measurement data presented in this index can be divided into several groups:

* depending on the way of measuring: stationary data (stations) and transects;
* depending on the topic: biology, sea bottom and gas bubbles(in polish);
* depending on the location: the Baltic Sea, Arctics (Spitsbergen, the Norwegian Sea) and Antarctics (the Southern Atlantic) ;
* depending on the methodology: single and multiple frequency (chirp-sonar, boomer); calibration data.

Majority of our experimental research is based on the measurement of backscattered acoustic signals (echosignals or volume reverberation) by means of different equipment, among it the echosounders SIMRAD, ATLAS-KRUPP or HONEYWELL-ELAC working at frequencies from 30 till 200 kHz. The sampled (digitised) echo envelopes are recorded on computer disc. Knowledge of the fundamental acoustic parameter - the backscattering strength - and its temporal and spacial distributions allows to determine different environmental parameters: biomass distribution, structure of the scattering layers, gas bubble concentrations, acoustic properties of the sea bottom. Each of the mentioned tasks requires the specialised methods of signal processing (automatic ellimination of disturbances, filtration, averaging, echo integration). Data were collected during several cruises and in the experimental tank.
This paper was made by: " - From the websites main page.

 

[lanbergld]

I think i have heard a beacon only once, and it wasn't with that radio. It was with a Hallicrafters SX-117 it just made a sound like chhhhhhuurp chuuuurp. Now that you posted A list ill give them a listen.

Hi Michael, The list I posted wasn't for beacons -- it was for longwave broadcast stations (music, talk, etc.).

The beacons are morse code. Slow Morse code. You shouldn't hear any churping or anything like that. If the beacon is KLJ in Ashland Va, for example, you'll simply hear K-L-J in Morse over & over. Many times the Morse is buried deeply in the static, and, there's usually a pause before the letters repeat themselves. So unless you actually stop on a frequency & listen a while, you can tune right over them -- not knowing they were ever there.

I hear beacons better when I am in AM mode, on longwave. Some people say they hear beacons easier when in sideband mode, but that isn't the case for me. I can hear them both ways -- but in AM mode the Morse tones have more 'punch'. At least to my ears anyway.

It takes a really special antenna to do well on longwave. I make my own closed loops, with large apertures, out of insulated wire. No tools involved really, just the cost of the wire.

Larry Lanberg
Richmond VA

 

[Rippey574]

i tried to experiment with a square loop but didn't have any luck with it for lw.