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Author Topic: Nit Nit Nit Nit Nit Nit Nit...  (Read 4969 times)
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W1RKW
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« on: November 12, 2005, 07:23:38 PM »
Anyone know what that Nit Nit Nit Nit sound that appears and disappears on 75 from time to time is? It's annoying to say the least.
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Bob
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W1IA
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« Reply #1 on: November 12, 2005, 11:36:59 PM »
Quote from: W1RKW on November 12, 2005, 07:23:38 PM
Anyone know what that Nit Nit Nit Nit sound that appears and disappears on 75 from time to time is? It's annoying to say the least.

Ionisponder from Westford, Mass....Haystack Observatory.

Very annoying and creeps up and down the band...uses a doppler type device and NVIS antennas pointed straight up.

Brent
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Jeff OGM
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« Reply #2 on: November 13, 2005, 07:31:50 AM »
And the source of the "Nit Nit Nit Nit Nit Nit Nit..." even has a website:

http://www.haystack.mit.edu/mhrobs/instrument_summary.html

Jeff
KA1OGM
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WA3VJB
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« Reply #3 on: November 13, 2005, 09:51:41 AM »
Unless they've added some HF gear since they last updated their website ten years ago, the only specific transmitters I see listed on there are a couple of 150mHz, 2 megawatt jobs, and a pair of 2 megawatt jobs up on 440mHz.
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W1GFH
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« Reply #4 on: November 13, 2005, 01:04:41 PM »
Sounds like an electric blanket attached to a CB leanyar. Or.....

* crumbradios.jpg (60.16 KB, 240x301 - viewed 583 times.)
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K3ZS
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« Reply #5 on: November 13, 2005, 03:28:01 PM »
Check out their  web site Digisonde.   You can get real time ionospheric soundings it.  The last sounding went on at the low end of the 80 M band.  It must be interesting stuff if you can make it all out (I can't).
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W1RKW
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« Reply #6 on: November 13, 2005, 04:17:26 PM »
So my question is if this is legal how can they do this Nit Nit Nit crap over a band segment and be legal?  It doesn't make any sense. Then again maybe common sense has been thrown to the wind.
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Bob
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W1UJR
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« Reply #7 on: November 13, 2005, 10:14:44 PM »
I agree its a huge PIA, esp here in the Northeast.

Check out this link that WA2CYT sent me, seems to answer some questions -->>> www.cos.ict.kth.se/education/msc/radio/courses/RKBASIC_2E1511_2005/downloads/Manual_Lab1.pdf
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Steve - WB3HUZ
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« Reply #8 on: November 16, 2005, 11:53:17 PM »
This one sounds a little like the ztt-ztt signal on 75 meters.

RACAL / THALES PANTHER-H, INTELLIGENT FREQ. HOPPER
http://rover.vistecprivat.de/~signals/WAV/PANTHER-H_SOC.WAV

So do these two.

ARCOTEL FARCOS 1800Bd, EADS/RACOMS (ALE)

http://rover.vistecprivat.de/~signals/WAV/ARCOTEL1800.wav
   
ARCOTEL MAHRS 2400Bd, EADS/RACOMS (ALE)

http://rover.vistecprivat.de/~signals/WAV/ARCOTEL2400.wav


None of the ionsonde signals listed at the above site sound like the 75 meter signal.
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