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Military Monitoring Forum - Discussions regarding monitoring military communications on the ground, in air and at sea. Please keep USCG discussion to this forum also.

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Old 02-10-2018, 10:15 AM
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Question "Ground freq 15.205" modulation?

This seems too easy so I would like anyone's non-speculation input (i got the speculating bit covered, thx).

observing a relatively large scale air/ground, air-defense exercise last night. mult AH64s in the fray plus one up high orbiting and tallying scores vs dudes in the woods with HMGs and MANPADs (simulators, them H64's is costly to blowed outta da sky i hears) etc. what i managed to capture is as follows to give context in advance:

FM 45mHz ="OpFor freq" Ground, air/ground

AM 141Mhz= "Victor" only heard air to air

AM 273mHz= "Air Battle" only heard air to air

at one point air to air, on "Victor", one asks another for the "ground freq" which the reply comes (after jumbling the numbers a few times and making me thank my lucky stars i was recording)

"one five decimal two zero five" ie:15.205

so i realize this is normally an AM freq but this was apparently for ground troops, mobile, tactical environment etc. I have Uniden BR330Ts to try an cover as many bases as possible, so i can tune this freq. i haven't encountered this situation before (ie something under 30mHz)

the question is, standard FM?
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Old 02-10-2018, 10:31 AM
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If it was really 15 MHz then it would be SSB not FM.
Since 15.205 is in the 19 meter SW broadcast band you probably misunderstood something.
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Old 02-10-2018, 11:48 AM
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Quote:
Originally Posted by nd5y View Post
If it was really 15 MHz then it would be SSB not FM.
"so i realize this is normally an AM freq "

Quote:
Since 15.205 is in the 19 meter SW broadcast band you probably misunderstood something.
"making me thank my lucky stars i was recording"

clear as a bell, i was using signal stalker at the time to give an idea of proximity/clarity.
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Old 02-10-2018, 12:54 PM
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15205 USB could have very well been a NVIS tactical frequency for the training.
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Old 02-10-2018, 1:19 PM
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Default odd thought

could they have dropped the 1 like in standard aviation ?
and that would make it 115.205.
yes i know it is in the navigation part, but who knows ?
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Old 02-10-2018, 2:25 PM
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These type of things pop up on HF quite a bit.
As other said, most likely will be USB voice.

But I have caught FM voice on HF (3, 6 and 7 megs) before from US military training on a few occasions.
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