46.85 mystery

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deacon
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46.85 mystery

#1 Post by deacon » 22 Apr 2016 13:22

I live about 2 to 4 air miles from the Otis base and tower. I have always monitored 46.85. I can hear the copters 25 or more miles out. However, I never hear a response from the base station, nothing, just the rushing sound on an open squelch. Is there a different frequency that the base uses to answer the copters?? Thank you for the help.

Chuck

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schwab
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#2 Post by schwab » 22 Apr 2016 21:01

Could it be analog encryption?
Jacob
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KB1FJR
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#3 Post by KB1FJR » 22 Apr 2016 21:12

SINCGARS with maybe data? But that doesn't make sense.

deacon
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#4 Post by deacon » 23 Apr 2016 07:53

I kept the squelch open to hear the weakest response. Nothing. No Encryption. Perhaps I am so close to the base that the signal is passing over my antennas?? Is that possible??

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N1BHH (Silent Key)
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#5 Post by N1BHH (Silent Key) » 23 Apr 2016 19:58

deacon wrote:I kept the squelch open to hear the weakest response. Nothing. No Encryption. Perhaps I am so close to the base that the signal is passing over my antennas?? Is that possible??
Not likely, unless the ground station is on a low power "manpack" radio.

What call signs were used, who were they talking with, BOSOX OPS, YANKEE OPS, MINUTEMAN OPS?
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deacon
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#6 Post by deacon » 24 Apr 2016 13:35

I usually hear them call OPS and/or Ground OPS.

deacon
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Army HELOS at JBCC

#7 Post by deacon » 12 Jun 2016 16:58

My 46.85 frustration continues. Lots of traffic on 46.85, 46.75 and 38.50 this weekend. Still no "operations" (base) response, only hearing the HELOS. I programmed every freq. I could find relevant to the Army at JBCC. Nothing, this is a tough one. I live about 1.5 miles the landing field.

Chuck

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Mark SNE Moderator
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#8 Post by Mark SNE Moderator » 12 Jun 2016 19:46

I'm uploading all of the low band frequencies listed in the Wiki here into my 996XT and will see what I can receive.
Mark,

Scan New England Moderator



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ecps92
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#9 Post by ecps92 » 13 Jun 2016 06:25

http://scan-ne.net/wiki/index.php?title=Mass.Military
Please make a submission to get the Wiki's updated with the Recent Confirmations
deacon wrote:My 46.85 frustration continues. Lots of traffic on 46.85, 46.75 and 38.50 this weekend. Still no "operations" (base) response, only hearing the HELOS. I programmed every freq. I could find relevant to the Army at JBCC. Nothing, this is a tough one. I live about 1.5 miles the landing field.

Chuck
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N1BHH (Silent Key)
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#10 Post by N1BHH (Silent Key) » 13 Jun 2016 10:25

There is a sub page for Low Band.

http://scan-ne.net/wiki/index.php?title=VHF_Low
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cdgordon
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#11 Post by cdgordon » 13 Jun 2016 11:27

How about Close Call if you have it available? wait until you hear a conversation and start it

chris

deacon
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#12 Post by deacon » 15 Jun 2016 11:02

cdgordon wrote:How about Close Call if you have it available? wait until you hear a conversation and start it

chris
This morning I heard several HELOS signing on. They indicated that they would be working 46.85 and 32.875. I confirmed traffic on 32.875. but again, never heard base that is designated as operations. I did not see 32.875 in the wiki.

Chuck

ChrisP
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#13 Post by ChrisP » 15 Jun 2016 11:34

I don't know a lot about about military communication, but is it possible that it's duplex (base transmitting back on a different frequency), or possibly it's a repeater set-up and you're hearing the helicopters on the input frequency? (Assuming the base is hardwired or microwaved into the repeater). Just a thought...
Chris
Poland, ME

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schwab
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#14 Post by schwab » 15 Jun 2016 17:26

Another possibility is this could be and 'advisory' frequency, where aircraft simply announce their intentions, and there is no base station.
Jacob
KB1VLA

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