458.8000 Nottingham Midlands ??

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Re: 458.8000 Nottingham Midlands ??

Postby bigpimp347 » Wed Feb 06, 2019 4:12 pm

I appreciate it's a UK-G channel and i understand it was used for RC model aircraft,
and the whole band around is telemetry,

BUT..

the audio ?? traffic in the back ground, the banging about and fumbling, muffled voices and such like..
it's clearly an FM transmitter with audio stuck in TX.
but there's two, the other is on 500, so rules out UK-G, telemetry and RC models.

hence why asking if anyone has stumbled across them ??
a mate of mine said he heard one in derby also,
only found these by scanning the UK-G channels and stopped on this carrier then when i was checking up and down the band i came across the other..
bigpimp347
 
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Re: 458.8000 Nottingham Midlands ??

Postby Steve » Wed Feb 06, 2019 4:18 pm

Lemme have a look what I get from here, be right back...
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Location: Derbyshire

Re: 458.8000 Nottingham Midlands ??

Postby Steve » Wed Feb 06, 2019 4:38 pm

This is what I get here currently on 454MHz using 12.5 steps.

458.000 - Constant carrier. Sounds FM and has a pip every second. This is bleeding over though from 457.9875 which is a stronger signal.
458.525 - Constant Data (Weak)
458.725 - Constant Data (Strong)
458.750 - Constant Data
458.850 - Constant Data
458.925 - Constant Data (Weak)
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Re: 458.8000 Nottingham Midlands ??

Postby bigpimp347 » Thu Feb 07, 2019 12:03 am

i get quite a few data burst's and such..
but these two carriers are just on odd frequencies,
one being UK-G other being data,
i'll see if they appear tomorrow, i'm out most the day but if they rock up before i go out i'll post it up that they're on..
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Re: 458.8000 Nottingham Midlands ??

Postby bigpimp347 » Wed Feb 13, 2019 10:00 am

*SOLVED*

458.800 and 458.500

Severn Trent Water..

what they are are water flow monitors, a silvery cylinder thing with a transmitter, aerial on the top and a type of microphone sensor on the bottom,
these are just placed on top of the water pump in the ground, pavement or road and used to monitor the flow.

i only knew it was close as my 446 and 433 mhz radios both got a load of crackles and splatter, i was monitoring 800 and it was full signal, Baofeng, no antenna fully quietning so looked outside and saw him 20ft outside my house playing down a hole..
so i went out and had a chat where he shown me the other unit and we did a couple of test's to prove it was them..

he says the range is about 200mtrs, i said i'd received them at up to 2 miles..!!!!

so two new frequencies now answered...
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