Anyone help ID this frequency please?

Scanning radio frequencies for the East Midlands
Post Reply
JCastle
Regular
Regular
Posts: 6
Joined: 11 Jun 2012, 14:36

Anyone help ID this frequency please?

Post by JCastle »

Hi James here again, recent new person.

Well i've found 52 frequencies on my gre psr-295 with a telescopic antenna, and im enjoying it. I found this frequency 131.11666 AM and was wondering if anyone could help me identify it please!? Im in Nottm. Im asking as, i recently got the new Ultimate Scanning Guild 2012 book with the cd software, and well i cant seem to find it in the book, so anyone out there know anything?

Thanks for the help. J.
User avatar
bigpimp347
Legend
Legend
Posts: 8792
Joined: 08 Aug 2009, 10:23
Location: J26 Nottingham

Re: Anyone help ID this frequency please?

Post by bigpimp347 »

hello james...

ask bassman he knows everything about scanning )

no seriously the frequency you have is probably 131.11575 or 131.11750 or there abouts.
I want to Die Asleep like my Grandad did,
Unlike his Passengers, Screaming and Shouting.!
User avatar
Minus1
Top Poster
Top Poster
Posts: 1222
Joined: 12 Jun 2011, 11:15
Location: West Midlands

Re: Anyone help ID this frequency please?

Post by Minus1 »

Firstly, your quoted frequency of 131.11666 is a valid 8.33kHz frequency, the two bigpimp347 quoted are not!

However, I suspect you are picking up 131.125 which is the next 8.33kHz channel above the frequency you gave. I doubt your scanner has an 8.33kHz AM bandwidth mode (even if it has 8.33kHz steps), it'll just use 25kHz bandwidth.

131.125 is London ATC used by Daventry Sector, so you'll get southbound traffic thru the Midlands, and departures from LTMA (London Terminal Maneuvering Area) to the North West.
It is a 25kHz bandwidth channel.

There is more than one ground transmitter for this freq. I can receive ground transmissions on exactly 131.12 MHz clearly here in Birmingham, so this is a case of two frequencies being used, each 5kHz offset from the centre frequency in order to prevent interference between the two freqs. 131.12 is probably Clee Hill.

You will see that 131.12 is very close to 131.11666, so it is easy to believe that you are receiving at 8.33kHz channel, when you're not, the planes will be on 131.125 exactly.

There will be another transmitter using exactly 131.13 MHz, probably somewhere East of Birmingham, or nearer London.

Confusing isn't it?


Do you know about Planefinder, which lets you see where the planes you are hearing are?
http://planefinder.net/
KEY : = channel/stud | ~ = CTCSS/DCS | ^ = transmitter site | ¯ = overhead | * = trunked
Post Reply