455.475Mhz, Zoo???

Scanning radio frequencies for the North West
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455.475Mhz, Zoo???

Postby Crusader » 12 Oct 2012, 14:44

Hi guys,listening to 455.475 Mhz this afternoon i heard two women having a QSO,one asked the other if she was "still at the monkey house" ,im only 2 miles away from the Chester Zoo & the signal did'nt have full noise quietening & im wondering if anybody else can confirm as to what i heard is at Chester Zoo or another zoo nearby?? regards,Shaun :)

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Re: 455.475Mhz, Zoo???

Postby thelad » 12 Oct 2012, 14:49

I have just passed there with my scanner,shame i had not read this earlya.
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Re: 455.475Mhz, Zoo???

Postby Crusader » 12 Oct 2012, 14:50

Hi fella,it only happened minutes before i started this thread.

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Re: 455.475Mhz, Zoo???

Postby Minus1 » 12 Oct 2012, 16:23

http://spectruminfo.ofcom.org.uk/spectr ... nd+licence

(Look at the site location, not the address)

I though "Colour Codes" related to digital transmissions.
KEY : = channel/stud | ~ = CTCSS/DCS | ^ = transmitter site | ¯ = overhead | * = trunked

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Re: 455.475Mhz, Zoo???

Postby Crusader » 12 Oct 2012, 16:39

Hi & thanks for that link,i googled "North Of England Zoological Society" & it comes up as Chester zoo,so it must be them,maybe they were'nt full noise quitening to me because they were using UHF handhelds indoors which would explain a lot as its 2 miles to the zoo from my QTH,also please can you enlighten me as to what "colour codes" mean??? :?

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Re: 455.475Mhz, Zoo???

Postby iansradios » 12 Oct 2012, 17:00

colour codes mean they use digital radios,colour codes are the new ctcss and dcs..

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Re: 455.475Mhz, Zoo???

Postby Crusader » 12 Oct 2012, 17:36

Digital radios,im still naive as to what you mean? :? with you saying colour codes are the new ctcss do you mean that what im hearing from Chester zoo is going through some sort of UHF repeater??

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Re: 455.475Mhz, Zoo???

Postby Minus1 » 12 Oct 2012, 19:42

Assuming you heard NFM transmissions, what's in the WTR doesn't tie up as it implies digital transmissions, which you'd just hear as data noise on an analog scanner.

What do you get on the other 2 frequencies?
KEY : = channel/stud | ~ = CTCSS/DCS | ^ = transmitter site | ¯ = overhead | * = trunked

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Re: 455.475Mhz, Zoo???

Postby Crusader » 12 Oct 2012, 19:47

Minus1 wrote:Assuming you heard NFM transmissions


Yes what i heard was definitely an NFM transmission.

Minus1 wrote:What do you get on the other 2 frequencies?


Hi,i aint tried listening to them yet,will have a listen this next few days.

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Re: 455.475Mhz, Zoo???

Postby iansradios » 13 Oct 2012, 12:14

chester zoo use trbo have done a while now,alls you will here is a trunked data type noise,,no voice.

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Re: 455.475Mhz, Zoo???

Postby Crusader » 13 Oct 2012, 22:14

Ian im less than 2 miles from Chester zoo & zoo's are'nt in every town & i know what i heard was two women talking in "voice" mode,the only other zoo's around here are at Colwyn Bay & Knowesley safari park which i don't think has a "monkey house",anyway it was Minus1's post with the Ofcom link that more or less narrowed it down to being at Chester,where else could it be?? as it was simplex i was hearing,no repeater from what i could tell.

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Re: 455.475Mhz, Zoo???

Postby iansradios » 13 Oct 2012, 22:48

chester zoo only use trbo..you cannot pick up digital on a analogue scanner,unless someone has picked up an old radio,but im pretty sure that it was a diffrent freq..not 100percent but what you heard will not be a trbo radio its impossible.

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Re: 455.475Mhz, Zoo???

Postby thelad » 14 Oct 2012, 07:16

Crusader wrote:Ian im less than 2 miles from Chester zoo & zoo's are'nt in every town & i know what i heard was two women talking in "voice" mode,the only other zoo's around here are at Colwyn Bay & Knowesley safari park which i don't think has a "monkey house",anyway it was Minus1's post with the Ofcom link that more or less narrowed it down to being at Chester,where else could it be?? as it was simplex i was hearing,no repeater from what i could tell.
was at Colwyn bay zoo yesterday, they were not using this freq and dont have a monkey house, i know Chester zoo have a monkey house, maybe it was a vet visiting there.
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Re: 455.475Mhz, Zoo???

Postby Crusader » 14 Oct 2012, 13:51

thelad wrote: was at Colwyn bay zoo yesterday, they were not using this freq and dont have a monkey house, i know Chester zoo have a monkey house, maybe it was a vet visiting there.


Cheers mate,that takes Colwyn Bay zoo out of the picture then im im sure Knowesly safari park don't have a monkey house either,it did'nt sound like a vet was visiting,anyway i will monitor 455.475 today
(which maybe queit with it being Sunday) and i will listen again this coming week and give any further updates if i hear owt :D

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Re: 455.475Mhz, Zoo???

Postby Crusader » 15 Oct 2012, 14:45

Been listening again to 455.475mhz today & its been like listening to Noah's Ark being rhymed off with all the different animal names i have heard :lol: talk about Giraffe's, the monkey house again,etc,etc,think its safe to say that it is definetely Chester zoo :D


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