173.400

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173.400

Postby Throbber » Sun Sep 24, 2017 8:48 am

Hi guys/girls,

Did some experimenting with a dipole other day for my Realistic 2006 and picked up a signal on 173.400.
Having listened for a while i suddenly realised it was a teacher doing a music lesson.
The broadcast went on for hours until around 15.00 hrs.
Now there are several schools in my area and being a Governor at one of them for many many years, started to get a bit concerned Had some paedophile planted a transmitter in one of our classrooms ?, my mind went into overdrive !.
Some research on web showed that some aids for people with hearing difficulties actually transmits on 173.400, and at our school we have a teacher who has hearing difficulties.
OK quite a sensitive subject so bear with me, what can i do (As a Governor at this school) to block these transmissions ?, approach the teacher to check it's her device, install some kind of "Blocking device" in the school.
My concerns are simply this, what goes on inside a school building is NOT for human consumption, quite frankly it is a matter of privacy for the children and teacher, can you imagine some paedophile listening or even recording hours of chat by little kids, no, neither can I.

Any help you can give will be greatly accepted

Throbber

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Re: 173.400

Postby G4RMT » Sun Sep 24, 2017 9:07 am

Old radio microphone system. Nothing abnormal about it, and while the frequency indicates the age, that band is set aside for this purpose. I've still got 6 channels in a rack in use myself.

The reality is that yes, it's listenable outside for a short range - and the power output is less than 50mW, so distance is quite short. Your safeguarding policy should prevent this, but ignorance in schools is so common. Loads use PMR446 for their radios, and loads of people listen in, picking up the names and sometimes even addresses of troubled or naughty kid, parents phone numbers and all sorts of things the public should not know. As a supply teacher occasionally I find the ignorance amazing.
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Re: 173.400

Postby m0lsx » Sun Sep 24, 2017 10:06 am

G4RMT wrote: Loads use PMR446 for their radios, and loads of people listen in, picking up the names and sometimes even addresses of troubled or naughty kid, parents phone numbers and all sorts of things the public should not know. As a supply teacher occasionally I find the ignorance amazing.


My wife who is also a amateur, saw someone at a school use a pupils full name over a radio & pulled them up over it. They knew they could hear others but had never thought about others hearing them. And this was a teacher, someone who supposedly has a reasonable IQ:shocker: :shocker:
I emailed the County Education department & asked for a copy of their child protection policy & their policy on radio use & said why. I was contacted by phone & I explained why I was asking & the risks they put themselves at. Data & child protection for example. I pointed out they have a legal duty to provide guidance regarding radio use & why they need to have it & why it needs to be drafted by someone who understands radio.
I ended up receiving a long letter in response. One of the counties IT guys is licensed & they have drawn up a policy which will be sent to schools. The County has no legal right to enforces the advice. But now each school in the County knows it is individually responsible for ensuring they use best practice & cannot claim ignorance or excuse themselves from best practice.
What I would advise you to do Throbber is contact your County education department & ask what their policy is & what advice they give to schools regarding the use of radios. Also say why they need people who understand radio properly to help formulate this. They would not get someone who was IT illiterate to devise their IT policy & RF does not stop at their gate & puts them at risk of some VERY heavy fines if they breech data or child protection law, which they are.
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Re: 173.400

Postby Minus1 » Sun Sep 24, 2017 1:39 pm

I think you just need to stop being so paranoid. There is too much hysteria in this world, and too little common sense.
I reserve the right to ignore people who have made no attempt to the read the manual, and expect others to do it for them.
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Re: 173.400

Postby G4RMT » Sun Sep 24, 2017 3:10 pm

One school recently installed a cell phone jammer, and got into serious trouble with OFCOM, and the Local Authority for installing equipment illegal to use, own and import - and jamming cellphones, because of the 999 service, is considered rather serious.

If you have a loop system receiver for testing them, it's amazing how many places leave them turned on all the time - and even more fun in places like dentists and shops where you can hear all their private chat!

Personally - I find the notion that there is a potential or actual sec offender hidden under every bush quite worrying. Surely we all feel the disgust and anger when these things are uncovered, but we are in danger of considering everyone a potential sex offender, and preventing all sorts of issues.

I can't imagine a teacher with hearing difficulties using a radio system in this way. They'd have to wear an ear piece, when they probably already have much better hearing aids. A central microphone connected to a wireless system is rather a bizarre way of improving their ability to hear the kids, and any system would have to be very obvious in the room, so kids being kids, hey'd have spotted it anyway. Of course, it could be a surveillance system installed to eavesdrop on the class - maybe the head?
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Re: 173.400

Postby Minus1 » Sun Sep 24, 2017 4:17 pm

I remember the time, a few years ago, when the press were inciting paedophile hysteria as they often do, that led to a bunch of moronic idots attacking a female paediatrician who was attending her patients, because they thought paediatrician meant the same thing… :rolleyes:
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Re: 173.400

Postby m0lsx » Sun Sep 24, 2017 6:15 pm

The issues go beyond who is listening.
I use to work as a residential Social Worker & our children were subject to various court orders & differing restrictions. A school would be in breech of some orders if they made the presence of certain childrens known. And simply giving a christian & surname out over a radio would be all it would take for someone to be held legally accountable.
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Re: 173.400

Postby spaggy » Sun Sep 24, 2017 7:33 pm

Having established which is the school concerned, I think the sensible thing to do would be to inform the head of school who naturally would assume responsibility for investigation and action. Important to act but no over react,
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Re: 173.400

Postby m0lsx » Sun Sep 24, 2017 9:51 pm

Given the Radio Telegraphy Act (2006) I would take great care how I approached anyone about a specific use of radio. Hence why I approached the County Council & asked what policies they had.
Listening to anything not intended for our ears involves us breaking two laws.
https://www.ofcom.org.uk/__data/assets/pdf_file/0027/89037/Guidance-on-Receive-Only-Radio-Scanners.pdf
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Re: 173.400

Postby Throbber » Mon Sep 25, 2017 11:28 am

Thanks for the replies guys.
Minus1, trust me dude, I am not paranoid, it struck me that given the simpleton I am, if could build an antenna capable of receiving this transmission then anyone, including a Paedophile could.
My interests lay completely with the the safety of our kids and staff at the school.

M0lsx, thanks for that info, i will contact our LA and find out their views on the subject, i doubt if they are even aware of this matter given their current attitude to education and the current cuts we are undergoing, but i'll give it a go.

Monday 25th Sept, So a quick update, one of our staff is profoundly death and uses specialist equipment (basically an implant) to be able to interact with the kids.
Understandably it is going to be difficult to talk to this member of staff in regard to her equipment let alone suggesting that she is transmitting the data out into the local area.
The Head and I do not even know if it is actually her equipment that is being "leaked out" so we have checked in the other schools to determine if they use any kind of broadcast equipment

I'll keep you informed

Throbber

Realistic PRO 2006
Uniden UBC 355CLT
Realistic DX 300
DVB -T 820T2
QYT KT-7900D Quad Band
CRT SS9900
Baefong UV5
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