Radio Scanners

[defizr]

I'd better get a toothbrush packed then

[magpienja]

I have 3 all realistic...remember Tandy,

Anyway the last one I bought was a handheld the other 2 are base stations,

Got the handheld on ebay for under £20 over 10 years ago...still works treat,

Been listening to airband since I was a kid of 13...I'm now 60...never had a prob...just need to be discrete,

I found all my years of airband listening a great help in my use of the VHF in my microlight and getting the operating license for it.

[Bye]

this is the traditional loophole.

The law does not prevent you from using a device to detect the presence of signals / transmissions.

The law prevents you from using wireless telegraphy apparatus with INTENT to obtain information as to the contents, sender or addressee.

so if you are using the apparatus for the detection of signals say for DF work and you accidentally overhear stuff you are not breaking the law.

Then of course Offence 2 steps in to prevent anything you accidentally overhear from being repeated.

so the defence goes something like, " i was using my scanner to detect if their was the presence of radio transmissions in this vicinity, and it stopped on a frequency and i accidentally overheard stuff which i have kept to myself honest your Honour".

GB

[Out Of Trim]

My old Yupiteru MVT7100, Once the Rolls Royce of scanners still works great!

[SawMan]

I listen with a few different Ham rigs. With two of them I have to be very careful to not touch the PTT as I don't want to interfere with anyone's day On a good day at home, I can listen to 5 different airports, and I can hear ground ops and ATIS from 2 of them. For those with a shortwave set, you might find international over-ocean air traffic interesting too (if you can stand the static) and don't forget Military ops. Keep 121.5 MHz plugged in too- you never know what you'll find there but it WILL be interesting when you hear it.

[Brian Equator]

Evening all.

The Police say they will be round to arrest all scanner owners right after they've solved all the murders, robberies and burglaries.

[Evey_Hammond]

before the police arrive to arrest us can someone explain where 129.4200 has gone please?

[T6NL]

129.4200 does not exist as an aviation frequency (In actual fact, if it did exist, it would be just 129.420 as only a maximum of three decimal places are used for civil aviation R/T frequencies). The used frequencies are spaced at 8.3333333333 recurring kHz (0.0083333333333 recurring MHz), referred to 8.33 kHz for short. This gives 12 available channels per 0.1 MHz. As it is completely ridiculous to say ".........point 3333333 recurring" over the R/T, the frequencies are rounded to the nearest 5 kHz for ease and to reduce the chances of confusion. So referring to the question asked above, the adjacent channels would be:

Actual frequency R/T name

129.400 129.4 (the double zero is dropped for ease)
129.40833333 129.410
129.41666666 129.415
129.425 129.425
129.43333333 129.430
129.44166666 129.440
129.450 129.450

.........and so on. This is why 129.420 does not exist as an aviation R/T channel. Hope this answers your question.

T6

PS Can't get this to display in nice columns as it does when I type it in, but hope you get what I'm describing.

[DX Wombat]

(the double zero is dropped for ease)

No, it's 129.40 to clarify that you have not abbreviated 129.25, or 129.50 or 129.75 etc to a single figure.
Amateur radios in the UK have the transmit disabled on airband frequencies. I don't have a scanner but do have two radios for use on the amateur bands and one as a spare for use in an aircraft - this latter can be used to transmit on the airband frequencies. I also have my CAA licence as well as my amateur ones.

[Peter47]

If you are an ATCO in the UK not wishing to be eavesdropped on, fine, but don't go to work abroad as it appears to be legal in most countries. The liveatc.net site doesn't have any feeds from UK airports and says that's its because of the law. I am not aware of any other countries in the West with a similar law. I can legally listen to many ATC transmissions from abroad on the web but not UK ones on a radio.


Then again most countries have a few laws almost unique to themselves some quite logical.

[T6NL]

DX Wombat, you say:

"No, it's 129.40 to clarify that you have not abbreviated 129.25, or 129.50 or 129.75 etc to a single figure."

That is not correct in the UK. In CAP 413 (the CAA Radiotelephony Manual), Edition 21, it is clearly stated in para 2.15:

"All six figures shall be used when identifying frequencies irrespective of whether they are 25 kHz or 8.33 kHz spaced. Exceptionally, when the final two digits of the frequency are both zero, only the first four digits need be given."

As a holder of a CAA R/T licence, you should know this, and not be posting incorrect phraseology online. There is enough of it being used as it is.

The way of ascertaining that a .250 or .750 frequency has not been incorrectly abbreviated is by using all six digits, and ensuring that any readback contains all six digits and ends in a zero, as shown in the final example of my previous post.

I am not certain about the rest of the world, but my reply was to a poster with a stated location of England, so I quoted the UK rules.

[DX Wombat]

Sorry T6NL, I should have checked as I haven't used my radio licence recently and hadn't seen that amendment. It has changed since I did my exam. I'm also unlikely to be able to use it in the near future.

[ask26]

Hand-Held Transmitter

Looking to start with RC model flying but with the advent of drones etc I'd like the ability to broadcast a "for info" to the nearest ATC unit with information of my intended aerial activities as a responsible operator. Commercial pilot already so comfortable with ATC use.

But my Q is, aside from in-plane mounted transmitters, is there a legal hand-held 108-136AM transmitter which can be bought off the shelf. I'll also be contacting the CAA with this for get formal approval so will be all above board but this seems a good place to get someone's knowledge.

Thanks.

[magpienja]

I far as I know..the max alt for a RC model is 400ft....keep below that job done....and well outside the legal distance from an airfield,

RC model clubs have been in perfectly safe operation for donkeys years...normally at least one in every town...your best bet is join one of those,

A friend of mine is a member...been with him once...a very friendly lot.

Nick.

[HEATHROW DIRECTOR]

<<there a legal hand-held 108-136AM transmitter which can be bought off the shelf.>>

There are but why would you want one? You could only legally use it in an aircraft. Any other reason would require special authority.

[KBPsen]

A bit of a peculiar idea you have, ask26. As magpienja suggested you should join a club. They will have a field to fly from, maybe even with a small clubhouse. They will also have instructors. It might even be a requirement to take lessons when joining.

[superq7]

Re using radio scanners, back in 1968 when I used to go spotting a Lulsgate the satco there had a strong dislike for people listening in to the tower, anway one day while I was sitting down with my earphones in listening to radio one I was approached and questioned by two men apparently from the Post Office they had been sent by said satco he was most upset to find I wasn't tuned in to ATC.
Btw being interested in aircraft led to one of my mates becoming an air traffic controler and the other an airline pilot and me bottom of the pile a fitter at Bac Filton.

[magpienja]

I used to listen in way before the days of scanners...early 60s...seem to remember I got my first manual tuned radio from Volstaic London...think thats what they where called,

Had many many hours of fun listing into Liverpool and Preston Radar with that.

Own my own a/c now.

[Simtech]

Close - the company was Volstatic, one of the first suppliers of airband receivers in the UK.

[magpienja]

That was it Sim...used to advertise every month in Air Pictorial....I had many many hours of enjoyment with that radio and learned so much.