Yeh, but as a pikey firend of mine tells me, nothing beats a steel container, so if they are pros then he's b*ggered!

G

PS usual discliamer- It was
only heresay guv

VHF goes through containers, I can assure you!

Reminds me of an article in the Telegraph from last month.
http://www.telegraph.co.uk/news/religion...tique-fair.html
I know its not PC but when you have the doors flung wide open---you have to expect some of the dross to turn up take advantage to try and empty the place---no doubt they have been massively disadvantaged in their earlier miserable lives. Best I end here as I am warming to the subject.

Any radio transmitter and aerial in a metal box will have it's range reduced dramatically. Hard to put a figure on it but I suspect what might go for 15 miles or more in open country might be struggling to go much more than 15 yards outside a metal box.

So yes, VHF does go through a container, but at such reduced strength, unless you are in the same yard, you'd be lucky to find it.

If there is, he drives this: -




Setting aside Morgans, imho, this is close to automotive perfection.

It's much more than 15 yards, a colleague and I once uncovered a stolen JCB inside an iso after the tracker set off from several hundred metres away. Promise!

Yes but it's not miles. Much over a few hundred yards and the signal will be sufficiently weak to vanish into the background noise. Put that container into a higher rf noise environment and you might not even find it at 15 yards.
Simple physics, which encompasses radio theory. Sorry, near 40 years in radio - both professional and hobby...
Have to say, finding that JCB was a lucky shot! Good one!

Simon: now that's a real classic 911
Cheers,

My figure of 15 yards was assuming a typically radio noisy urban environment. Should one find a low radio noise location the effective range will increase dramatically. 150 yards - yes I believe you, although I think you were lucky with either the location or the time you looked/listened.

Graham I think knows, but I am actually a UK radio amateur (G8UCP) and after university (BSc in Electrical Engineering) , spent 8 years fixing BBC radio and tv transmitters, followed by many more years answering and advising on all broadcast reception topics.