Theft from Car using Key Jammers

George_Michael

Marktheshark wrote: »

The device as we shall call it can be bought on e-bay for £25 and will prevent 95% of cars locking and also opening from up to 1 mile away.

Are you sure about that?
The power needed to block an RF signal from 1 mile away would be immense especially if the transmitter was omni-directional.

Johno100

George_Michael wrote: »

Are you sure about that?
The power needed to block an RF signal from 1 mile away would be immense especially if the transmitter was omni-directional.

Nobody is ever sure of anything Marktheshark says. If you've been here long enough you'll know to ignore or at the very least take it with a large mound of salt.

Herzlos

Marktheshark wrote: »

The device as we shall call it can be bought on e-bay for £25 and will prevent 95% of cars locking and also opening from up to 1 mile away.

That'd mean no-one would ever be able to lock their cars in any public car park. Plus the power would be incredible.

If you'd said the device can prevent 10% of cars of locking from up to 10ft away, I'd believe you.

shaun_from_Africa

About 9 years ago, I was employed on a contract where I was working inside a military hangar in North Africa and as with many similar places, they were totally paranoid.
Mobile phones were totally prohibited and this was partly enforced by the use of a mobile phone jammer placed in the building.

This jammer had a book range of 100m but in reality was more like 40-50m. It was mains powered, the size of 3 housebricks and weighed in at just under 8Kg and had an output of 70W.

Due to the signal loss over distance, to get a signal blocker to jam a signal a mile away would need something in the high kilowatt range which is probably obtainable for a small fortune if you are in the CIA but not on ebay for £25!

Le_Kirk

Marktheshark wrote: »

Check the door is locked by trying a door handle or prepare to have your car riffled through.

Unfortunately with keyless cars, you cannot try the doors after you have locked the car because you have the key in your pocket and the car assumes you want to get back in.

Nasqueron

shaun_from_Africa wrote: »

About 9 years ago, I was employed on a contract where I was working inside a military hangar in North Africa and as with many similar places, they were totally paranoid.
Mobile phones were totally prohibited and this was partly enforced by the use of a mobile phone jammer placed in the building.

This jammer had a book range of 100m but in reality was more like 40-50m. It was mains powered, the size of 3 housebricks and weighed in at just under 8Kg and had an output of 70W.

Due to the signal loss over distance, to get a signal blocker to jam a signal a mile away would need something in the high kilowatt range which is probably obtainable for a small fortune if you are in the CIA but not on ebay for £25!

Off topic (and I believe they are illegal in the UK?) but it'd be a nice sideline job installing these in cinemas (or even sneaking one in)

interstellaflyer

Le_Kirk wrote: »

Unfortunately with keyless cars, you cannot try the doors after you have locked the car because you have the key in your pocket and the car assumes you want to get back in.

Actually at least some keyless systems still require you to push a button to lock/unlock it's just the key needs to be within a certain range ie in the car somewhere to start the engine. I would think it would very poor security to make a car that locks/unlocks without any interaction from the key holder.

AndyMc.....

interstellaflyer wrote: »

Actually at least some keyless systems still require you to push a button to lock/unlock it's just the key needs to be within a certain range ie in the car somewhere to start the engine. I would think it would very poor security to make a car that locks/unlocks without any interaction from the key holder.

Unfortunately the car doesn't know who is trying to open the door. If the key is in range when the handle is operated the door opens. Similarly it locks when you walk away from it.

Johno100

Le_Kirk wrote: »

Unfortunately with keyless cars, you cannot try the doors after you have locked the car because you have the key in your pocket and the car assumes you want to get back in.

With my Ford you get a few seconds after you have deadlocked the car either with the remote or as I usually do with the button on the door handle to check the door is locked and walk away or re-enter the vehicle.

MEM62

I am struggling to accept that the Police would not be interested. The service area will have CCTV and they would be likely to get a result if they investigated.