The 0.5 W and + 10 dBm numbers in the specs don't work out.  +10 dBm is 10 mW.  
I suspect that the 1/2 watt is really the DC input power.

And, I'd agree about the range.  +10 dBm into a dipole at 10 meters gets you 
about -44 dBm at the receiver antenna in a free-space model.  That's really 
loud compared to the nominal -130 to -140 dBm you'd hear from the satellites.

-John

-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Magnus Danielson
Sent: Tuesday, October 02, 2012 4:02 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] GPS Jammer

On 10/02/2012 10:43 PM, J. Forster wrote:
> Take a look at the specs of this unit:
>
> http://www.mobilephonejammer.com.au/covert-gps-jammer-portable-p-119.html
>
> The Power Output is 0.5 Watts and it claims a jamming range of 1-10 Meters.
>
> Anybody think there is something wrong?

For a 500 mW jammer your jamming range should be much better. That's wrong.

Cheers,
Magnus

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