As far as I know all the leakage is coming from the diode. This is due to a single mixer step that is used. Which means that to detect a 14Ghz signal you need a 14Ghz tone to allow you to mix down to DC levels. As there is only one 14Ghz mixing circuit then the police can detect your 14GHz signal. To stop this you would need to use a multistage mixer. You can get tuned microwave power meters which will allow you measure the output on the frequencies they monitor. Any RF test equipment shop can help you with this.
-----Original Message-----
From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]]
Sent: 06/02/2002 12:50
To: [EMAIL PROTECTED]
Subject: Re: Radar detectors - Magnum help!!
Ozdatters,
I am sure there are some electronics whizzes on this list.
Firstly, radar detectors aren't a licence to speed. They just even the odds a bit, especially if you do a lot of driving.
You can still get done by lasers and fixed cameras and anyway the signal from slant radar is very weak.
They really only help avoiding Patrol cars.
I have some questions regarding modifying radar detectors to be un-detectable.
The Police radar-detector Detectors work by picking up the characteristic RF leakage from the Radar Detector.
If the Detector was in a metal box that was grounded to the chassis with, say, cooper braid, would this eliminate the RF leakage?
The wave guide is made of die-cast steel I think.
Is there any RF leakage from the Gunn diode in the wave guide?
If not, then all the circuitry is enclosed in a metal box grounded to the chassis.
How do you go about testing the modifications before you take it out on the street?
Regards,
Nick
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