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Re: - Radar Detectors as receivers & test sources



Most radar detectors are FM.  So you would not be able to use it right out
of the box.  Also, the type of detector diodes used are not necessarily the
most sensitive and the local oscillators are not synthesized (meaning you'll
get some frequency drift).

73,

Jon
NA9D

on 11/26/00 11:59 PM, Ellis, Peter R. at Peter.Ellis@cbr.defence.gov.au
wrote:

> Does anyone have any experience with using X / K band radar detectors as (a)
> microwave receive converters and/or (b) signal sources (because they 'leak',
> don't they)?
> 
> * Radar detectors became illegal in cars and trucks in Australia about
> 6-8 years ago, and that means that people don't have them! It can be a VERY
> expensive mistake to use one! It will NEVER go in my car. So, occasionally,
> someone gives an old one to an electronic enthusiast or they go into 'garage
> sale' or 'white elephant sale'.
> 
> * My "radar detector" came from the 'white elephant sale' at my
> youngest son's school a few weeks ago (along with some other bits and pieces
> including some memory that will go into a Windoze 95 system that only has
> 32M at the moment...) The device is 'as new' in its original box.
> 
> * Physically, it is about 100mm deep (front-back), 150mm wide, 15-20mm
> thick. So... it COULD be mounted on a dish... but would need some weather
> protection.
> 
> * The antenna is behind a plastic cover and seems to be about half the
> front face (i.e. ~10-15mm high x ~80-100mm wide).
> 
> * Power is from a battery pack and/or 12V cigarette lighter plug and
> lead.
> 
> The box says...
> Make: Maxon Systems Inc.
> Model: RD-XL Microsize Radar Detector
> Freq:  10.525GHz X
> 24.150GHz K   
> Bandwidth: +/- 100MHz X/K
> Selectivity: >80dB @ 50MHz from band edge
> Receiver: Dual scanning superhet
> Detector Type: Freq scanning AM pulse and FM discriminator
> Signal Processor: CMOS digital, auto correlation
> 
> 
> AO-40 Downlink Frequencies...
> 3cm  10451.450 - 10451.750 MHz  10451.025 - 10451.275 MHz
> 1.5cm  24048.450 - 24048.750 MHz  24048.025 - 24048.275 MHz
> 
> AO-40 Telemetry
> 3cm  10451.000 MHz  10451.150 MHz  10451.400 MHz
> 1.5cm  24048.000 MHz  24048.150 MHz  24048.400 MHz
> 
> Therefore, with little imagination, I should be able to have my "AO-40
> Detector" do SOMETHING on both bands...
> 
> 
> So, just asking...
> Does anyone have any experience with using X / K band radar detectors as
> microwave receive converters, etc?
> 
> 
> Thanks,
> 
> Peter 
> VK1KEP
> 
> 
> ----
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-------------------------------------
Jon Ogden
NA9D (ex: KE9NA)

Member:  ARRL, AMSAT, DXCC, NRA

http://www.qsl.net/ke9na

"A life lived in fear is a life half lived."

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