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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxn!ihnp4!inuxc!pur-ee!uiucdcs!convex!techsup!mikey
From: mikey@techsup
Newsgroups: net.auto
Subject: Re: radar detectors
Message-ID: <-39614483@techsup>
Date: Wed, 20-Nov-85 17:11:00 EST
Article-I.D.: techsup.-39614483
Posted: Wed Nov 20 17:11:00 1985
Date-Received: Sun, 24-Nov-85 06:05:33 EST
References: <130@necis.UUCP>
Lines: 29
Nf-ID: #R:necis.UUCP:130:techsup:-39614483:000:1389
Nf-From: techsup!mikey    Nov 20 16:11:00 1985




> A radar detector is a transmitter as well as a reciever, just like your
> FM radio. It generates a signal of the same frequency internally and 
> compares it to the incomming signal from o'll smokey. A radio does the same
> thing. That is why cheap radar detecters like radio shack models set off
> other models. If someone has a sensitive reciever they can detect your
> detector.


Don't blame Radio Shack, blame any of the single conversion units.  Radio
Shack doesn't even sell a single conversion unit anymore.  All the units
that are superhet are either dual or tripple conversion.  The el-cheapo
unit is a simple diode detector.  Dual and tripple conversion have the
advantage of the oscillators not being in the band your trying to detect,
hence that won't trigger other 'good' detectors as you drive down the
highway.  Also, the detectors sweep the band from one end to the other
without loosing much sensitivity.  The diode detectors also radiate,
but not as bad as some of the first superhets.

The worst offender of the transmitter detectors was the autotronics,
which was sold by Radio Shack as well as a host of other sources, but it
was also one of the more sensitive units to come along until the Cincinatti 
microwave stuff kicked everybody in the can and opened up a whole new 
market.  Don't blame the shack, they just sell what people want.

mikey at bbimg
N1DVJ