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- Newsgroups: sci.electronics
- Path: sparky!uunet!das.wang.com!wang!dbushong
- From: dbushong@wang.com (Dave Bushong)
- Subject: Re: Radar detectors
- Organization: Wang Labs, Lowell MA, USA
- Date: Thu, 30 Jul 92 13:50:40 GMT
- Message-ID: <bs7fsh.e40@wang.com>
- References: <1992Jul28.164032.854@yvax.byu.edu> <bs5e8t.1na@wang.com> <1992Jul29.174259.27794@ll.mit.edu>
- Lines: 87
-
- tcs@ll.mit.edu (Tom Sefranek) writes:
-
- >|>
- >|>
- >|> >I heard about a device that would 'confuse' radars making them think
- >|> >that the car is going at lower speed; does anyone know anything about
- >|> >this?.
- >|>
- >|> There was a gadget on the market briefly around 10 years ago that
- >|> did this - it transmitted a modulated 10.525 GHz signal with the
- >|> modulation freq set by a knob calibrated in MPH (jeeze!) but later
- >|> produced with the calibration in Hz. It required a ham radio license
- >|> to operate it. I haven't seen this thing on the market in a long time.
- >|>
- >|> There was an article in one of the hobby electronics magazines (Pop. Elec.,
- >|> etc.) at roughly the same time that used a coffee can as the cavity,
- >|> and passively reflected the radar signal with some new modulation on
- >|> top of it (that is, any speed you select).
- >|>
- >|> I wish I had more details about issue number, manufacturers, etc., but
- >|> you might try one of those online magazine database services and look
- >|> for some of the keywords that would apply.
- >|>
- >|> Hope this helps!
- >|>
- >|> Dave
- >|>
- >|> --
- >|> ==========================================================================
- >|> Dave Bushong, KZ1O@K1UGM.MA + No .sig, no tattoo,
- >|> Wang Laboratories, Inc. + no bald spot, no nothin!!
- >|> Internet: dbushong@wang.com +-------------------------------------
- >|> Project leader, OCR Products + (reserved for future expansion)
-
-
- >Dave,
- > Ask a ham, there are severaly at Wang. Your posting linking the HAM
- >band 10 ghz with radar is BOGUS!!! We don't do pulse mode, we don't do 10.525G.
- >And we certainly wouldn't be involved with defeating the police radar.
-
- >Come join us, don't guess!
-
- >Tom
- >--
- >--------------------------------------------------------------------------------
- > /-/-/-/-/ | VE Sessions every Sunday 15:00 EST
- > /-/-/-/-/ /---/---/ @ Navy Barracks @ Fort Devens, Ma. &
- > | x | Second & Fourth Mondays of the month.
- > /--/--/ x /---/---/ @ Lura A. White School Shirley, Ma.
- > x . x x E-Mail or call 617-981-3474 (Work)
- > x | x x Call in: 145.41, 145.45, 448.625 Mhz.
- > x | __x x
- > x_______|_______||x x Ham Radio (Elmer) Night @ 19:00 EST
- > / ||x\ / \ First, Third, (Fifth) Mondays.
- > /-----------------/||x \ /___ ___\ Thomas C. J. Sefranek WA1RHP
- > | [ ] [ ] ## [ ]| ||x | || | | || 112 Great Road Shirley, Ma. 01464
- > | ## | ||x | || | | || Home Phone: 508-425-6672
- >--------------------------------------------------------------------------------
-
- Tom,
-
- I don't know why you posted a followup for the net to see, but I'll
- respond in kind.
-
- Let's see... I know "severaly" of the hams at Wang; I'm one of them;
- there is a ham band at 10 GHz; there are hams that break various
- laws (I try to not be one of those, though); and I was just answering
- a question, not trying to cast a moral judgement on the poster. Police
- radar does not use pulse, it's CW (doppler) and mixes the transmitter
- with the receive signal yielding a beat frequency of 31.4 Hz per
- mile-per-hour at 10.525 GHz. Hams use radar detectors to make
- contacts on Field Day for extra points, since the 10.0 to 10.5 GHz
- ham band is close enough in frequency.
-
- By the way, who is "us" and why would I want to join you?
-
- My reply was factual, and I stand by it.
-
- Dave
- Amateur radio station KZ1O
- Licensed since 1967 at age 12
- --
- ==========================================================================
- Dave Bushong, KZ1O@K1UGM.MA + No .sig, no tattoo,
- Wang Laboratories, Inc. + no bald spot, no nothin!!
- Internet: dbushong@wang.com +-------------------------------------
- Project leader, OCR Products + (reserved for future expansion)
-