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#31
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"Ted B." > wrote in message eenews.net... > > >> We're talking about an off-ramp here. Generally the way it works is >> you glance at your speedometer while you are decelerating in the >> deceleration lane, verify that you have scrubbed off enough speed to >> enter the turn, > > You need a speedometer for that?!? C'mon . . . -Dave i'll admit that it helps for me... when cruising along at 75-80 MPH on the interstate, your speed perception sometimes gets a little skewed, especially when making a very sudden deceleration for an exit. 45 MPH can feel like you're crawling! and of course many exits are advised at much much less than that. brink |
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#32
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On Mon, 13 Jun 2005 15:35:25 +0000, Jim Yanik wrote:
> Got news for you;I'm an experienced electronic technician with microwave > training,experienced in use of spectrum analyzers and mW power measuring > meters,and have worked on HF electronics since I was a teenager. AND,I > know what a Gunn oscillator is,and how they work. As a technician you should really know how amateurs can mess electronic circuitry up. And that in HF circuitry even minute mistakes in both design and assembly can lead to quite unfriendly frequency spectrum characteristics. And that the oscillator is not the only part in a transmitter, that influences these characteristics. But as I said, you are driven by need to be right, not by an interest in the topic. Chris |
#33
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brink wrote:
> "Arif Khokar" > wrote in message > ... > >>Pat O'Connell wrote: >> >>>Arif Khokar wrote: >> >>>>A good driver knows how fast he's able to take a curve without the need >>>>of an advisory limit. All he needs to know is that there's a curve >>>>ahead and that it is constant radius. >> >>>AFAIK ramps are never marked as "constant radius." >> >>They don't have to be marked constant radius. Non-constant radius curves >>on ramps and highways are not frequently encountered and should be noted >>through yellow diamond signage. >> >>>>The last thing I'll look at while in a curve is what my speedometer >>>>says. >> >>>It's your funeral. >> >>So you're saying that I should ignore what's ahead of me in the curve as >>well as not pay attention to traffic on the road I'm planning to merge on >>and just look at my speedometer then? > > how long does it take most people to glance at their speedometer? i use it > as reference all the time when heading onto an offramp with a turn obscured > by a bridge, a grade, or darkness. i rekon i can see in a split second what > my current speed is as i decelerate, and i check that against the advisory > speed limit. If you just need an approximate idea, then your speed guage should be readible through peripheral vision. |
#34
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"C.H." > wrote in
news > On Mon, 13 Jun 2005 15:35:25 +0000, Jim Yanik wrote: > >> Got news for you;I'm an experienced electronic technician with >> microwave training,experienced in use of spectrum analyzers and mW >> power measuring meters,and have worked on HF electronics since I was >> a teenager. AND,I know what a Gunn oscillator is,and how they work. > > As a technician you should really know how amateurs can mess > electronic circuitry up. And that in HF circuitry even minute mistakes > in both design and assembly can lead to quite unfriendly frequency > spectrum characteristics. And that the oscillator is not the only part > in a transmitter, that influences these characteristics. > I see you still do not know what a Gunn oscillator is or how they work. If we were talking about other sorts of jammers on other frequency bands,you would be correct. > But as I said, you are driven by need to be right, not by an interest > in the topic. > > Chris > -- Jim Yanik jyanik at kua.net |
#35
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Bert Hyman > wrote in
: > (Sir Ray) wrote in > oups.com: > >> Didn't our favorite show, 'Mythbusters', recently do a segment on >> this and similar type of 'radar fooling' techniques (including >> shiny disks/spheres hanging from mirrors, aluminum foils, and >> radar-absorbant paints? >> Nothing seemed to work. > > Correction: Nothing ->legal seemed to work. > > It's technically quite straightforward to build active RF devices > which will defeat traffic RADAR. They're [probably] also illegal to > use. I qualify that statement with "probably" because I haven't > actually tried to find Federal law that definitely covers this, but I > can't imagine that the feds would leave this stone unturned. > > I don't know if anybody has researched devices for defeating LASER > speed measuring devices. > Lidatek has(had?) a working laser jammer on the market.There was an independent organization that tested them and found them to work. I believe there are not any Federal laws on laser jamming,but many States have laws on their books about them,usually something about interfering with law enforcement. The main problems with laser jamming are the narrow beamwidth and getting enough optical power to the laser gun to overcome their signal.The laser gun can have a narrow field-of-view to receive the reflected signal,but the jammer has to send a wide beam to insure some of the signal gets to the narrow view of the laser gun at whatever angle the speed gun is off the axis of your vehicle.The wide beam necessary reduces your effective output power to the speed gun. Jamming would also be more apparent to the speed gun operator. Then there are passive measures that can be used with laser speed guns;reducing the reflected pulses from your vehicle by darkening surfaces that would reflect them.Getting rid of any front plate would be the 1st step,then somehow shielding your headlights and front turnsignals would be #2. Then blackening any chrome or shiny surfaces. -- Jim Yanik jyanik at kua.net |
#36
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On Mon, 13 Jun 2005 22:36:14 +0000, Jim Yanik wrote:
> I see you still do not know what a Gunn oscillator is or how they work. If > we were talking about other sorts of jammers on other frequency bands,you > would be correct. And I see you still lack the understanding that the oscillator is not the only part that influences the HF characteristics of a transmitter. What you need to do is attend a few classes in HF electronics at your local university. There they will tell you why even sloppy workmanship and even more so amateur design can lead to very undesirable HF characteristics. I rather doubt that with your elite background as an electronics technician you will believe what a 'lowly' electrical engineer tells you, but I at least tried. Let's hope you at least dont manage to get someone killed with your illegal radar jammer experiments. Chris |
#37
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Arif Khokar wrote:
> > The Real Bev wrote: > > Most laws that prevent us from doing > > perfectly rational things were devised by and/or for people who are not > > capable of being rational. > > As always, people come up with unfounded reasons as to what they think > is the reasoning behind a given law. As I've posted before, most stop > signs could be replaced by yield signs. In Europe, stops signs are > relatively rare. > > It would make much more sense to not issue a license to people who > cannot act rationally. But then they could sue for discrimination. -- Cheers, Bev ------------------------------------------------------------------- "We need to cut more slack for the stupid; after all, somebody has to populate the lower part of the bell curve." -- Dennis (evil) |
#38
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"C.H." > wrote in
news > On Mon, 13 Jun 2005 22:36:14 +0000, Jim Yanik wrote: > >> I see you still do not know what a Gunn oscillator is or how they >> work. If we were talking about other sorts of jammers on other >> frequency bands,you would be correct. > > And I see you still lack the understanding that the oscillator is not > the only part that influences the HF characteristics of a transmitter. > What you need to do is attend a few classes in HF electronics at your > local university. There they will tell you why even sloppy workmanship > and even more so amateur design can lead to very undesirable HF > characteristics. WRT general HF circuitry,you are correct. But since you lack the understanding of microwave circuitry or Gunn oscillators,in that specific case you are wrong. > > I rather doubt that with your elite background as an electronics > technician you will believe what a 'lowly' electrical engineer tells > you, but I at least tried. Let's hope you at least dont manage to get > someone killed with your illegal radar jammer experiments. > > Chris -- Jim Yanik jyanik at kua.net |
#39
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On Tue, 14 Jun 2005 12:46:25 +0000, Jim Yanik wrote:
> WRT general HF circuitry,you are correct. But since you lack the > understanding of microwave circuitry or Gunn oscillators,in that specific > case you are wrong. Hm, another typical technician. Thinks he knows everything and if someone, even an engineer, doesn't bow to his superior knowledge he starts throwing insults at random. Sorry, Jim, I am not interested in a mudslinging contest, so for me its EOT here. Chris |
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