Radar mast pole height

[jimbo2010]

I have a 2kw 18" dome, trying to figure the height off the deck or cockpit sole it has a 25 deg vertical bandwidth,

So it would have a 12.5 D downward beam, will the height above the boom matter?

I know it needs to be above my head but I don't want to use a taller pole than needed.

I also saw the dome can be tilted up 5 deg with no effect?

[Greybarn]

We set the radar mast height so that the lower edge of the beam can't hit anyone within 6 feet.

[jimbo2010]

Any basis for the 6' parameter?

[Greybarn]

Its based on manufacturers recommendations.... We actually push it out a little farther than that just to keep from frying someones brain....

[cthippo]

Still waiting to see that happen.

I've only heard of one case of someone getting cooked by non-ionizing radiation and that was at a lot more than 2 Kw

[jimbo2010]

Originally Posted by Greybarn

We set the radar mast height so that the lower edge of the beam can't hit anyone within 6 feet.

My question is if you say 6' for 2kw how many feet for 4kw etc.

Is there anything you can cite as a reference please?

Take a 6 ft high wooden pole , attach a simple plastic protractor ( Available in the school kids section of walmart) to the top


Hold the pole at the Bow of the boat and at the stern and pull a 12.5 degree sightline or use a string to another pole held up where you want to mount the radar.

Easy inexpensive and No Guessing. Just mark the RADAR pole with a pensil or crayon and make your radar mount that hieght.

heres a BONUS! If you make the Radar Mast with a spot to mount a 3 ft copper rod sticking straight up and connect a #4 or larger copper strand cable to a bronze dissapation plate on the bottom of your hull you will have a lightning rod that will protect your boat and all its electronics.

And it looks realy Cool to boot!

[wardd]

Originally Posted by WickedGood

Take a 6 ft high wooden pole , attach a simple plastic protractor ( Available in the school kids section of walmart) to the top


Hold the pole at the Bow of the boat and at the stern and pull a 12.5 degree sightline or use a string to another pole held up where you want to mount the radar.

Easy inexpensive and No Guessing. Just mark the RADAR pole with a pensil or crayon and make your radar mount that hieght.

heres a BONUS! If you make the Radar Mast with a spot to mount a 3 ft copper rod sticking straight up and connect a #4 or larger copper strand cable to a bronze dissapation plate on the bottom of your hull you will have a lightning rod that will protect your boat and all its electronics.

And it looks realy Cool to boot!

trig and a tape measure?

[daiquiri]

Originally Posted by jimbo2010

My question is if you say 6' for 2kw how many feet for 4kw etc.
Is there anything you can cite as a reference please?

Take a look here: http://www.plastimo.com/pdf/navman_r..._manual_uk.pdf
Page 6, and then pages from 11 to 15.
Cheers!

No Need to trouble your Brain with Complicated Trigonometry, Slide Rules and Plum Bobs.

Just pull a string. It ususlly pulls straight and is rather inexpensive and you can trudss up theThanksgiving Turkey with it when your done, and then get to use it again to string up your pole beans.

Just be sure to mount your RADAR Pointing North when you install it. for that your gonna need a Compass. Be sure to get one with numbers on it rather than just letters. And if your South of the MAson/ Dixon line keep in mind that your still gonna have to enter N for Lattitude no matter how bad you feel about it.


Stay Tuned and Ill learn yall how to install SatNAV

[tom28571]

Nice drawings but they are not very reasonable for mounting a radar on a pole at the stern. Just look around and you will see that they are high enough to not give any issue with people banging into them and the beam is clear of those in the cockpit or near the stern. A too high pole gives problems with bracing for stability. The KW rating is instantaneous power of the pulse which, for a short range RADAR is way less than a microsecond, so average or RMS power is very small.

You don't want to mount the thing by your head at eye level but the occasional bursts to someone on the bow is not a problem. Because of the spread of the beam width, power goes down exponentially with distance. That is how the 6' distance comes in. The Mfg figures that at that distance, the power density is low enough not to be a health problem.

I guess we need to have something to scare us. It's bedbugs turn now so the little RADARS will have to wait in line with cell phones.

Another Good Invention is the Radiation dribble shield.

Its a little know fact that the US Govt has been experimenting with these high technolgy barriers to effetvetivly block radiation

Here are some 3 million dollar proto-types being analyized.







Ill get you a WickedGood Deal on some. Just $39.95 each plus S& H

( May have blueberry or Cherry residew on them, but it wont affect operation)


As SEEN ON TV!

[gonzo]

I don't know about your head, but make sure they are above your testicles.

[jimbo2010]

Originally Posted by daiquiri

Take a look here: http://www.plastimo.com/pdf/navman_r..._manual_uk.pdf
Page 6, and then pages from 11 to 15.
Cheers!

That was a very good link link thanks

Originally Posted by tom28571

Nice drawings but they are not very reasonable for mounting a radar on a pole at the stern. Just look around and you will see that they are high enough to not give any issue with people banging into them and the beam is clear of those in the cockpit or near the stern. A too high pole gives problems with bracing for stability. The KW rating is instantaneous power of the pulse which, for a short range RADAR is way less than a microsecond, so average or RMS power is very small.

You don't want to mount the thing by your head at eye level but the occasional bursts to someone on the bow is not a problem. Because of the spread of the beam width, power goes down exponentially with distance. That is how the 6' distance comes in. The Mfg figures that at that distance, the power density is low enough not to be a health problem.

I guess we need to have something to scare us. It's bedbugs turn now so the little RADARS will have to wait in line with cell phones.

Thanks for the explaination