"david" wrote in
:

Can anyone help I bought the radar second hand and I don't know how to
use it
has anyone got a manual in pdf format please
David in perth




http://www.marineelectronicshoppe.co...RC/Default.htm
$US20 too much?

http://www.jrc.co.jp/eng/product/mar...ar1000_outline
..html

Ask 'em for a manual...
http://www.jrc.co.jp/eng/product/mar...iry/index.html
Yours fell overboard, right??...(c;

Nice little radar for NEAR objects, where it counts. Mount it LOW down,
not way up high trying to see targets 16 miles away. If it's 12' off the
deck, it'll show you that bouy in the fog nearly right up until you run
over it! Way up high, it'll overshoot the bouy at the worst time....when
you're close!

On Mon, 28 Mar 2005 08:15:54 -0800, "david"
wrote:

Can anyone help I bought the radar second hand and I don't know how to use
it
has anyone got a manual in pdf format please
David in perth

I did a google for "jrc radar manual" and the first hit was
http://www.marineelectronicshoppe.co...RC/Default.htm, who has
copies for sale, for US$20

If you go to http://www.jrcamerica.com, and look for "light
marine/Radar, you will find the Radar 1000 Mk II listed, and the
manual is available there for download. Don't know if that will be
the exact manual for your unit, but it may be close enough - otherwise
you could email them for information.


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
new newsgroup users info : http://vancouver-webpages.com/nnq
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

Larry,
That is an astute observation. In fact, in the Netherlands, a regulation was
recently passed that all the commercial shipping must have radars that work
between 0 and 100 meters by the end of '06. This will be a big problem
because most of the existing commercial radars and their mounting will not
see close targets. However, the vertical fan of most antennas is 30 degrees,
so mounting isn't the biggest problem. The biggest issue is pulse width and
electronics speed. At 6.36usec per radar mile, the pulse width must be less
than 1usec and the receiver must be on within nano seconds after the pulse
transmission in order to sense a close target.
Steve

"Larry W4CSC" wrote in message
...
"david" wrote in
:

Can anyone help I bought the radar second hand and I don't know how to
use it
has anyone got a manual in pdf format please
David in perth




http://www.marineelectronicshoppe.co...RC/Default.htm
$US20 too much?

http://www.jrc.co.jp/eng/product/mar...ar1000_outline
.html

Ask 'em for a manual...
http://www.jrc.co.jp/eng/product/mar...iry/index.html
Yours fell overboard, right??...(c;

Nice little radar for NEAR objects, where it counts. Mount it LOW down,
not way up high trying to see targets 16 miles away. If it's 12' off the
deck, it'll show you that bouy in the fog nearly right up until you run
over it! Way up high, it'll overshoot the bouy at the worst time....when
you're close!

"Steve Lusardi" wrote in
:

At 6.36usec per radar mile, the pulse width must be less
than 1usec and the receiver must be on within nano seconds after the
pulse transmission in order to sense a close target.
Steve


The little 2KW Raymarine can see the docks three slips away from about 22'
up Lionheart's mizzen. It draws so little DC power its pulse width has to
be very narrow, indeed. I know of someone else who regrets putting the
radar atop the mast at 55' on a sloop because the bouys disappear about a
football field length away from the boat with the same radar.

This observation of the Raymarine 2KW is taken when the radar is new, not
after the internal condensation problems of Raymarine radomes has eaten
away the potmetal chassis, rendering it useless. I just put the third
radome up the mizzen.

By the way, for the Raymarine 2KW owners, the new radome has these little
plastic feet to hold the radome up off the mounting by about 1/2 inch. The
mounting bolts go through a hole in these feet. Looks like a patch for the
problem of stainless steel bolts and pot metal holes they screw into making
another galvanic battery to eat the chassis off from the bottom.

JRC radar1000 manual
 

Can anyone help I bought the radar second hand and I don't know how to use
it
has anyone got a manual in pdf format please
David in perth

On Sun, 27 Mar 2005 20:21:30 -0500, Larry W4CSC
wrote:


Nice little radar for NEAR objects, where it counts. Mount it LOW down,
not way up high trying to see targets 16 miles away. If it's 12' off the
deck, it'll show you that bouy in the fog nearly right up until you run
over it! Way up high, it'll overshoot the bouy at the worst time....when
you're close!



I have a JRC 1000. I use it the most for anchiring. It shows the other
boats in the anchorage down to less then 1/16 of a mile. You can make
sure there is a couple of hundred feet all around very easily.


Jeannette
aa6jh
Bristol 32, San Francisco
http://www.eblw.com/contepartiro/contepartiro.html

On Mon, 28 Mar 2005 05:12:28 -0500, Larry W4CSC wrote:


By the way, for the Raymarine 2KW owners, the new radome has these little
plastic feet to hold the radome up off the mounting by about 1/2 inch. The
mounting bolts go through a hole in these feet. Looks like a patch for the
problem of stainless steel bolts and pot metal holes they screw into making
another galvanic battery to eat the chassis off from the bottom.

Larry,
Do you think threaded nylon stand-offs with 1/4-20 nylon bolts
solve the problem?
Norm B

WaIIy wrote in
:

I know you don't like this particular pot metal assembly, but why are
you on your third rather than switch to another brand?

Just curious.



Oh, they keep replacing them under warranty.....

I don't see how they're making a profit building them this way and handing
them out for free.....

engsol wrote in
:

Larry,
Do you think threaded nylon stand-offs with 1/4-20 nylon bolts
solve the problem?
Norm B



Not at all. The condensation problems stem from the dome being open to the
air and exposed to the sun in a high humidity environment. It works the
same as a nearly-empty gas tank sucking in cold, wet night air when the sun
sets to condense inside all night and run down the walls, then blow air out
the little rubber tit at the bottom of the radome when the sun comes up,
boiling off what water it can in the heat of the day to create its own
rainstorm inside the OPEN pot metal chassis to eat away at the electronics
until the sun sets, again, to repeat the process.

The problem is not the bottom mounting, the problem is the "gas tank
effect" creating saturated hot air inside the dome because it's cheap to
make an unsealed dome that doesn't have to withstand a few pounds of
pressure......

Some of the older Raymarine radars used the same internals as JRC, but I
have not seen a cross reference for model numbers, just parts. Raymarine
does have several of their older manuals available for download from their
web site, so if there is an equivalent, and you can find out what it is, you
might find some help there.

"david" wrote in message
...
Can anyone help I bought the radar second hand and I don't know how to use
it
has anyone got a manual in pdf format please
David in perth

"david" wrote in
:

it was good to see no negative comments about the JRC1000.
David


They're just hiding their true feelings....(c;

Thankyou all for your help and advice a kind reader has sent me the manual
and I will mount it low as suggested.
it was good to see no negative comments about the JRC1000.
David

"david" wrote in message
...
Thankyou all for your help and advice a kind reader has sent me the manual
and I will mount it low as suggested.
it was good to see no negative comments about the JRC1000.
David


Several people have complained about the noise that the smaller JRC, Furuno,
etc., radars make when mounted directly on top of a thin fiberglass or metal
cabin roof. The roof/overhead tends to act as a acoustic diaphragm, making
the cabin noisy from drive motor/gear operation. The quick fix in most cases
is a very small amount of grease on the motor gear/ring gear teeth. Some
motors are shock mounted in rubber grommets, and permit loosening the
mounting bolt and tiny adjustment of the motor position can be done,
changing the depth of the gear teeth mesh, until a quiet point is found.
Possibly remounting the scanner dome on rubber or plastic washers would
reduce the noise also. Raymarine tends to use belt drive, so drive noise is
usually not a problem.
73
Doug K7ABX