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Old June 3rd 09, 11:29 PM posted to rec.boats.cruising
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Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19 PRF and RMS power

http://www.radartutorial.eu/18.expla...s/ex28.en.html
This site explains it better than I can.

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Old June 4th 09, 12:51 AM posted to rec.boats.cruising
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Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19

On Wed, 3 Jun 2009 16:00:34 -0400, "Wilbur Hubbard"
wrote:

wrote in message
.. .
On Tue, 2 Jun 2009 21:22:28 -0400, "Wilbur Hubbard"
wrote:

"Wayne.B" wrote in message
...
On Tue, 2 Jun 2009 20:25:27 -0400, "Wilbur Hubbard"
wrote:

Real sailors won't abide radar.

Bull




Not bull! Fact!

If you run radar you are motoring because the damned things draw so much
power. Since you're motoring you are no sailor.


False.

My RADAR draws slightly over 2.1 amps MAX. Over 10 hours of normal
use, it draws an average of about 1/4 to 1/2 amp, or 3 - 5 amp hours
in a 10 hour day. It is really even be less than that. I have a
dedicated AGM battery for just the RADAR and a small 20 watt solar
panel has no trouble keeping it fully charged regardless of how much I
use the RADAR.



LIAR! Volts X Amps = Watts.

So if your unit draws 2 amps that means your unit has a puny 24 or so watt
output provided it it 100 percent efficient which it is NOT. Hell, a VHF
radio outputs at 25 watts and it has no moving parts.

That means your pitiful 2.1 amp radar is good for a range of maybe a 1/10
mile. Waste of time and space, dude! Freaking TOY!

Here's a link to a compact yacht radar:
http://www.busse-yachtshop.de/dae_fu...adar-1623.html

Note the output is 2.2 KILOwatts.

Using the above formula, V times amps = watts, you get approximately 14
amps.

You're even more clueless than poor Skippy!

Wilbur Hubbard


Interesting that the example you picked is the EXACT model I have.

It draws what I said it draws. Furuno agrees with me, if you look in
the manual.

It has a range of 16 miles.

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Old June 4th 09, 12:52 AM posted to rec.boats.cruising
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Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19 PRF and RMS power

On Wed, 3 Jun 2009 17:48:22 -0400, "Wilbur Hubbard"
wrote:

wrote in message
...
Wilbur,

Stick to stuff you understand.
1. The VHF is on at a100% duty cycle so it's output is 25 watts as you
stated.
2. The RADAR has a pulsed output. The shorter the pulse the better the
resolution of the radar. I remember one 25KW radar I was repairing only
used
5 watts for the magnetron.

Power consumed depends on the pulse width and the pulse repetition
frequency.




That's odd, I could have sworn the link I posted rated the yacht radar
described at 2.2 kilowatt output.

Wilbur Hubbard


What a complete dope.
  #24   Report Post  
Old June 4th 09, 12:53 AM posted to rec.boats.cruising
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Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19 PRF and RMS power

On Wed, 3 Jun 2009 18:16:30 -0400, "Wilbur Hubbard"
wrote:

wrote in message
...
It is a 2.2 KW pulse for say one microsecond 200 times a second and off
the
rest of the time. Do the math, 200 microseconds on the rest of the time it
is off.
You can see this is not going to be a very high average power.




I see your point. If it only runs at that kilowatt output for 1/10 of a
second then for the entire second it will have a draw 1/10 for the entire
second. When talking amps it is better to talk amp/hours. But even so, 2.2
kilowatts - one tenth of that is still 22 watts only for generating the
signal. You still have gears and motor turning that rotor and you still have
the receiver power draw, the cpu power draw and the screen power draw. That
idiot who claimed his radar only draws 2.1 amps continuously is lying. You
don't get something for nothing.

Wilbur Hubbard


I got that figure out of the manual for my Furuno 1623 RADAR.

And I didn't say my RADAR draws that much continuously. It draws
considerably less than that most of the time.

  #25   Report Post  
Old June 4th 09, 01:06 AM posted to rec.boats.cruising
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Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19 PRF and RMS power

On Wed, 3 Jun 2009 17:48:22 -0400, "Wilbur Hubbard"
wrote:

wrote in message
...
Wilbur,

Stick to stuff you understand.
1. The VHF is on at a100% duty cycle so it's output is 25 watts as you
stated.
2. The RADAR has a pulsed output. The shorter the pulse the better the
resolution of the radar. I remember one 25KW radar I was repairing only
used
5 watts for the magnetron.

Power consumed depends on the pulse width and the pulse repetition
frequency.




That's odd, I could have sworn the link I posted rated the yacht radar
described at 2.2 kilowatt output.

Wilbur Hubbard


You should have read the whole page before trying to use it as a
reference, dumbass. Further down it says:

Power consumption Max. 36 W, 8 W in standby mode

To get it to draw the max, you would need to crank up the gain all the
way while in 16 mile range. The only time you might do that for a very
brief period is when looking for rain off in the distance.

Realistically, you will almost never draw more than 2 amps, and most
of the time less than that.



  #26   Report Post  
Old June 4th 09, 11:48 PM posted to rec.boats.cruising
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Posts: 2,869
Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19

wrote in message
...
On Wed, 3 Jun 2009 16:00:34 -0400, "Wilbur Hubbard"
wrote:

wrote in message
. ..
On Tue, 2 Jun 2009 21:22:28 -0400, "Wilbur Hubbard"
wrote:

"Wayne.B" wrote in message
m...
On Tue, 2 Jun 2009 20:25:27 -0400, "Wilbur Hubbard"
wrote:

Real sailors won't abide radar.

Bull




Not bull! Fact!

If you run radar you are motoring because the damned things draw so much
power. Since you're motoring you are no sailor.

False.

My RADAR draws slightly over 2.1 amps MAX. Over 10 hours of normal
use, it draws an average of about 1/4 to 1/2 amp, or 3 - 5 amp hours
in a 10 hour day. It is really even be less than that. I have a
dedicated AGM battery for just the RADAR and a small 20 watt solar
panel has no trouble keeping it fully charged regardless of how much I
use the RADAR.



LIAR! Volts X Amps = Watts.

So if your unit draws 2 amps that means your unit has a puny 24 or so watt
output provided it it 100 percent efficient which it is NOT. Hell, a VHF
radio outputs at 25 watts and it has no moving parts.

That means your pitiful 2.1 amp radar is good for a range of maybe a 1/10
mile. Waste of time and space, dude! Freaking TOY!

Here's a link to a compact yacht radar:
http://www.busse-yachtshop.de/dae_fu...adar-1623.html

Note the output is 2.2 KILOwatts.

Using the above formula, V times amps = watts, you get approximately 14
amps.

You're even more clueless than poor Skippy!

Wilbur Hubbard


Interesting that the example you picked is the EXACT model I have.



I'm just very intelligent and know just about everything including most of
your personal life.


It draws what I said it draws. Furuno agrees with me, if you look in
the manual.

It has a range of 16 miles.


It draws more than 2.1 amps for the entire system. Don't you know the spec
is only for the transceiver? It does not include the antenna and the motor
that spins it. Get a clue.

Your claim is way lame, dude. It's like me claiming my Adler Barbour draws
only .01 amp on standby. Too bad on standby it doesn't cool squat.


Wilbur Hubbard



  #27   Report Post  
Old June 5th 09, 01:38 AM posted to rec.boats.cruising
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Posts: 146
Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19

On Thu, 4 Jun 2009 18:48:18 -0400, "Wilbur Hubbard"
wrote:

wrote in message
.. .
On Wed, 3 Jun 2009 16:00:34 -0400, "Wilbur Hubbard"
wrote:

wrote in message
...
On Tue, 2 Jun 2009 21:22:28 -0400, "Wilbur Hubbard"
wrote:

"Wayne.B" wrote in message
om...
On Tue, 2 Jun 2009 20:25:27 -0400, "Wilbur Hubbard"
wrote:

Real sailors won't abide radar.

Bull




Not bull! Fact!

If you run radar you are motoring because the damned things draw so much
power. Since you're motoring you are no sailor.

False.

My RADAR draws slightly over 2.1 amps MAX. Over 10 hours of normal
use, it draws an average of about 1/4 to 1/2 amp, or 3 - 5 amp hours
in a 10 hour day. It is really even be less than that. I have a
dedicated AGM battery for just the RADAR and a small 20 watt solar
panel has no trouble keeping it fully charged regardless of how much I
use the RADAR.



LIAR! Volts X Amps = Watts.

So if your unit draws 2 amps that means your unit has a puny 24 or so watt
output provided it it 100 percent efficient which it is NOT. Hell, a VHF
radio outputs at 25 watts and it has no moving parts.

That means your pitiful 2.1 amp radar is good for a range of maybe a 1/10
mile. Waste of time and space, dude! Freaking TOY!

Here's a link to a compact yacht radar:
http://www.busse-yachtshop.de/dae_fu...adar-1623.html

Note the output is 2.2 KILOwatts.

Using the above formula, V times amps = watts, you get approximately 14
amps.

You're even more clueless than poor Skippy!

Wilbur Hubbard


Interesting that the example you picked is the EXACT model I have.



I'm just very intelligent and know just about everything including most of
your personal life.


It draws what I said it draws. Furuno agrees with me, if you look in
the manual.

It has a range of 16 miles.


It draws more than 2.1 amps for the entire system. Don't you know the spec
is only for the transceiver? It does not include the antenna and the motor
that spins it. Get a clue.

Your claim is way lame, dude. It's like me claiming my Adler Barbour draws
only .01 amp on standby. Too bad on standby it doesn't cool squat.


Wilbur Hubbard



The advertised power of a RADAR is normally the peak transmitter
power. Radar uses a pulsed transmission, and only transmits its peak
advertised power for (usually) under 0.1% of the time. One RADAR I
had transmitted an 0.08 uS pulse 2200 times per second. It had a 2.15
amp fuse (12 volt) feeding the whole system including the antenna
motor and LCD display.


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca
  #28   Report Post  
Old June 5th 09, 11:11 AM posted to rec.boats.cruising
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Posts: 4,966
Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19

On Thu, 4 Jun 2009 18:48:18 -0400, "Wilbur Hubbard"
wrote:

wrote in message
.. .
On Wed, 3 Jun 2009 16:00:34 -0400, "Wilbur Hubbard"
wrote:

wrote in message
...
On Tue, 2 Jun 2009 21:22:28 -0400, "Wilbur Hubbard"
wrote:

"Wayne.B" wrote in message
om...
On Tue, 2 Jun 2009 20:25:27 -0400, "Wilbur Hubbard"
wrote:

Real sailors won't abide radar.

Bull




Not bull! Fact!

If you run radar you are motoring because the damned things draw so much
power. Since you're motoring you are no sailor.

False.

My RADAR draws slightly over 2.1 amps MAX. Over 10 hours of normal
use, it draws an average of about 1/4 to 1/2 amp, or 3 - 5 amp hours
in a 10 hour day. It is really even be less than that. I have a
dedicated AGM battery for just the RADAR and a small 20 watt solar
panel has no trouble keeping it fully charged regardless of how much I
use the RADAR.



LIAR! Volts X Amps = Watts.

So if your unit draws 2 amps that means your unit has a puny 24 or so watt
output provided it it 100 percent efficient which it is NOT. Hell, a VHF
radio outputs at 25 watts and it has no moving parts.

That means your pitiful 2.1 amp radar is good for a range of maybe a 1/10
mile. Waste of time and space, dude! Freaking TOY!

Here's a link to a compact yacht radar:
http://www.busse-yachtshop.de/dae_fu...adar-1623.html

Note the output is 2.2 KILOwatts.

Using the above formula, V times amps = watts, you get approximately 14
amps.

You're even more clueless than poor Skippy!

Wilbur Hubbard


Interesting that the example you picked is the EXACT model I have.



I'm just very intelligent and know just about everything including most of
your personal life.


It draws what I said it draws. Furuno agrees with me, if you look in
the manual.

It has a range of 16 miles.


It draws more than 2.1 amps for the entire system. Don't you know the spec
is only for the transceiver? It does not include the antenna and the motor
that spins it. Get a clue.

Your claim is way lame, dude. It's like me claiming my Adler Barbour draws
only .01 amp on standby. Too bad on standby it doesn't cool squat.


Wilbur Hubbard



You are free to remain clueless. That's what everyone here expects of
you. You have yet to disappoint them.

  #29   Report Post  
Old June 5th 09, 04:14 PM posted to rec.boats.cruising
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Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19

On Tue, 02 Jun 2009 23:42:44 -0400, Wayne.B
wrote:

Radar does use a fair amout of power. That's a fact but not
necessarily an issue on a larger boat with decent battery banks.
Modern radars do have power saving modes where they wake up every
minute or so, make a few sweeps, activate an alarm if targets are
detected, and then go back to sleep. I've sailed thousands of miles
at night without radar but I count myself lucky and will never do it
again if I have a choice.


You can get radar under a grand, and with a power consumption of less
than 2 amps. A hundred amp alternator can put out a days worth of
juice in fifteen minutes. You would need a hefty battery to absorb it
that quick, however.

Casady
  #30   Report Post  
Old June 5th 09, 04:38 PM posted to rec.boats.cruising
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Posts: 2,587
Default Lucaya, Grand Bahama Island to Saint Simons Island GA April 18-19

On Wed, 3 Jun 2009 16:00:34 -0400, "Wilbur Hubbard"
wrote:

Note the output is 2.2 KILOwatts.


You are so full of **** your eyes are floating. The figure for radars
is peak power, the rating, not average, what the battery sees. By your
math, your 2.2 kw radar would draw 180 amps. The monster alternator
would not be cheap in the box, let alone installed. One more time. A
2kw radar draws less than two amps.

By the way, one hundredth the power gives you thirty percent of the
range. Power in the radar return is proportion to the fourth power of
distance. Were you an English major? None of them ever took Physics.

Casady


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