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.

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

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.

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

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.

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

A microsecond is one millionth of a second.
http://en.wikipedia.org/wiki/Microsecond

Not 1/10 of a second. 200/1,000,000 of a second or 0.0002 second.

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.

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


What a clueless twit!

Brian W

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.