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radar warm up..what is it actually doing?

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radar warm up..what is it actually doing?

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Old 08-02-2010, 08:50 AM
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Default radar warm up..what is it actually doing?

Wassup guys,

I always wanted to know what the radar is doing when it is warming up and why its takes a minute + to do it?
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Old 08-02-2010, 09:04 AM
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I know...my microwave doesn't have to warm up
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Old 08-02-2010, 09:16 AM
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I dont exactly know what it doing but im pretty sure its warming up a filament in the magnatron.
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Old 08-02-2010, 08:16 PM
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after the demise of the crt, the magnatron is the last tube application in popular use.
with tubes you have to allow for it to come up to operating temperature.
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Old 08-02-2010, 08:22 PM
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Just like me, it needs a cup of coffee to get up to speed.
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Old 08-03-2010, 01:35 AM
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Note that the Navico Broadband radars are "instant on " -no warmup required.
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Old 08-03-2010, 04:17 AM
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That's because they don't use magnetron's. "Cooker" magnetrons used in microwave ovens operate under totally different conditions than magnetrons designed for use in radar. Cooker maggie's operate using 60 cycle sinusoidal line voltage as their trigger source and can operate under cold start conditions whereas radar uses a much higher frequency square wave pulse trigger that requires the filament temperature to warm up for stable operation of the maggie and not shorten it's lifespan.

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Old 08-03-2010, 03:16 PM
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Nice explanation ,Eric.
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Old 08-03-2010, 03:57 PM
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Originally Posted by fairbank56 View Post
That's because they don't use magnetron's. "Cooker" magnetrons used in microwave ovens operate under totally different conditions than magnetrons designed for use in radar. Cooker maggie's operate using 60 cycle sinusoidal line voltage as their trigger source and can operate under cold start conditions whereas radar uses a much higher frequency square wave pulse trigger that requires the filament temperature to warm up for stable operation of the maggie and not shorten it's lifespan.

Eric
Kind of like the Flux-Capacitor in that old DeLorean?
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Old 08-03-2010, 08:17 PM
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Originally Posted by signmansez View Post
Kind of like the Flux-Capacitor in that old DeLorean?
lol
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Old 08-05-2010, 06:50 AM
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problem is my boat doesnt go 88 mph, so time travel is not possible for me.....
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Old 08-05-2010, 06:21 PM
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Originally Posted by aristocraft View Post
problem is my boat doesnt go 88 mph, so time travel is not possible for me.....
But you must feel like you traveled back in time everytime you get in one of those cool Aristocrafts
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Old 08-05-2010, 06:53 PM
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No no no. Didn't you guys ever see Men in Black? The little alien dudes inside your radome have to have a little time to have a cig and cup of joe before getting to work.

It's in the UAW (Union of Alien Worker's) contract.

And when you get that Garmin "Radar Service Lost" message, it's just a potty break. You don't really think that stuff is designed in kansas, do you?
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Old 08-05-2010, 07:09 PM
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Originally Posted by bwchris View Post
But you must feel like you traveled back in time everytime you get in one of those cool Aristocrafts
you know, funny but true. just like driving a classic car... you really feel like you are in a different era..
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Old 08-06-2010, 04:09 PM
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Originally Posted by aristocraft View Post
problem is my boat doesnt go 88 mph, so time travel is not possible for me.....
http://timetraveler.ytmnd.com/
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Old 08-06-2010, 08:50 PM
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WTF did he say???? LOL!
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