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Author Topic:   Amp draw from radio
zinny0753 posted 05-14-2003 12:44 PM ET (US)   Profile for zinny0753   Send Email to zinny0753  
I just installed a new radio on my Whaler and I want to keep power to it so I won't lose memory. The draw is 4ma. Is that a lot?


jimh posted 05-14-2003 01:50 PM ET (US)     Profile for jimh  Send Email to jimh     
Marlin posted 05-14-2003 09:40 PM ET (US)     Profile for Marlin  Send Email to Marlin     
To embellish upon Jim's answer, a group 24 starting battery (which is about as small and cheap as they come) will provide something like 80 amp-hours from fully charged to discharged. At a draw of 4 mA, that's 20,000 hours, or more than two years, of power. In other words, the radio might as well not exist.
BW23 posted 05-15-2003 03:48 PM ET (US)     Profile for BW23  Send Email to BW23     
I was curious and measured 3 mA for my Jensen clock/radio .
zinny0753 posted 05-15-2003 04:45 PM ET (US)     Profile for zinny0753  Send Email to zinny0753     
Great. Thanks guys for the great feedback.


triblet posted 05-16-2003 01:42 PM ET (US)     Profile for triblet  Send Email to triblet     
Are you sure it will loose memory if it looses
power? Some modern radios use a flash memory
that will survive power outages.

But it will loose the clock.


jimh posted 05-16-2003 11:35 PM ET (US)     Profile for jimh  Send Email to jimh     
A little clarification: the correct name for "Amp draw" is current. Electrical current is measured in amperes. If you want to refer to current drain, use the word current, not "amps" which is a unit of measurement of current.

It is like asking someone about the weather and inquiring "How many degrees is it?" Most people ask "What is the temperature?"

A "mA" is a milliampere, or 1/1000th of an ampere of current. That is 1000 mA = 1 Ampere.

When a device is not active, its current is referred to as the quiescent current.

So the TOPIC should be something like "Radio's quiescent current drain on battery."

HAPPYJIM posted 05-17-2003 12:14 AM ET (US)     Profile for HAPPYJIM  Send Email to HAPPYJIM     
Next month my lovely Ex-wife(bless her heart)current drain on my wallet will be quiescent. I look forward to new fishing tackle & more fishing trips which will be a big charge to me. It makes my voltage spike just thinking about it.......oh, sorry.

kingfish posted 05-17-2003 07:35 AM ET (US)     Profile for kingfish  Send Email to kingfish     
tickled me (but it didn't shock me)-
zinny0753 posted 05-27-2003 04:57 PM ET (US)     Profile for zinny0753  Send Email to zinny0753     
Thansk for the help guys.

Jimh, I know this is your playground, but are you always such an arrogant dweeb??

Should I define arrogant for you?

jimh posted 05-28-2003 11:15 PM ET (US)     Profile for jimh  Send Email to jimh     

You are welcome to post questions in any style you like. People are welcome to make inferences about you from the way you write, the questions you ask, and the terms you use to ask them.

You are welcome to ignore any advice offered. You can walk around the rest of your life talking about "amp draw" instead of "current." The reason I mentioned that "amp draw" was an awkward term and offered a better one is so other readers will learn and not walk around talking about "amp draw" the rest of their lives, mistakenly thinking that is how intelligent people talk about electrical currents. So even if you got no benefit from my mentioning that the proper term to describe the flow of electrons down a wire is "current", perhaps other have benefited.

Because you have written an article with poor technical language does not prevent me from changing it. The purpose of the forum is and always has been to collect high-information-content material about Boston Whaler boats. When articles appear that have poor information content I try to fix them up, edit them, otherwise correct them, or perhaps delete them.

I don't see anything in what I wrote that was directed at you as a person, that labeled you with unflattering descriptions, called you a name, etc.

Yet you have taken offense that I have simply corrected the terminolgy you used. In reply you have publicly insulted me with terms like "arrogant" and "dweeb".

You can post insults about me if you choose, but I would not say you are welcome to do that, nor do I feel an obligation to publish article from you that contain such insults.

If you felt insulted, defamed, shamed, or otherwise degraded as a human being because I proffered that perhaps your choice of language to describe the flow of electrical current was less than the best, I hereby publicly apologize. I am sorry.

If you think that I have an obligation to you to provide you with a forum--and one widely read, too- in which you can freely insult me and call me names, I must point out that I am under no such obligation.

zinny0753 posted 05-29-2003 10:47 AM ET (US)     Profile for zinny0753  Send Email to zinny0753     
I accept your apology and also offer one to you.

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