*ist DS AF speed

[Cory Papenfuss]

On Tue, 15 May 2007, Patrice LACOUTURE (GMail) wrote:

>
>> I think you'll find that if you continue to use your MZ-5 with NiMH
>> batteries, the AF motor will self destruct pretty quickly. It wasn't
>> designed to use batteries with that much current.
>> I bet it runs really fast, but not for long.
>>
>> William Robb
>>
> Hi William,
>
> What to you mean with, "with that much current"? The rated voltage for
> NiMH batteries is 1.2V each, instead of 1.5V, and unless their internal
> resistance is way lower than that of alkaline cells, they should provide
> less current. My experience with various equipment tends to second that.
> Or am I all wrong somewhere?
>
> I've been using my MZ5n flawlessly with NiMH for a few years now, maybe
> I'm just lucky. The AF in my previous MZ5 fried after a few years of
> moderate use, but I didn't use NiMH back then.
>
> Thanks and best regards
>
> Patrice
>
 	WR had a poor choice of words.  NiMH may say it's nominally 1.2V, 
but Alkaline is most certainly not 1.5V.  Alkaline drops its voltage a 
fair bit as it discharges and has a much higher internal resistance than 
NiMH.  The combination of the two mean that under a high load, they each 
put out about the same (1.2-ish).  The NiMH is more efficient there, and 
has more energy to boot.


-Cory

-- 

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* Cory Papenfuss, Ph.D., PPSEL-IA                                       *
* Electrical Engineering                                                *
* Virginia Polytechnic Institute and State University                   *
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