Subject:
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Re: HELP! Train motors dead and dieing!
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Newsgroups:
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lugnet.trains
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Date:
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Fri, 14 Nov 2003 17:06:47 GMT
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Viewed:
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1750 times
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In lugnet.trains, Reinhard "Ben" Beneke wrote:
> In lugnet.trains, Peter Ehrlich wrote:
> > Hmm. I've setup a bigger layout (one floorsworth) and still its a full 9v
> > on the farthest away point.
>
> Hi Peter!
>
> But that is only measured without electric load. Even if you have a really high
> resitance in the joints of the track, you still will have the 9V at any given
> point of the track as long as you have no parallel load on the track. A motor
> might have much less than 9V at that far away point of the loop...
You can test this for yourself. Measure the voltage of a 9v battery with your
voltmeter, then measure it again in series with a 10K resistor. It's still 9V!
Now, think of all those track pieces (and joints) as tiny little resistors...
:-)
Mark
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Message has 1 Reply:
 | | Re: HELP! Train motors dead and dieing!
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| (...) Okay I tried measuring resistance on track 47 joints long (a broken circle) but still, the resistance is only 2-6 ohms. Then I tried running them one at a time. Even on top notch the older motor needs nudging to start on straight, has real (...) (21 years ago, 14-Nov-03, to lugnet.trains)
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Message is in Reply To:
| | Re: HELP! Train motors dead and dieing!
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| (...) Hi Peter! But that is only measured without electric load. Even if you have a really high resitance in the joints of the track, you still will have the 9V at any given point of the track as long as you have no parallel load on the track. A (...) (21 years ago, 14-Nov-03, to lugnet.trains)
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