Subject:
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Re: 13V ~ port on 12V transformer
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 23 Aug 1999 07:34:21 GMT
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Viewed:
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514 times
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This means, that now when we have 230V in Europe (European Union standard as
it is between 220 and 240V and whitin the limits), that it will be app 5% more
~almost 14V.
I have never checkid it, but the 741 (740, 742) is only a transformer
basically and some diodes?
Sonnich
In lugnet.trains, Tom McDonald writes:
> In lugnet.trains, Simon Denscombe writes:
> > My question is what is it for?
> >
> > My dad says it is the first change after the step-down from 240V (Europeans • who
> > use 220V transformers have a 12V ac port). The other 2 ports on the • tranformer
> > have a use - one for accessories, one for control of the train.
> >
> > Why provide a port that has no use?
>
> Your dad is correct.
>
> I'm not exactly sure why that port is provided except for testing or
> troubleshooting the transformer. 13V is also true of transformers here in the
> States.
>
> I've heard that 13V is used because transformers can dry out over time, thus
> a reduction in efficiency, so they add an extra volt to extend the usable
> lifetime.
>
> -Tom McD.
> when replying, it wasn't the little dutch boy's finger; it was a wad of
> spamcake!
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Message has 1 Reply:
 | | Re: 13V ~ port on 12V transformer
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| (...) Well we are still running at 240V (officially 230V) using the 15% upper limit. (...) Possibly, the transformer to get from 230V to 13V and the diodes for the rectification for DC. (25 years ago, 23-Aug-99, to lugnet.trains)
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Message is in Reply To:
| | Re: 13V ~ port on 12V transformer
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| (...) who (...) tranformer (...) Your dad is correct. I'm not exactly sure why that port is provided except for testing or troubleshooting the transformer. 13V is also true of transformers here in the States. I've heard that 13V is used because (...) (25 years ago, 23-Aug-99, to lugnet.trains)
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