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D.C.-D.C. Step-Up Converters Discussed
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 Posted: Thu Feb 26th, 2015 02:15 am
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Bernd
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Ok so we've got everybody trying to jam more batteries where they won't fit so they can get almost 12 volts to operate their engines.

Has anybody thought of perhaps changing the motor to a lower voltage. Seems we are stuck in 12 volt motor paradigm.

I did 3 HO steamers. Changed them from 12 volts to 6 volts. Still have the same pulling power as the 12 volt. Only I'm not running batteries on the as yet. I used voltage from the track. It can be AC, DC, or DCC because I run a voltage rectifier to supply 6 volts to the control circuit, a Deltang RX41d Receiver.



Works for me.

Bernd

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 Posted: Thu Feb 26th, 2015 07:47 am
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Tramcar Trev
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That would work but I would have to find a 6V motor block, the bachmann ones I use do not seem to have a generic motor available.



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 Posted: Thu Feb 26th, 2015 08:31 am
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Helmut
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Alas only the hobby's dinosaurs ( like me ) seem to dare to tackle the mechanics to fit their desires. I even put in a 3v motor where appropriate. Those 3...6v can motors ( not to be taken for instrument motors, mind you ) of nowadays are a lot more effective than the open-frame 12V ones they still put in the models.

@Bernd
Why don't you put in a step-down converter 0f 0.5A rating, same size as the 78xx series? They have a rather wide input range and you could run your locos on e.g. any DCC layout wthout precautions. Space left over is enough in my eyes.

Last edited on Thu Feb 26th, 2015 08:52 am by Helmut



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 Posted: Thu Feb 26th, 2015 12:46 pm
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Bernd
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Helmut wrote:
Alas only the hobby's dinosaurs ( like me ) seem to dare to tackle the mechanics to fit their desires. I even put in a 3v motor where appropriate. Those 3...6v can motors ( not to be taken for instrument motors, mind you ) of nowadays are a lot more effective than the open-frame 12V ones they still put in the models.

The only reason hobby dinosaurs do that is that they know how, have the tools and want to do it to get a better running engine. To me that's part of the fun in the hobby. To others it's just a lot of work they would rather not deal with. So be it. It was just a suggestion.

@Bernd
Why don't you put in a step-down converter 0f 0.5A rating, same size as the 78xx series? They have a rather wide input range and you could run your locos on e.g. any DCC layout wthout precautions. Space left over is enough in my eyes.


Those engines were modified many years ago, long before you even signed up. I discovered the Deltang receivers. The next generation of this set up will have a circuit board designed and use SMD. I just have a few other projects ahead of this to finish first.

Bernd

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 Posted: Thu Feb 26th, 2015 02:32 pm
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Herb Kephart
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''The only reason hobby dinosaurs do that is that they know how, have the tools and want to do it to get a better running engine. To me that's part of the fun in the hobby. To others it's just a lot of work they would rather not deal with. So be it. It was just a suggestion.''

And there you have it in a nutshell. Back in the day, a friend had a  prewar (that's pre WW2 folks) Mantua 0-4-0 camelback with a 3 pole 6 volt motor. Six volts was standard for HO back then. His son had put it on the layout to see how fast it would go on 12 volts, and toasted the windings. Asked if I could rewind it for twelve volts. I did. Took three or four tries, but I got it to work. ''Formula'' back then was three wires sizes smaller for twice the voltage. At that time I only had very basic hobby tools

Of course, this was an old style open frame motor, which incidentally can be made to operate much better with an armature balance job, and reduction of brush tension. The idea is to push the limits of your ''comfort zone'' Pick up a $5 loco at a show and dive into it. If you make a mess of getting it to run, go find another 5 buck special. You won't have a big investment, Iif you find that swapping motors isn't for you it's OK, but TRY.--You might just surprise yourself. Remember that there are always people out there with less ability than you have.


Herb--the happy



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 Posted: Thu Feb 26th, 2015 03:02 pm
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W C Greene
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Oh goodness, this opens a can of ancient worms! Alas, today's model railroader wants (needs) to open the green box and run his/hers new loco. Of course there's a 28 page manual about programming, CV's, this & that which needs to be memorized before the new loco will turn a wheel. Such a shame that we can't just turn on the transmitter, then the loco, and RUN the freaking loco! Now, I gotta get after that Tyrannosaur before lunch....Later Gator..

Woodie



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 Posted: Thu Feb 26th, 2015 03:41 pm
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fallen
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I have been putting radio control into 009 locos and yes I do change the motors if necessary (ie if they are old and inefficient). I think this is partly because you have to build locos, usually from kits, in 009, as RTR is pretty sparse, although it is coming along now. So you get used to fiddling with the works and also you can build a kit to suit the radio and battery gear.

I'm starting into 3mm scale (100:1) standard gauge now.... You have to build those too.

Frank

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 Posted: Thu Feb 26th, 2015 03:47 pm
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Bernd
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And there you have it folks. Three dinosaurs with the same thinking.

But, and there always is one, there are modelers out there who all they want to do is operate the trains in a most realistic fashion. This opens a niche market for the guys that can fix things like installing motors, etc. There's lots of MMTB modelers out their.

For you folks in Rio Linda, MMTB is More Money Than Brains. ;) :bg: :)

Have a nice day.:Salute:

Bernd

 

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 Posted: Fri Feb 27th, 2015 01:27 am
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Si.
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Hi Herb.

I think the axle-hole in your flagstone is a bit off...

...chip more away on the bottom right.

Si.



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 Posted: Fri Feb 27th, 2015 04:15 am
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Tramcar Trev
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Last edited on Fri Feb 27th, 2015 04:21 am by Tramcar Trev



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There once was a man who said Damn!!
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A creature that moves
in predestinate groves
I'm not a Bus, I'm a tram
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