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Control article in Model Railroader in the 1970's

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Control article in Model Railroader in the 1970's
Posted by Mazleg on Wednesday, August 13, 2008 10:09 AM
An article was published in Model Railroader in the 70's with plan for constucting a push button speed and braking controller. I did build this and found it excellent for precise control. After a break from modelling I have now returned and would like to build two or three more of these controllers. Can anyone help me please. The controller consisted of two transistors and a third three terminal device,possibly a thyristor. Would be great if someone could come up with the article, and I would be most grateful
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Posted by TomDiehl on Wednesday, August 13, 2008 10:18 AM
Model Railroader published quite a few plans for electronic speed controls in the 70's. You can look it up in the Index of Magazines on this site and at least let us know what issue you're trying to find.
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Posted by jeffrey-wimberly on Wednesday, August 13, 2008 10:52 AM

I searched through Model Railroader using some keywords. Maybe you can find something in  them.

Search 1 using 'control' for keyword.

Search 2 using 'brake' for keyword.

Search 3 using 'momentum' for keyword.

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Posted by maxman on Wednesday, August 13, 2008 1:06 PM

It might be helpful if you could narrow down the time frame a bit.  Looking at the MR magazine index a lot of throttle articles come up, but what they actually contain would require looking at the magazines.  Some of us have, or have access to, the old magazines, but searching through 10 year's worth would take a big effort.

I think a bigger question would be can you come up with the parts required to make the throttle.  I suspect that many of the transistors that were available in the 70's are obsolete and no longer available.

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Posted by gandydancer19 on Thursday, August 14, 2008 3:43 PM

MR, January 1986. "Build an Inexpensive Walk-Around Throttle."

The controller had five buttons. FWD, REV, INC, DEC, and Emergency Stop. You could unplug the controller and the train would continue to run while you walked to another location and plugged it back in. The longer you held down the INC or DEC buttons, the faster or slower the train would go with momentum effects being applied. The FWD / REV buttons would control a relay that would reverse the output polarity and thus the direction.

I built three of them and used them on my last layout before changing over to DCC. The article had a couple of errors in it that subsequent issues had corrections in. I used standard telephone plugs and receptacles for the controller cables to plug in to.


The above is my opinion, from an active and experienced Model Railroader in N scale and HO since 1961.

(Modeling Freelance, Eastern US, HO scale, in 1962, with NCE DCC for locomotive control and a stand alone LocoNet for block detection and signals.) at home, and N scale at the Club.

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