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N.M.R.A. Convention 2018
 Moderated by: W C Greene
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 Posted: Tue Apr 24th, 2018 04:19 pm
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Geoff L
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I am pleased to see that radio control and battery power are back on the schedule of topics for this year's clinics.

Pete Steinmetz has a presentation on battery power radio control and Donn Tolley one on battery powered engines, each with two opportunities to attend them.

Geoff

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 Posted: Wed Apr 25th, 2018 06:49 am
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John Durbetaki
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Just a few days ago, I was going through some back issues of the NMRA Bulletin and I found something related to this exact topic. December 1975 issue (yes, over 40 years ago) on page 3, Whit's Whimsies (Whit Towers was the editor), and he has a middle section titled ELECTRICAL CONTACT PROBLEM SOLVED - which says:

Back in June of '74, my Whimsy addressed itself to the problem of electrical contact twixt wheel and rail. I delineated things which I was doing to alleviate the problem, and several of you wrote in providing suggested remedies, most of which were dutifully published.
However, it remained for Don Fiehman (a regular with RAILROAD MODEL CRAFTSMAN) to come up with the ultimate solution, one which completely obviates any and all contact problems. He showed us at our 1975 PCR Convention with a battery-powered, radio-controlled locomotive. The rails could be non-conductive. We breathlessly await publication of the details.

How about that! I scanned the page and it is attached.

Buffalo John





- - - - - - -





The attached page has had to be removed


The scanned page is CLEARLY SHOWN AS COPYRIGHT of the N.M.R.A.

This published material is marked with 'C copyright' printed on it


If it is marked as such IT CANNOT BE POSTED here on Freerails !


A quote if attributed properly is usually acceptable


:f:


Eddie





Last edited on Wed Apr 25th, 2018 03:04 pm by



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 Posted: Wed Apr 25th, 2018 02:08 pm
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W C Greene
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I remember that article. But way back in 1952, Model Railroader's editor John Page had an editorial about how future modelers might/would be using radio control.
Very interesting.

Woodie



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 Posted: Wed Apr 25th, 2018 03:19 pm
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John Durbetaki
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Eddie - Sorry about the copyright problem.

John



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 Posted: Thu Apr 26th, 2018 02:41 am
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W C Greene
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Oh goodness, better delete my post also...I mentioned Model Railroader. Their name is copyrighted also.

"For shame, for shame, Sargent Carter!"
WCG



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 Posted: Thu Apr 26th, 2018 03:41 am
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Rod Hutchinson
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I don't know if the whole flimsy was published but in Australia you can post copyrighted material  if it for research and fair comment and less than 10% of the original.
The removal appears to be a knee jerk reaction to something that is permitted.

Last edited on Thu Apr 26th, 2018 03:58 am by Rod Hutchinson



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 Posted: Fri Apr 27th, 2018 12:26 am
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bobquincy
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I remember Don Fiehman's article (and still have a copy), this was the one that started me down the path of BPRC. In 1975 I did not have the capability (or the $$$) to build one that worked well, 43 years later it seems so easy. ;)

boB



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 Posted: Fri Apr 27th, 2018 12:35 am
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John Durbetaki
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It would be interesting to see what his solution looked like.

Much of the mid-70's electronics in the Bulletin were ttl logic gates, the 7400 series, current for the times, but really old school compared to now...




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 Posted: Fri Apr 27th, 2018 09:11 pm
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bobquincy
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Fiehmann used tone decoding with 555 chips to generate four distinct tones (FWD, REV, Headlight, Horn) and 567 chips to detect the tones.  It was PWM where the speed was controlled by the ratio of tone on/tone off.  The system transmitted on the 27 MHz band.

The article is in Railroad Model Craftsman, May 1976.  Yes, I have been playing with this stuff for a long time!  :)

boB

Last edited on Fri Apr 27th, 2018 09:12 pm by bobquincy



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 Posted: Sat Apr 28th, 2018 12:17 am
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John Durbetaki
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Thanks Bob, that is a pretty simple way to encode and decode the settings. I've got a bunch of back issues boxes to search for that issue.

John



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