Trains.com

Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Build a DC throttle

369 views
2 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    May 2017
  • 75 posts
Build a DC throttle
Posted by Capt.Brigg on Tuesday, March 7, 2023 4:08 PM

Many years ago there was an article in MR on how to build a DC throttle. I built one and now can't find the article. I need to replace something on the PC board and need the article to work with. If you know what issue the DC throttle article was in, please respond with the issue date and page. Thanks. Capt. Brigg Franklin

  • Member since
    August 2003
  • From: Collinwood, Ohio, USA
  • 15,415 posts
Posted by gmpullman on Tuesday, March 7, 2023 5:38 PM

I recall building a TAT IV back in 1979. I don't remember which article (or series of articles) I used then.

This thread mentions the March 1969 issue as having the TAT IV article:

https://cs.trains.com/mrr/f/744/t/202840.aspx

I remember completing the throttle and testing it successfully but today I can not recall at all what I did with it Tongue Tied

Perhaps I made the TAT V throttle. It seems that article was in the June 1975 M-R:

jjscott2
The mystery of this throttle is now solved (mostly).  The circuit matches that in the June 1975 article "Transistor Throttle With A Future".  My throttle has two additions: a volt meter and an extra potentiometer.   The pot is added to the momentum circuit at terminal 16.  R7 is replaced with a 10k ohm resistor; the pot is 50k ohms.

(From the aforementioned thread)

If you really want to go back to origins I believe the first Linn Westcott article for a transistor throttle was the Feburary, 1962 issue. The "Blunt Brake" was an interesting concept addressed in the August 1968 issue.

Good Luck, Ed

 

  • Member since
    July 2009
  • From: lavale, md
  • 4,288 posts
Posted by gregc on Wednesday, March 8, 2023 4:41 AM

i have several pdf's of articled from Jan '62, Feb '62 and Mar '69

greg - Philadelphia & Reading / Reading

Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Search the Community

ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT
Model Railroader Newsletter See all
Sign up for our FREE e-newsletter and get model railroad news in your inbox!