Skip to main content

1 reply

QSI DCRU Question

spwillsspwillsOGR Forum Member

     I recently purchased an early MTH GG1 (MT-5105L). I'm pleased with engine but would like to know more about the QSI DCRU. As it stands, the directional lighting is controlled by placing the lamps in parallel with the motors and then using a diode in series with each bulb to block/allow current flow depending on the polarity. The design works, but in neutral neither lamp is energized (obviously, since there is no power to the motor circuit). I would like to have both lamps energized in neutral.

 

Question 1: Is there a means to control the lighting off of the DCRU so that both lamps are energized in neutral?

 

Question 2: Is there a technical manual for the DCRU and associated circuitry?

 

Thanks

Original Post
G GGGOGR Forum Member

No wiring diagram, you have to back engineer it.  I imagine you could create a circuit with logic to do what you want, but the DCRU doesn't.  If they are truly wired off the motor leads as you state.

 

DCRU and MTH PS-1 used the voltage across 2 diodes that had current flow in a specific direction to energized 1.5V bulbs.  For steam the headlight was track power with a direction 1.5V tender bulb.  Diesels used 2 1.5V directional bulbs.

 

In neutral no motor lead voltage present I believe.  G

Add Reply

Views: 203
Post

OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

Membership Required

We're sorry. You must be signed in to continue. Sign In or Register
×
Are you sure you want to remove from your Block List?
×
Loading...
×
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .
×
Link copied to your clipboard.
×

Access to this requires an OGR Forum Supporting Membership

OGR Forum Supporting Membership

Help support this forum with an OGR Forum Supporting Membership.
You will be able to watch the videos in the INSTRUCTIONAL VIDEO FORUM!
A one-year OGR Forum Supporting Membership is only $12 per year, so sign up now!


    OR     


Access the ALL the OGR VIDEO FORUMS AND  over 300 back issues of OGR
with a DIGITAL SUBSCRIPTION!



$12.00 per 12 Months (plus tax if applicable)
×