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DCC Compatibility

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  • Member since
    January 2008
  • 595 posts
DCC Compatibility
Posted by mreagant on Thursday, August 28, 2008 3:23 PM

I have used the MRC Command 2000 DCC system since it first came out in the mid/late '90s and have been pleased with it as far as it goes.  I recently decided that the improvements in DCC, especially sound, in the last dozen years have persuaded me to replace the old system.  An email to MRC with a few basic questions about making the change raised some serious concerns.  Did I get the right/straight answers?

1.  Since I have a number (20 or so) custom painted older DC locomotives, I asked about using some of them on the layout pending their upgrade to decoders.  Answer was that "newer dcc systems do not run analog locos as it is no good for the loco motor or the dcc system."  I had never heard this.  Is it accurate?

2.  My layout is completely 'wired' with a 4-wire telophone jack system for walkaround throttle control.  I was told that "it would need to be changed" in order to accept the Prodigy hand held throttle.  Is this correct?

 Thanks.

  • Member since
    February 2007
  • From: Christiana, TN
  • 2,134 posts
Posted by CSX Robert on Thursday, August 28, 2008 3:49 PM
The newer MRC systems do not support running an anlog loco, but Digitrax and Lenz do. As fas as it not being good for the loco motor, they do heat up some and if you leave one setting for too long it will overheat the motor. Many people still run analog locos on their DC layouts without any problems. If you have been doing it with your Command 2000 without any trouble, youwould not have any trouble with a newer system. It is in no way "not good for the dcc system," except that it does slows the response time, but on most home layouts, this would never be noticed.

Yes the wiring would have to be changed.

  • Member since
    October 2004
  • From: Richmond, Texas
  • 393 posts
Posted by RDG1519 on Thursday, August 28, 2008 4:44 PM

I would suggest working with your local hobby shop if this is your first DCC system. It may cost more for the equipment but you will have some local experienced people you can call up. You can ask them to try a DC loco on a test track that is attached to a DCC throttle. You can than see and hear for yourself.

I use MRC Prodigy Advance and do not operate any of my older DC units, they are awaiting conversion to DCC. I replaced a DigiTrax Big Boy that supported DC and DCC. The DCC part was fine, the DC part was lousy. It was noisey, with high pitched wining. Maybe the newer systems do not have this problem.

The bottom line is you will be spoiled by DCC and will want to upgrade most of your power. I would not use the "will support DC loco's" as a major criteria. I have not looked back since going to DCC 10 years ago. I know there are some who will take issue with this, but I really do not know anyone who routinely mixes DCC and DC.

I hope someone who is experienced with running both DCC and DC simultaneously on a regular basis responds to this post with his or her experience.

The best advice work with your local hobby shop and test it before buying.

Chris

 

Great grandson of John Kiefer, Engineman Philadelphia and Reading Railroad, 1893 to 1932
  • Member since
    January 2007
  • 327 posts
Posted by locoworks on Thursday, August 28, 2008 4:53 PM
 RDG1519 wrote:

I use MRC Prodigy Advance and do not operate any of my older DC units, they are awaiting conversion to DCC. I replaced a DigiTrax Big Boy that supported DC and DCC. The DCC part was fine, the DC part was lousy. It was noisey, with high pitched wining. Maybe the newer systems do not have this problem.

Chris

 

they do have the 'problem', they work by using AC to drive the DC motor, the slower the loco is travelling the worse the high pitched whining. although DC loco's can be driven, it is not really advisable as the motor gets a lot hotter on address 00.

  • Member since
    December 2004
  • From: Bedford, MA, USA
  • 21,340 posts
Posted by MisterBeasley on Thursday, August 28, 2008 6:24 PM

When you do run DC locos on a DCC layout, they behave like DC locos.  That is, you are back to "running the track" instead of running the trains.  All DC locos will move in the same direction, at about the same speed, at the same time.  Instead of "forward" and "reverse," you're back to "left" and "right," or maybe "clockwise" and "counterclockwise" if you have a loop.  So, while you can run one DC engine, or two or more if you consist them together, you will never have independent control of multiple DC engines the way you do with DCC.

Another DCC advantage, the availability of auto-reverse units to control reverse loops and wyes, simply doesn't work with DC engines.

So, the answer I'd give is "Yes, you can run DC locos on your DCC layout, but after a short while you won't want to."  Hopefully, those engines are good enough to install decoders in and convert them to DCC.

It takes an iron man to play with a toy iron horse. 

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