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Bachmann RS-3

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  • Member since
    April 2004
  • From: Ontario Canada
  • 3,574 posts
Posted by Mark R. on Thursday, July 20, 2017 10:06 PM

Yeah, something is wrong somewhere. I just fired up eight engines (Loksound decoders) and with all eight just sitting there idling, the current draw is 0.437 amps .... less than your single Bachmann !

Mark.

¡ uʍop ǝpısdn sı ǝɹnʇɐuƃıs ʎɯ 'dlǝɥ

  • Member since
    October 2006
  • From: Western, MA
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Posted by richg1998 on Thursday, July 20, 2017 9:24 PM

This should be the soundboard. I do not see the caps but they are prpobably surface mount type. May be under the PC and possibly the inductors.

Check the motor. I have seen one to three caps on some Bachmann locos.

My 70 ton had three yellow blob caps on the motor. Inductors were on a PC board.

Bachmann makes a lot of changes with the same ingine.

http://estore.bachmanntrains.com/images/ho_parts/HO-SDC-DIESEL.JPG

There might be a chance Bachmann has optivised the decoder for this issue. The DCC ready usually have the caps and inductors. Mine did.

Rich

If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.

  • Member since
    October 2006
  • From: Western, MA
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Posted by richg1998 on Thursday, July 20, 2017 9:05 PM

Adding to what Randy said, below is a link about the caps used in Bachmann locos. No caps, the two 4.7 microhenry inductors are a moot point. The same as a straight piece of wire.

Some locos, they are mistaken for resistors.

https://sites.google.com/site/markgurries/home/dcc-problems/decoder-problems/motor-control/poor-motor-control-on-bachmann

Rich

If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.

  • Member since
    July 2017
  • 20 posts
Posted by Edsland on Thursday, July 20, 2017 8:43 PM
Maybe while looking at you .50 reading pick the locomotive off the track and see if the meter goes to zero.
  • Member since
    February 2002
  • From: Reading, PA
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Posted by rrinker on Thursday, July 20, 2017 8:39 PM

 The Sound Value locos most definitely do noto have a keep alive in them. Anyway that would only draw current at initial power on while it charged.

 Being a bachmann loco, it almost certainly has capacitors and inductors in the motor drive, but those too will cause no power draw or variation unless the motor is actually running.

                                 --Randy

 

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    July 2006
  • From: Phoenix, AZ
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Posted by bearman on Wednesday, July 19, 2017 4:15 AM

then my guess is the answer is yes because I think this is one of the newer locomotives.  And it runs great.

Bear "It's all about having fun."

  • Member since
    November 2011
  • From: Long Island
  • 130 posts
Posted by robkoz on Wednesday, July 19, 2017 4:12 AM

bearman

Capacitors?  Beats me.  But I have been in touch with Bachmann and everything is gong to be cool.

 

 
A lot of the newer DCC equipped locos have capacitors to keep the train moving for those 'dirty' powerless spots on the track.
  • Member since
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  • From: Phoenix, AZ
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Posted by bearman on Wednesday, July 19, 2017 3:10 AM

Capacitors?  Beats me.  But I have been in touch with Bachmann and everything is gong to be cool.

Bear "It's all about having fun."

  • Member since
    November 2011
  • From: Long Island
  • 130 posts
Posted by robkoz on Wednesday, July 19, 2017 2:54 AM

Is it equipped with capacitors? Would that be the amperage draw?

  • Member since
    July 2006
  • From: Phoenix, AZ
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Posted by bearman on Sunday, July 16, 2017 2:25 PM

Randy/Selector...It is over 0.5amps and the speed is set to 000.  It is the only locomotive that behaves that way, which is why I thought something might be amiss.  F8 does not work and neither does Emergency Stop, pressed once.  I think I am going to set the decoder back to the factory default settings, reprogram it, and if the phenomenon continues, then a phone call to Bachmann might be in order.  Either that or a trip to Litchfield Station. 

Some time ago, I swore off Bachmann, but after reading some reviews of this locomotive I bought it, and it runs great.  Except for this problem.  I have 2 RS2's and this RS3 which fit into the 1950s/early 60's and I like the way they look.  

PS:  All my other decoders draw less than 1/2 amp as the locomotives choo choo down the track.

 

Bear "It's all about having fun."

  • Member since
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  • From: Vancouver Island, BC
  • 23,330 posts
Posted by selector on Sunday, July 16, 2017 2:20 PM

Over the past several years, decoders have been using less and less amperage to perform the same amount of work, including emitting their sounds.  When I first entered the hobby 12 years ago, the typical sound decoder would use 0.6 - 0.8 amp to haul maybe 12 cars worth of resistance in train weight and make sounds at a reasonable volume.  If an idling modern decoder is using up anything close to half an amp with no motive output, and just making noises, there's either a problem with the decoder or a problem with the measurement.

  • Member since
    February 2002
  • From: Reading, PA
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Posted by rrinker on Sunday, July 16, 2017 1:34 PM

 Over half an amp with the motor not turning seems WAY excessive. If the display is accurate, something else seems amiss. Sure it's at speed 0, and not instead at step 1 and slowly trying to push past the end of the track or something?

                            --Randy


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    July 2006
  • From: Phoenix, AZ
  • 1,835 posts
Posted by bearman on Sunday, July 16, 2017 12:28 PM

Peter I understand your skepticism, but if it is drawing less than what the display indicates, then there is a problem with the display.

Bear "It's all about having fun."

  • Member since
    March 2010
  • From: Sherwood Park, Alberta, Canada
  • 252 posts
Posted by CNR378 on Sunday, July 16, 2017 12:09 PM

There isn't a CV for this in this decoder. Your best bet is to use the F8 to mute the sound.

 I really doubt you are drawing over half an amp with this locomotive at idle. I wouldn't expect it to be drawing much more than a quarter amp when running, personnally.

Peter

  • Member since
    July 2006
  • From: Phoenix, AZ
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Posted by bearman on Sunday, July 16, 2017 11:01 AM

You are correct Rich, it is not drawing full amps.  It is drawing 0.56-0.61 amps according to the NCE Powercab redout.   I think that is a little high when you consider that the Powercab is a 2 amp system, but then again I am a bit on the electricity challenged side.  and I have been trying to and continue to see if I can find something in the manual.  Even just turning down the volume would be better.

Bear "It's all about having fun."

  • Member since
    July 2006
  • From: Huntsville, AR
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Posted by oldline1 on Sunday, July 16, 2017 9:59 AM

It's using very little power just sitting there............or working. If the sounds are bothersome when it's idle in the yard you might gap a rail and make a dead section to store the engine. Install a switch to kill the power to that particular location and when the RS pulls in and is ready for a "time out" you just turn the switch off and the egine will be dead and quiet until you flick the switch and want or need the engine again.

oldline1

  • Member since
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  • From: Western, MA
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Posted by richg1998 on Sunday, July 16, 2017 9:00 AM

It is not drawing amps, only milliamps. Much less than one amp.

Hit F8. Found in the Bachmann forums.

You could also try hitting emergency stop.

What does your DCC controller manual say?

Rich

If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.

  • Member since
    July 2006
  • From: Phoenix, AZ
  • 1,835 posts
Bachmann RS-3
Posted by bearman on Sunday, July 16, 2017 4:44 AM

I have the Bachmann RS-3 and am pleased with the way it runs.  However, when it sits there idle on the turntable or in the yard it is chuffing away and soaking up amps.  Is this a CV configuration issue?  I would prefer that when it is not in service that it just sit there quietly.

Bear "It's all about having fun."

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