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12 volt bulb question for DCC GP7

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  • Member since
    July 2006
  • From: Londonderry New Hampshire
  • 518 posts
Posted by Great Western Rwy fan on Monday, May 26, 2008 3:32 PM
What size LED would You use and with what size resistor? Ho scale, MRC System with MRC decoder
  • Member since
    December 2004
  • From: WSOR Northern Div.
  • 1,559 posts
Posted by WSOR 3801 on Monday, May 26, 2008 8:30 AM

NCE also makes a drop-in decoder that uses the 1.5 volt bulbs: P2K-SR. 

The Digitrax DH165LO has the plug to add a Soundbug, if you are into that.  

Both install easily: unplug from the circuit board, remove factory circuit board, plug into decoder, place decoder where old PC board was. 

Mike WSOR engineer | HO scale since 1988 | Visit our club www.WCGandyDancers.com

  • Member since
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  • From: Orig: Tyler Texas. Lived in seven countries, now live in Sundown, Louisiana
  • 25,640 posts
Posted by jeffrey-wimberly on Monday, May 26, 2008 8:08 AM
Depending on the decoder that could be too much. Check with Radio Shack. They have 12v bulbs that draw only 25 milliamps.

Running Bear, Sundown, Louisiana
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  • Member since
    July 2006
  • From: Londonderry New Hampshire
  • 518 posts
12 volt bulb question for DCC GP7
Posted by Great Western Rwy fan on Monday, May 26, 2008 7:47 AM
I am switching from DC to DCC and the instructions for My P2K Gp7 say to change the bulbs to  12 volts/50 milliamps. My LHS has bulbs that are 12 volts/80 milliamps will those  work or would they draw too much power?

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