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Dim Spectrum loco lights.

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  • Member since
    October 2006
  • From: Western, MA
  • 8,571 posts
Dim Spectrum loco lights.
Posted by richg1998 on Friday, October 3, 2008 1:09 PM

I checked the PC boards for a 4-6-0 and 4-4-0 locomotives since there has been questions in the past.

The 4-6-0 PC board the decoder is plugged into has  1,770 ohms resistance in series with the plus lead, blue wire,  for the LED. There is a diode in the minus lead, white wire, that drops the voltage by .7 volts. Good reason for dim lights when plugging a decoder into the PC board.

If you hard wire a decoder, a 1,000 ohm resistor is sufficient. I have done that with a Spectrum 4-4-0 and a Spectrum 4-6-0.

The Spectrum 4-4-0 PC board has 1,424 ohms in series with the blue lead and a diode in series with the white lead.

I suspect the PC board for the 2-8-0 must be about the sames.

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.

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