The Master and the Slave (pt3)

Today I ignored the dark and wet weather outside and focussed on making sure my Class 13 would be a strong runner on digital control.

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As discussed in part 2, I will be installing two DCC decoders (one in each unit) and setting them to the same address.

IMG_5558LRI first modified the chassis casting of the slave and master units. Cutting away the lugs that formerly supported a small circuit board (now surplus to requirements).  This modification allows just enough space for a Bachmann 3-function decoder. Granted it is not quite enough space, thus a lot of the decoders soft outer shell needs cutting away to help it fit in the gap.

IMG_5573LRI then soldered the decoders into position and covered joins with shrink tube. This was my first time using shrink tube and I feel much more confident that my wires will not break apart as I move the loco and motors around.

Having built another model with a similar pick-up, motor and decoder arrangement I was keen to avoid a certain pitfall: If both motors and decoders pick-up from the same wheel sets, it is difficult to make separate adjustments to the decoders (without disconnecting the pick-ups).

IMG_5560LRTo avoid this problem, I wanted to build the Class 13 with some kind of pick-up connector, which would allow me to separate the pick-up’s for each unit (when needed). While wondering if I had such a connector I noticed the surplus circuit board from the Bachmann 08 includes just the thing!

I super glued the little plastic connector beneath the master unit chassis and wired the two pick-up sets together. The pick-ups are disguised as two hoses that are present on the prototypes buffer beams. All tension between the two units is focussed on the spring-loaded screw link coupling, thus these wires are loose, but kept in place by the 08s outer chassis.

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The Class 13 is now one of my best runners. The slow speeds I can get out of the two motors are quite impressive.

Next on the agenda is some filling and sanding.

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1 thought on “The Master and the Slave (pt3)

  1. reded23Eddie Jones

    What are the buffers you used, where can I get some ? I’m just about to start on my Class 13 😉

    Reply

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