Athearn GP60 Decoder Installation featuring the RTR-MB1 Motherboard with Keep-Alive™, WOW121-Diesel Decoder, and UNIV-SH4-C Speaker Kit by TCS

These items are available in the WDK-ATH-10 which was used for this installation.
RTR-MB1 Motherboard with Keep Alive™ WOW121-Diesel Decoder UNIV-SH4-C Speaker Kit
Click here for more information on the WDK-ATH-10 and the rest of the WOWDiesel Kits line.

Important Soldering Tip:
Please do not use any flux either liquid or paste on the mother board. It will damage it. Use only Rosin core solder approved for electronics use.
We recommend to use only Kester "44" rosin core, SN63PB37, .015" diameter, part number 24-6337-0007.
This can be ordered from Techni-Tool under Techni-Tool part number 488SO157

http://www.techni-tool.com

Athearn GP60 prior to the installation. To begin this installation, carefully grasp the sides of the shell and pull outward
on each side and the shell should lift right off the chassis.

 

Shown here with the shell removed.

   

The original lighting will need to be removed. To do this, on the front tab, carefully pry apart the small metal tabs holding it in place and lift it up and out.
We will later use this connection point to facilitate the front track pick up.


Shown with the front lighting assembly removed.



In the next step. we will remove the entire motor assembly. On the bottom of the frame are four plastic buttons. Using a screwdriver or blunt probe, carefully push these buttons in towards the frame to release the motor.


Shown with the motor assembly removed.

With the motor out of the locomotive, remove the plastic tabs from the bottom of the motor.

Next, remove the metal motor power clip found underneath the tabs from the bottom of the motor, being careful to be mindful of the small spring
underneath that will come out with it.

Bend the raised tabs flat into the metal around it to minimize them and solder the positive (orange) motor lead to the top of this strip.

Reattach the completed metal clip and spring and cover it with Kapton tape to insulate it.

 

For the second track pick up lead, solder a connection point to the top of each tab as shown above.

To insulate the new motor connections from the frame, place a small strip of Kapton tape on top of the original connection point in the bottom of the frame.
Reinsert the completed motor back onto the frame at this point.

Shown with the motor assembly reinstalled and wired.

To allow for one track pick up lead, solder two connection points to the original front light post.

Detail showing the front track lead connection points soldered.

Solder the track and motor connections to the RTR-MB1 according to the manual provided with your motherboard.

With the motor and track leads completed, drill a 1/8" hole into the speaker housing in a way that it will freely port into the locomotive. We have found that introducing 
a port of this size greatly enhances the volume and sound quality of this installation. Using hot melt glue, mount the UNIV-SH4-C enclosure with the 25mm X 14mm speaker assembly into the top rear of the shell. Solder the leads for this speaker onto the RTR-MB1 motherboard as shown above.

Using a dab of hot melt glue, mount LEDs in place and solder the leads to the RTR-MB1 as indicated in the included wiring diagram.
The RTR-MB1 has installed resistors and you do not need to add in line resistors..

        

In order for the shell to refit onto the frame properly in this installation, it is necessary to trim the interior portion of the fan assembly, which drops down inside the shell below the top cap. Using a trimming blade, carefully remove this section as shown above. There are two weights which are found in this top compartment.
One will be removed and the other reinserted in this top section prior to reinstalling the top cap.

Lastly, in order to keep the wires neat and prevent possible shorts, lace the wires into a bundle using lacing cord, which is a wax impregnated string 
used for wire bundling and making harnesses. There are many choices of lacing cord available from Digikey www.digikey.com
We use part number 802534B BK032-ND

Now you can close up the locomotive. Be sure to be mindful of wire routing and reassembly of the shell as to not damage 
or foul the installation. Your Athearn GP60 is now WOWSound equipped and ready to roll!


Other solder tips: When stripping wire, only strip a tiny little bit of the insulation. Strip no more then a 1/64 of an inch. When the wire gets tinned with solder the insulation will shrink back more. Try to not expose any more wire then half the length of the solder pad at most. In no case should solder or exposed wire wire ever be outside the boundary of the the solder pad you are attaching a wire to.
Click here for important information on properly Stripping and Tinning wire

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