This installation is for a HO-Scale Athearn RS-3-L using a TCS WOW101-Diesel Decoder, KA4 Keep Alive™
and UNIV-SH4-C WOWSpeaker kit by TCS.
HO-Scale Athearn RS-3-L prior to installation.
To begin, remove the shell from the chassis by removing the two screws highlighted in red above, located underneath the trucks on either side of the
frame and then gently squeezing and lifting the shell.
HO-Scale Athearn RS-3-L with the shell removed.
Keeping the original lighting board in place, unplug the shorting plug, disconnect the wiring from the original circuit board, trim, tin or lengthen the
wires as necessary and re solder them to the board.
Working inside the shell, carefully stretch the cab to the left and right to remove the plastic tabs from the rest of the shell and lift the cab cover from the shell.
Here you can see the available space for the speaker assembly.
Using double sided foam tape, place the KA4 with Keep Alive™ into the the top rear of the shell.
Carefully drill two .038mm holes through the shell (beneath the cab) to allow a path for the speaker leads.
Remove and trim the plastic tray in the front of the locomotive to accommodate the WOW101 decoder.
As with the front tray, remove and trim the back/upper half of the rear tray to allow space for the KA4
which was placed into the top of the shell above this location.
For this installation, we trimmed the UNIV-SH4-C Speaker Enclosure to ensure a tight fit under the upper cab and painted it
black to minimize its appearance inside the cab windows.
Insert the 25mm X 14mm speaker into the UNIV-SH4-C enclosure and mount this assembly utilizing double sided foam tape centered onto the chassis.
Wire the speaker leads into the rear WOWSound harness.
Using hot melt glue, we added a small 'transmission' dab inside each headlight port and then added a LED into each end, facing out.
In this installation, as the voltage coming off of the original lighting board was insufficient with the large resistor already in place,
it was necessary prior to soldering the LEDs to the board to bypass this resistor and install a 1k ohm resistor inline to these LED's. See the highlighted resistor above.
In this step, plug the rear harness into the WOW101 Decoder and the decoder then into the lighting board.
Using double sided foam tape, securely mount the WOW101 Decoder in the plastic tray and then this assembly onto the chassis.
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
Reattach the shell back onto the chassis, reinserting the bottom screws and your Athearn RS-3-L WOWsound equipped locomotive is ready to roll!
Click here for important information on properly Stripping and Tinning wire
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