DCC Impulses Column - 4
shrink tubing inside the decoder wrap. That makes one side of
the decoder flat. This flat side (right side in 3) is held down to
the brass plate (2) with thermally conductive epoxy. The heat is
conducted from the decoder into the brass plate and into the
frame of the locomotive. The heat that is conducted away in
this fashion will help keep the decoder cool.
With that technical stuff aside, let’s get started planning an
installation.
What will physically fit?
Sometimes things just work out. When you open up a loco to
put sound into it, you find a pre-made opening for a standard
size speaker (or two) and you are good to go. But that's not
always the way.
When converting older locomotives, frequently the installer is
left with the task of designing the acoustics as well as the nor-
mal issues of an installation.
5: Two 16 x 35 mm speakers in an HO scale Athearn Gen-
esis SD75M.
5
MRH-Jan 2014
