User Guide

Sample Speaker Installations
It is best to have the sound projected up instead of down. To do so, locate the highest part of
the existing coal pile. Use a small, sharp, drill bit (#60) to open a series of holes within the
speaker cone diameter. Always drill slowly so the plastic does not melt.
Mount the speaker with "Hot Melt" or glue. Be sure to cover all sides of the speaker so no air
can escape.
Closed top Tender
In larger tenders with a lot of air passage between the
tender top and frame, it may becomes necessary to
make your own enclosure as shown here. Especially if
you don't want to drill the top open (or it's an oil burner).
6
Open top Tender
top view of completed speaker
installation.
Make a cardstock cutout with an opening for the speaker. Mount the cardboard cutout with "Hot
Melt" or glue. After the cutout sets, mount the speaker Be sure to cover all sides of the cutout to
the tender and speaker so no air can escape.
If you have other openings, be sure to close them.
Synchronization of Exhaust Chuff
Need extra ultra-miniature connectors, see item 757 and 758.
WHITE
RED
GREEN
BLACK
Switch Synchronization:
1 - connect Common (C) of the switch to the White wire from the SYNC input.
2 - connect Normally Open (NO) of the switch to the Black wire from the SYNC input.
Switch closure should occur on peaks of quartering lobes. We recommend using optics since
they can switch much faster, don't bounce, and do not interfere with the mechanical operation of
the axle.
Item #707, as shown, is a subminiature micro switch for this purpose, in lieu of using
optics (0.32"L X 0.1" W X 0.26" H).
Some engines already have switches installed. DO NOT use a leaf switch to the chassis
(quartering lobe) this will damage the sound unit!
For optical coupler (item #585) synchronization:
1 ...... connect Black and Green optical pickup wires together, this then connects to the Black wire
from the SYNC input.
2 ...... connect Red optical pickup wire to the Red wire from the SYNC input.
3 ...... connect White optical pickup wire to the White wire from the SYNC input.
It is not necessary to use the black / white stripe
pattern, anything that will come in and out of focus to
the optical reader will work! So, engines with cams
installed or a piece of rectangular tubing cut and
mounted to the axle may also work with proper
alignment. Remember, some paints and other type
markers will still reflect the infra-red light. So, just
because it's black doesn't guarantee that it will work.
The optical coupler comes with laser printed stripes.
Optical pattern
mounted on drive
axle
apply a thin layer of glue on
each side to prevent oil from
contaminating the optical
pattern.
Optical Coupler (hi-lighted for ease
of viewing) mounted to frame 3/16"
from optical end to pattern. In this
installation, the end mounting ears
had to be trimmed to obtain
clearance to the drive gear box.
When doing so care must be used
to not damage the optics.
Focus Distance
1/8" - 3/16"