F7-B Diesel Locomotives
with Sound, Unpowered
THE PROTOTYPE
To increase the pulling power of
its popular F7-A locomotive,
General Motors’ Electro Motive
Division (EMD) designed a mat-
ching diesel locomotive without a
cab. This „B-unit“ could be coup-
led to one or more F7-A locomoti-
ves and controlled by a single
engineer in the cab of the „A-unit.“
THE MODEL
This unpowered F7-B model is
designed to be used with the LGB
F7-A models. This „B-unit“ fea-
tures:
- weather-resistant construction
- prototypical livery and lettering
- brass grab rails
- digital electronic sound system
- cylinder clearing sound
-
„notch“ synchronized diesel
motor sounds
- horn sounds (starting, crossing)
- bell sounds (starting, crossing)
- „High Ball“ announcement (with
Multi-Train System)
- cab alarm bell (with Multi-Train
System)
-
braking sounds (application,
pressure release)
- magnetic bell and whistle trigger
- idle sounds (up to 30 seconds)
- built-in speaker
-
reliable „flat“ multi-purpose
socket
- length: 600 mm (23.6 in.)
- weight: 2100 g (4.6 lb.)
THE PROGRAM
This model is part of the LGB pro-
gram of quality G-scale trains and
accessories. With this model, we
recommend:
50100 JUMBO Power Pack,
230V, 24V, 10A
50101 JUMBO Power Pack,
110V, 24V, 10A
55000 Multi-Train System Starter
Pack
For more information on the com-
plete LGB program, see the LGB
catalog.
OPERATION
Preparation
This model is made for use with
LGB F7-A models. The electrical
connection between the „A-unit“
and the „B-unit“ is made with two
cables (Fig. 1, 3):
- a two-wire „track power“ cable
- a four-wire „electronics“ cable
for sound and Multi-Train
System electronics
In all arrangements of units (for
example, A-A, A-B, A-B-A),
connect all the units together with
two-wire track power cables.
However, only use the four-wire
electronics cable to connect B-
units to A-units. Do not use the
four-wire electronics cable to
connect two B-units together or
two A-units together.
Attention! If you connect two B-
units together with the four-wire
sound cable, the sound amplifiers
in the B-units may be damaged.
Hints:
- One two-wire track power cable
is included with each A-unit. Two
four-wire electronics cables are
included with each B-unit.
- For proper operation of the horn
and bell sounds, place the B-
unit on the track with the rear
wall (Fig. 1) facing the rear of the
train (opposite the normal direc-
tion of travel).
Operating Modes
This model is equipped with one
speaker and two amplifiers. To
control the amplifiers, this model
has a three-way sound control
switch on the rear wall (Fig. 2):
Position 0: Sound off.
Position 1: The speakers in the
front and rear A-units
are on. This position is
for an A-B-A combina-
tion. The speaker in
the B-unit is off.
Position 2: The speakers in the
front A-unit and the B-
unit are on. This positi-
on is for an A-B combi-
nation.
A volume control on the rear wall
controls the volume of both spea-
kers.
Sound
This model features a digital elec-
tronic sound system. All of the
sounds are real sounds. The
sounds were converted from ana-
log to digital and then stored as
data. When you operate your
loco, the data is converted back
into sounds.
The sound electronics are activa-
ted at speed control position „1.“
(All speed control positions are
approximate.) First, the cylinder
7
GB
USA
