INSTALLATION
Since there is no motor output in this sound decoder, it can be used in any locomotive, regard-
less of scale that already has a working power decoder installed. If used in large scales where
track voltage exceeds 16 volts, (O/G scales), a special voltage reducer is required to be used
in-line to the Sounder. Contact Model Rectifier Corp. for details and price.
To install the Sounder into a locomotive, simply solder the red and black wires to any power pick
up points, left and right side wheel pick ups, along with the red and black wires of your power
decoder. If using with higher voltage DCC applications for larger scales, solder the MRC voltage
reducer to either the red or black wire between the Sounder, and the power pick up point. You
should have some basic electrical knowledge and soldering skills. If you do not have the above
requirements, please ask the dealer for help with the installation.
SPEAKER SELECTION
The “MRC Sounder” steam sound only decoder comes with a 28mm round 8-ohm speaker. If it is
too large for your application, smaller speakers, 20mm, or 16 X 35mm rectangular, can be
purchased from MRC, or other manufacturers. Reducing speaker size will affect the overall
sound quality of this decoder. Placement of the speaker inside the locomotive is up to you. Use
hot glue or double-sided sticky tape to affix the speaker inside the locomotive shell.
OPERATION
There are 34 whistles sounds and 8 bell sounds, along with an “off” setting for each built into
this decoder for you to choose from. See programming chart for selecting the type you want.
The “off” setting is useful for trailing locomotives in a consist so only the lead unit sounds its
whistle and bell.
If your DCC system supports higher functions,
F13
to
F28
, you can use these functions to
change the type of bell sound,
F18
, or horn sound,
F19
on the move, without having to go into
“ops mode” programming or by changing CV values.
*Note- If you activate the bell sound,
F1
, while either the Rail-Wheel Clack
sounds are activated, the Bell sound will override the other two sounds.
Fu
nc
ti
on
Idl
e
/M
o
vi
ng
F
0
H
ead
lig
ht
on
/o
ff
F1
B
el
l on
/o
ff
F2
W
hi
st
le
F3
A
ir re
le
as
e
F4
C
oup
ling
F5
B
rak
e r
el
eas
e (
id
le
) /
br
ak
e s
quea
l (
m
ov
in
g)
F6
C
on
du
ct
or
w
hile
id
le
/R
ai
l w
he
el c
la
ck
w
hi
le
m
ov
in
g
F7
Fi
re bo
x op
en
/c
los
e
F8
In
je
ct
or
F9
M
eta
l c
ra
nk
s
oun
d on
/o
ff
(
m
ov
in
g)
, s
tea
m
a
ss
oc
iat
ed
s
ou
nd
(
idl
e)
F1
0
W
at
er
in
je
ct
or
F1
1
B
lo
w
er
h
is
s
F1
2
S
ound
on/
of
f
F1
3
C
oal
aug
er
F1
4
A
ir
hos
e f
iri
ng/
unc
oup
ling l
ev
er
F15
Fl
ang
e no
is
e
F1
6
S
ho
ve
lin
g
F1
7
C
ra
sh
s
ou
nd
F1
8
C
han
ge b
el
l ty
pe
(
us
e
F1 to
tu
rn of
f be
ll
af
te
r adj
us
tm
ent
)
F1
9
W
hi
st
le
ty
pe s
el
ec
t (
to
tal
3
4 di
ff
er
en
t o
nes
)
F2
0
B
el
l r
at
e
cha
nge
(
us
e F
1 to
tu
rn of
f be
ll
af
te
r adj
us
tm
ent
)
F2
1
C
ha
ng
e
be
ll v
ol
um
e (
us
e F
1 to
tu
rn
of
f
be
ll a
fte
r a
dj
us
tm
ent
)
F2
2
C
han
ge
w
hi
st
le
v
ol
um
e
F2
3
C
han
ge
c
hu
ff
v
ol
um
e
F2
4
C
hu
ff
ty
pe s
el
ec
t (
to
tal
2
4 ty
pe
s)
F2
5
a
ir
re
le
as
e
F2
6
sa
nd
d
rop
pi
ng
F2
7
A
sso
ci
at
ed
lo
co
so
un
d
F2
8
A
sso
ci
at
ed
lo
co
so
un
d
C
V
R
eg
is
ter
D
escri
p
ti
o
n
R
an
g
e
D
ef
au
lt
CV
1
R
1
S
hor
t addr
es
s
1-
127
3
--
-
R
6
P
age num
be
r
--
-
--
-
CV
29
R
5
B
as
ic
c
onf
igur
at
ion
--
-
2
CV
7
R
7
M
anuf
ac
tur
er
v
er
s
ion
num
ber
--
-
32
CV
8
R
8
M
anuf
ac
tur
er
ID
--
-
143
CV
17
--
-
Long addr
es
s
uppe
r by
te
192-
231
192
CV
18
--
-
Long addr
es
s
lowe
r by
te
0-
255
3
CV
19
--
-
A
dv
anc
ed c
ons
is
t ad
dr
es
s
0-
127
0
CV
50
--
-
W
his
tle t
ype
0-
33
4
CV
51
--
-
W
his
tle v
olum
e
0-
3
3
CV
52
--
-
B
ell t
ype
0-
6
3
CV
53
--
-
B
ell v
olum
e
0-
7
3
CV
54
--
-
B
ell r
ing r
at
e
0-
50
3
C
V
55
--
-
C
hu
ff
ty
pe
0
-
11
3
CV
56
--
-
Chuf
f v
olum
e
0-
3
3
CV
57
--
-
B
rak
e s
queal v
ol
um
e
0-
3
3
CV
58
--
-
A
ir
r
eleas
e v
olu
m
e
0-
3
3
CV
59
--
-
B
lower
his
s
v
olum
e
0-
3
3
CV
60
--
-
F
ir
e box
door
v
olu
m
e
0-
3
3
CV
61
--
-
Injec
tor
v
olum
e
0-
3
3
CV
62
--
-
Coupling v
olum
e
0-
3
3
CV
63
--
-
A
ir
pum
p v
olum
e
0-
3
3
CV
64
--
-
Rail c
lac
k v
olum
e
0-
3
3
CV
105
--
-
Us
er
ident
ific
at
ion nu
m
ber
0-
255
0
CV
106
--
-
Us
er
ident
ific
at
ion nu
m
ber
0-
255
0
CV
112
Conduc
tor
v
olu
m
e
0-
3
3
CV
113
Random
s
ound en
able
0-
1
1(
ena
ble)
CV
114
--
-
B
rak
e r
eleas
e v
o
lum
e
0-
3
2
C
V
117
--
-
C
hu
ff
rate
0
-10
1
CV
119
Coupling f
ir
e v
olu
m
e
0-
3
3
CV
120
A
cc
eler
at
ion
0-
32
0
CV
121
Dec
eler
at
ion
0-
32
0
CV
122
Double c
huf
f ena
ble
0-
1
0(
dis
ab
le)
CV
123
Chuf
f s
tar
t r
at
e adjus
tm
ent
0-
4
1
CV
125
--
-
Fa
ct
or
y d
ef
au
lt s
et
tin
g,
p
ro
g
ra
m
it
to
1 w
ill
res
tor
e al
l t
he C
V
to def
aul
t s
et
tng
---
0
0
CV
21
--
-
W
hen C
V
21=
0,
al
l ac
ces
sor
y f
unc
tions
w
ill
fol
low
it
s ow
n addr
es
s.
W
h
en C
V
21=
1,
al
l
fu
nc
tio
ns
w
ill f
ollo
w
th
e c
on
sis
t addr
es
s
---
