Specifications

Page 14 FT-950 OPERATING MANUAL
INSTALLATION AND INTERCONNECTIONS
INTERFACING TO OTHER LINEAR AMPLIFIERS
NOTE
 The TX GND OUT pin (pin 2) of the LINEAR jack is
a transistor “open collector” circuit. It is capable of
handling positive relay coil voltages up to +60VDC at
200 mA or +30 VDC at 1 A. If you plan to use multiple
linear amplifiers for different bands, you must provide
external band switching of the “Linear Tx” relay con-
trol line from the “TX GND OUT” line at the LIN-
EAR jack.
 The specified range for ALC voltage to be used with
the FT-950 is 0 to -4 Volts DC.
 Amplifier systems utilizing different ALC voltages will
not work correctly with the FT-950, and their ALC
lines must not be connected if this is the case.
IMPORTANT NOTE!
 Do not exceed the maximum voltage or current ratings
for the “TX GND OUT” pin (pin 2) of the LINEAR
jack. This line is not compatible with negative DC volt-
ages, or AC voltages of any magnitude.
 Most amplifier control relay systems require only low
DC voltage/current switching capability (typically,
+12V DC at 25 ~ 75 mA), and the switching transistor
in the FT-950 will easily accommodate such amplifi-
ers.
Wire Color
Orange
Yellow
Green
Red
White
Blue
Violet
Brown
Black
Gray
Light Blue
LINEA Jack
(
Pin Number
)
1
2
3
4
5
6
7
8
9
10
Case
Function
+13.8 V
TX GND
GND
BAND DATA A
BAND DATA B
BAND DATA C
BAND DATA D
TX INH
EXT ALC IN
TX REQ IN
Shield
Linear Amplifier Connection Cable
(
T9207451
)
Color Code Information
TO
1
ANT
DC IN
2
FROM
GND
ROT
LINEAR
TUNER
PTT
REC
REM KEY
DMU CAT
EXT
SPKR
INPUT: DC 13.8 V
22 A
-T UNE
-T UNE
EERYALC
ACFUSEGND
RF INRF OUT
A
N
T
1
A
N
T
2
A
N
T
H
F
A
n
t
e
n
n
a
5
0
M
H
z
A
n
t
e
n
n
a
I
N
P
U
T
G
N
D
G
N
D
I
N
P
U
T
D
C
1
3
.
8
V
Antenna Cable (Not Supplied)
L
I
N
E
A
R
L
i
g
h
t
-
B
l
u
e
Linear Amplifier Connection Cable (T9207451: Option)
B
l
a
c
k
G
r
e
e
n
Y
e
l
l
o
w