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2-3 .2. POWER REQUIREMENTS.
CAUTION
. OperaLion of the T. R-7 \\·ith an incorrect
pow ,ir source will result in serious darn-
age and may void the warranty.
Operating voltage for the TR-7 is 11 to 16 VDC.
V oltages outside this range may either damage the
transceiver or cause improper operation. The nomi-
nal recommended operating voltage is 13.6 VDC at
a current of 3 amperes in r eceive and 25 amperes
peak in transmit. ·
The rear panel power connector (P-404-AB) has a
mating receptacle (S-404-CCT) which is polarized .
See figure 2-1 for proper connections, and figure
2-2 for rear panel connector locations . Be sure to .
. ' ,,;,..
c'INCH JONES (or equiv.)
S-404-CCT
. (Rear View)
14
13
o
16
Pin NO.
13
15
14
16
wire the power · connector exactly as •shown to
avoid damage to the transceiver . It is recommended
that # 10 stranded wire be used to wire the power
co nnector directly to the vehicle battery, and that
a fuse or circuit breaker rated at 30 amperes be in-
stalled in the positive supply line clase to the
battery .
A defective generator or alternator diode may
cause excessive generator noise or alternator whin e.
Defective ignition wiring or components may result
in an undesirable leve! of ignition noise in the re-
ceiver. Reference texts such as the ARRL Hand-
book
provide additional details on treating these
problems.
Function
High current +13.6 Vdc
Low current +13.6 Vdc
Gnd
Gnd
30A
Fuse
· • .
Vehicle
Battery
+
Figure 2 - 1. TR -7 Power Connection
2-3
TR7 OPERATOR 'S MANUAL
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