Noise Reduction; Battery Capacity - Kenwood TS-440S Instruction Manual

8-2-2.

Noise reduction

In m ot o r v e h i c l e s , n o i se is g e n e rated by t h e i g n it i o n
syste m . O t h e r s o u r c e s of n o i s e i n c l u d e t h e w i pe r a n d
h e a t e r m otors .
A lt h o u g h t h e t r a n s c e i ve r · is e q u i p p e d w i t h a n o i s e
b l a n k e r to m i n i m ize i g n i t i o n n o i s e , it i s i m p e r a t i ve t h a t
some preve ntive measu res be t a k e n to r e d u c e the noise
to t h e lowest p o s s i b l e l e ve l .
I
( 1
A n te n n a location selection
S i n c e i g n it i o n n o i se i s g e n e rated by t h e v e h i c l e s e n ­
g i n e , t h e a n t e n n a m u st be i n sta l l e d a s f a r f r o m t h e e n ­
g i n e a s pos s i b l e .
( 2 ) B o n d i n g
T h e c o m p o n e n t p a rts of m otor ve h i c l e s , s u c h a s t h e
e n g i n e , transm ission , m uffler syste m , accelerator, etc . ,
a re c o u p l e d t o one a n o t h e r a t D C a n d l o w fre q u e n c i e s ,
b u t a r e i s o l ated at h i g h freq u e n c i e s . B y c o n n e c t i n g
t h e s e p a rts u s i n g h e a v y , b r a i d e d g ro u n d stra p s , i g n i ­
t i o n n o i s e c a n be r e d u c e d . T h i s c o n n e c t i o n i s c a l l e d
" bo n d i n g " .
(3) Use ignition su ppressor cable o r su ppressor spark
pl u gs
N o ise c a n b e r e d u c e d b y using spark plugs w it h i n t e r ­
n a l resistors , o r r e s i s t i v e s u p p r e s s o r i g n it i o n c a b l e .
8-2-3 .

Battery capacity

T h e p o w e r system of a m o t o r ve h i c l e is c o m p r i s e d of
a battery a n d an a lt e r n a t o r ( w h i c h g e n e rates p o w e r
w h i l e t h e e n g i n e i s r u n n i n g ) to s u p p l y c u rrent to l o a d s
o r to c h a rge t h e battery .
S i n c e t h e t r a n s c e i v e r d r a w s h i g h c u rrent d u r i n g t r a n s ­
m it , c a r e s h o u l d be e x c e rs
i s not overlo a d e d . When using the t r a n s c i e v e r , the fol­
l o w i n g points s h o u l d b e o bserved f r o m t h e v i e w pont
of battery m a i n t e n a n c e :
1 .
T u r n t h e t r a n s c e i v e r O F F w h e n t h e l i g h t s , h e a t e r ,
w i pe r s a n d ot h e r h i g h - d r a w a c c e s s o r i e s a re u s e d .
A v o i d t r a n s c e i v e r operation w h e n t h e e n g i n e is not
2 .
r u n n i n g .
3 . If n e c e s s a r y , u s e a n a m m e t e r a n d /o r a voltmeter
to check battery c o n d i t i o n .
(
sed so t h e p o w e r system
37