Mobile Operation; Installation - Kenwood TS-440S Instruction Manual

The ante n n a to be used s h o u l d f i rst be c h e c ked w i t h
a d i p m e t e r to i n s u re t h a t it i s d e s igned for y o u r o p e r ­
at i n g b a n d , then the i m pe d a n c e m atc h ing s h o u l d b e
c h e c ked w it h a n S W R mete r . ( F i g . 8-3)
T h e V S W R s h o u l d prefera b l y be less t h a n 1 . 5 : 1 for
stisfactory operat i o n . F o r a nte n n a adjustment refer to
t h e a nte n n a i n struction m a n u a l .
(4)
Antenna matchin g
In g e n e r a l , m o b i l e a ntennas h a ve a l o w e r i m pe d a n c e
t h a n the 50-o h m c o a x i a l c a b l e u se d to feed t h e m ,
resulting in a m i s m at c h between t h e a n t e n n a a n d the
coax. Such trouble c a n be e l i m i n ated by using a n a n ­
t e n n a t u n e r between t h e t r a n s c e i v e r a n d t h e c o a x i a l
c a b l e .
o
Match in g ci r c u it exam ples
8-2 . MOBIL OPERATION
8-2- 1

Installation

.
R o ute battery a n d A N T E N NA l e a d s a w a y from a l l h i g h
voltage s e c o n d a ry c i r c u it s to prevent i g n it i o n n o i s e i n ­
terfere n c e .
Antenna
,��,:
Example of (power cord ) wiring
36
L o a d i n g c o i l
S i nce an
s t a n d h i g h w i n d s t re s s .
through the drain hole.
B u m p e r
8-3
Fi g . Adjustin g Antenna Resonance
To a n t e n n a t e r m i n a l
HF
a n t e n n a is l a rg e a n d h e a v y , it m u st be i n st a l l e d to w i t h ­
t
A d j u s t l e n g t h
G r i d D i p m e t e r
8-4
Fi g .