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PIONEEIrt
ANTENNAS AND
GROUND CONNECTIONS
FM ANTENNA
FM
broadcast are considerable weakened
by
intervening
mountains, buildings,
etc. or
if
the
antenna
is inside
a
concrete building.
This
should
be
considered
when
deciding upon the
type
and
location
of the
FM
antenna.
Connection and Location
For
areas
with a
strong signal, especially
in
wooden
houses, use
the T-type indoor antenna (supplied).
.
As shown
in
Fig.
6, first
connect the antenna leads
to
the proper terminals on the rear
of
the QX-646. Then
spread
out the
cross
section and
attach
it
to
a
wall,
etc.
after deciding upon the
best
location by listening to
an
FM
broadcast and
watching the SIGNAL meter deflect
(see
the explanation on p. 14).
When
a
special
FM outdoor antenna
is
required...
. If
there is a great deal
of
noise during FM reception
using
this
antenna, replace
it
with
a
special
FM
outdoor
antenna
(or
a
combination FM/TV
antenna).
connect
it to
the
proper terminal(s), as shown
in
Fig.7.
NOTES:
l.
FM
antennas
are
available
in
any
type.
Select
the
best
type
after
securing the advice
of
your
audio
dealer.
2.
In
heavy
traffic
areas,
industrial
zones
or
near high'voltage
electrical
equipment,
a
great
deal
ol
interference
tnty
enter
despite
careful
antenna selection.
In
such
a
case,
talk
things over
with your
audio
dealer.
It
mty
be
advisable
to
use
a
75C.
coaxial cable between
the
antenna
and the
QX-646. Connect
to
the
cable terminal
as
shown
in
Fig.
7.
AIII ANTENNA
First tune in
an
AM station
(see
the explanation on p. 14).
Then, while watching the SIGNAL meter deflect,
adjust
the AM ferrite
antenna on the rear panel
for
the
best
signal
(see
Fig. 9).
1.
If
the ferrite
antenna does
not provide satisfactory AM
reception, connect the vinyl-sheathed AM lead antenna
to
the proper terminal. Stretch
it
out with the
other
end
as
high
as
possible
(see
Fig. 6).
2.
If
reception is still poor, construct an outdoor antenna
between
two
poles, etc., as shown
in
Fig.
7.
Use
vinyl-sheathed lead, and connect
to
the QX-646
AM
antenna
terminal.
GROUND
F'or optimum
safety and noise-free performance,
it
is
desirable
to
connect the GND terminal to
a
good ground
(see
Fig.
7).
Strip
the coaxial cable
as
shown
in
(A).
Loosen the
screws
and connect the cable
as
shown
in
(Bl.
Then
tighten all
screws
for
a
connection
like
(C).
Fig. 8
DIRECTION
OF
BROADCAST
ANTENNA
FM
oUTDOOR
ANTENNA
Fig.6
AM
OUTDOOR ANTENNA
Fig.7
GROUND
INNER
CONDUCTOR
@
OUTER
SHIELD
(BRAID)E
CABLE
(75-ohm)
FM
INDOOR ANTENNA
AM LEAD
ANTENNA
AM
FERRITE ANTENNA
Fig.
9
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