Sharp GF-6060H - Page 11

“IF” curve
400 Hz, 30%, AM OSCILLOSCOPE
MODULATED MW/LW
SWEEP GENERATOR TEST LOOP BAR ANT.
AM IF
AMPLIFIER
SWEEP TRIGGER“VIWY
Figure 11—1
AC V.T.V.M.
SIGNAL MW/LW
GENERATOR TEST LOOP BAR ANT. EXT. SP
(J105, 106)
400 Hz, 30%, AM
MODULATED
Figure 11-2
i TO ROD ANT.
| 3 R = 30o0hm
Z = 50 ohm
—— = 10 PF
ie
Z:
Output
impedance
of
signal
generator
AC
V.T.V.M.
SIGNAL
Fg
TO
CHASSIS
Earth
(TP3)
GENERATOR EXT. SP
(J105, 106)
O
400
Hz,
30%,
AM
Earth
MODULATED
Figure
11-3
Note
A}|Check
the
alignment
of
the
receiver
antenna
coil
output,
loop
requires
less
inductance.
Change
loop
in-
by
bringing
a
piece
of
ferrite
(such
as
a
coil
slug)
near
the
ductance
by
sliding
the
bobbin
toward
the
center
of
ferrite
antenna
loop
stick,
then
a
piece
of
brass.
If
ferrite
increases
core
to
increase
inductance,
or
away
to
decrease
inductance.
output,
loop
requires
more
inductance.
If
brass
increases
—11=