Sharp FV-1800 User Manual

GENERAL DESCRIPTION
The circuit used in this 6 band portable radio incorporates 17 transistors 13 diodes and 2 thermistors.
A
ferrite
bar
antenna
feeds
the
AM
broadcasting
signal
to
the
AM
mixer
and
a
telescopic
rod
antenna
feeds
the
AM
broadcasting
signal
to
the
AM
mixer,
2
IF
amplifiers
and
a
diode
detector.
A
telescopic
rod
antenna
feeds
the
FM
broadcasting
signal
to
the
FM
RF
amplifier,
FM
mixer,
3
IF
amplifier
and
FM
detector
(2 diodes).
The audio signal passes through a 5 transistor audio amplifier circuit.
An
AM
AVC
voltage
is
fed
back
to
the
1st
IF
amplifier.
An
FM
AVC
voltage
is
fed
back
to
the
FM
RF
amplifier.
An
AFC
voltage
is fed
back
to
the
FM converter.
FM — AM_ IF SECTION
ny
ma,
FM
TUNER
SECTION,
EM
SAM,
IF
SECTION
ang
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Q
Q
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FM
AV
:
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i
;
FM
RF
AMP
FM
MIX
|
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IF
AMP
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2nd
IF
AMP
=
3rd
IF
AMP
EM_DET
|
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Figure 1 BLOCK DIAGRAM

Sharp FV-1800 Specifications

General

Brand	Sharp
Model	FV-1800
Category	Radio
Language	English