Advertisement
Quick Links
cee
[Shame]
SPECIFICATIONS
Frequency Range
EM coonmudestiteccagestens
88 ~ 108 MHz
Intermediate Frequency
_
Pecunia
10.7 MHz
Power Supply .......000 DC 6V (UM-2% 4)
AC 120V_ 60Hz
Power Output
—Undistorted ..........
500mW
Maximum
......cee0
800mW
Speaker ......ccsssereseeees
13cm X9cm Voice Coil
Impedance 8 ohm
Dimensions
.......seeeeee 28.5cem (W) X18.5em (H) X
|
7.5em (D)
Transistor Complement
Q6
=
2SA234(C) ........ 2nd FM IF Amplifier &
1st AM IF Amplifier
Q7
2SA234(B) ........ 3rd FM IF Ainplifier &
2nd AM IF Amplifier
Q8
2SB 75(B) ......... Audio Amplifier
Q9
Z29B/7(B) -stscesanns Audio Driver
Q10, Q11 = =2SB77(B)_........ Output (Matched Pair)
Q12
2SB156(B)
........ AC Power Stabilizer
_
GENERAL DESCRIPTION
The circuit used in this 4 band portable radio incorpo-
rates 12 transistors, 5 diodes, 2 rectifiers and I thermistor.
A ferrite bar antenna feeds the AM signal to the AM
mixer a telescopic rod antenna feeds the AM signal to the
AM
mixer and two 1F amplifiers and a diode detector.
A telescopic rod antenna feeds the FM signal to the
FM
RF amplifier, FM converter, 3 IF amplifiers and
two
diodes
FM detector.
|
Audio
signal passes through the 4 transistors audio
amplifier circuit.
|
|
An AM
AVC voltage is fed back to the 1st IF.
amplifier.
A FM
AVC
voltage
is fed back to the FM RF
amplifier. _
|
An
AFC
voltage
is fed back to the FM
converter
(oscillator).
Advertisement
