Table of Contents
Advertisement
430 MHz UNIT
The incoming signal is fed through RL1301 to the
two stage RF amplifier, consisting of Qi201 and
Qi 202
and then passed through a
(2SC2369),
selective filter to the doubly balanced diode mixer,
Dis o3 - D1s o6
(1SS43)
402-410
is mixed with a
28-30
producing a
MHz output signal which is
10
fed to the
M OUTPUT jack.
The local signal is generated at
oscillator Qi6oi
(2SC784R),
Qi602 and Q15oi
(2SC1424).
402-410
MHz is then passed through a selective
filter to buffer Qi s o2
(2SC1424
the mixer.
For transmission, the output from the transceiver
is delivered to the diode ring mixer, where it is
heterodyned
with
the
430-440
resulting in a signal of
then
fed
through
a
effectively
eliminates spurious responses.
signal is then amplified by Q1203
through another selective filter, then amplified by
the amplifier chain, consisting of Qi4oi
ALC AMP 0---
IOm
INPUT
6.-J
IOm
OUTPUT
where the incoming signal
MHz local signal,
67-68
MHz by
then multiplied b y
The local signal at
), for delivery to
local
oscillator
signal,
MHz . The signal is
selective
filter,
which
The
), fed
(2SC1424
(2SC1424),
70Cm UNIT(PB-19 29,1930,193 1,1932,1933, 1934 1935)
I
I
I
- - - -
-
- - -
I
01401
01402
I
2s;,:;24
2s;��6
I
I
I
I
01203
I
AMP
I
I
-
Ot'5al-0505
ISS43x4
,-
D8DM
01502
2SCl424
8UFF
L
_______ _ __ _ _____ ___ __ _ ______
Q1402
(2SC1426),
amplifier Qi3oi
from Qi 3oi is fed through a stripline filter, via
RL i 301, to the ANT jack.
A portion of the output from Li 3 06 is detected by
Di302
(1S188FM)
for control of the bias applied to
(2SC1815Y),
Q13oi. Qi204
(2SC1815Y)
automatic
final
portion of the output signal is rectified by Di 303
and fed to the meter, providing
(1S188FM)
indication of relative power output.
The supply voltage is regulated at
Qi6o3
(78L08).
-
-
-
- - -
-
- ___
01301
01 4
2�C�6
u:.-�:L
LPF
01202
0120!
2SC2369
2SC2369
AMP
RF AMP
RF
01501
01602
01601
2SCl424
2SCl424
2SC784R
2
x
x3
430-430MHz
67.000MHz
67.333MHz
432-434MHz
434-436MHz
67.666MHz
68.00IOMl1z
436-438MHz
438-440MHz
68.333MHz
- 18 -
Qi403
and final
(2SC1426),
The output signal
(UP-07BL).
and fed to the base of Qi2os
acts as a switch for the
protection circuit. A further
8
01204
2s ��
.
_.
,
012os
2:c68�Yp
I
I
I
J
__
r
J
volts by
Advertisement
Table of Contents
