Transcript スライド 1

Mark-94 Main part block diagram
2ND OSC TX
Mic
6MHz Filter
Mic AMP
TA2011S
TX IF AMP
2SK241
Balanced Modulator
NJM2594
TX IF OUT
RX IF IN
Side Tone
CW Side Tone
74HC02
SP
AF Power
LM386
AF AMP
2SC1815
Balanced Modulator
NJM2594
RF IF AMP
3SK114
RF IF AMP
3SK114
AM Out
AGC AMP
LM324
AGC DET
1N60 X2
AGC AMP
2SC1815
AGC
RF IF AMP
3SK114
Mark-94 RF block diagram
From
RX ANT
RF AMP
MGF4910C
RF AMP
3SK183
MIXER
2SK241 X2
IF AMP
2SK241
SSB/CW
AM
To Main
RX IF In
AM Mode
2nd
MIXER/OSC
IF AMP
455KHz
AM DET
To Main
AM Out
LA1600
5545KHz
From VFO
44.000-44.700MHz
TX IF IN
MIXER
2SK241 X2
Buffer
3SK114
Pre-Driver
2SC2053
2nd OSC
Carrier Level
control
2SC1818/2SA1015
From MPU
Driver
2SC2078
Final
2SC1945
TX ANT
Mark-94 VFO part
LPF
From
MPU
PLL
TC9256AP
VCO
2SC1907E
Active LPF
2SK30/2SC1815
Buffer
2SC1907E
1SV101 X2
BPF
VFO Out
LPF
DDS
AD9834
Buffer
2SK241
Mark-94 2nd OSC part
LPF
From
MPU
DDS
AD9834
Buffer
2SK241
Buffer
2SK241
Keying
2SC1815
RX 2nd OSC
TX 2nd OSC
Mark-94 MPU part
KeyBoard
LCD display
Crystal
Module 16MHz
50.200
Encoder
Pulse
CONT CPU
16F877A
SDO
SDI
SDI
SDO
SCK
SCK
DISP CPU
16F877A
VFO
PLL/DDS
CW Key
(Dot&Line)
PTT
Key Speed
SideTone
/Mute/BZ
Mode
Control
2ND
OSC