23
15 APPENDIX 1: SCHEMATIC DIAGRAMS
15.1 DX-3 Block Diagram
POWER SUPPLY
MODULE
(See Schematic)
DISPLAY
MODULE
& METERS
(See Schematic)
RF / TUBE
MODULE
(See Schematic)
CONTROL
BOARD
MODULE
(See Schematic)
RF
SENSOR
+5V
FAULT
ON AIR
O’DRIVE
Vp
Ip
Ip
Protec
READY
SW
Ig2
Pf
Pr
SWR
Protect
RF OUT
(ANTENNA)
ANTENNA
RELAY
(QSK)
(See
schematic)
Relay 1,2
RF IN
(TRANSCEIVER)
TEMPERATURE
SENSORS
FAN
TEMP
CUT-OFF
H.V.
DC
Eg2
-Eg1
EBS
TRANSFORMER
AC
FILAMENT
H.V.
AC
AC
SCREEN
AC GRID
AC
LOGIC
STBY/
OPR
SOFT
START
(See schematic)
FAN
ON/OFF
FUSE
AC MAINS
AC QSK
