ELECRAFT KX1 - Page 86

LOW-
PASS
FILTER
POWER
AMP
(Q6)
Appendix C KX1 BLOCK DIAGRAM
W. Burdick/E. Swartz Rev. A 10-04-00
RCV
MIXER
U6)
BUFFER
(Q1)
DRIVER
(Q4, Q5)
AGC
(Q9)
Common Transmit Receive
KEY
DDS VFO
(U2)
DISPLAY
AND
CONTROLS
CRYSTAL
FILTER
A.F.
AMP
(U4)
LOW-PASS
FILTER
BFO
4.913 MHz
WithVFO = 7000.00 kHz and
RX Mode = Normal (CW):
Fdds, RX = 11913.6 kHz
Fdds, TX = 7000.00 kHz
4.9136 MHz
BAND-
PASS
FILTER
MCU
(U1)
PROD.
DETECTOR
(U5)
T-R
(Q7)