Elecraft KPA100 Manual - Manual (Page 72)

72
1
2
3
4
5
6
7
8
9
T2
O
UT
R2
O
UT
R1
O
UT
T1
O
UT
T3
O
UT
R3
O
UT
R2
IN
T2
IN
T1
IN
R1
IN
R3
IN
T3
IN GN
D VC
C
VD
D VSS
16 12 14 15 13 11 10
2 3
9
1 8 5 4 7 6 U4
RFC8
RFC7
RFC6
RFC9
C84
C9
VR FDE T
AUXBUS
8R
AU
XB
US
VR
FD
E
T
C8 C7
C32
15μH
.001
C97
.01
MAX1406
12CTRL
TXD
RXD
12CTR
L
12CTRL
5V
-5 TO -25V
/K
2
TX
/K
2
RX
(BACK VIEW)
1 2 3 4 5
6 7 8 9
10
1
2
3
4
5
6
7
8
9
Q9
IRF830 or IRL620
K2
C22
.01
D1-D8 = 1N4148
All relays are shown in the RESET (de-energized) condition.
= on bottom of PC board (nearest the heatsink).
200
R31
C90
.01
/OUT0
/OUT1
/OUT2
/OUT3
/OUT4
/OUT5
/OUT7
/OUT6
COM
IN5
GND
IN7
IN6
IN4
IN2
IN0
IN1
IN3
14
13
12
11
10
18
17
16
15
3
5
9
8
7
6
1
2
4
U2
TD62083
or ULN2803
12CTRL
5B
nc
8T
(N
C
)
M
FAN
FAN+ FAN-
J8
RP1
5 6
3.9K
1/2W
L13 L14
C6A
C6D C6F C6B
C6C
C6G
L4 L5 L6
C3E C3H
C3G C3C
C3J C3B C3A
L7 L8
C4D
C4E C4C
C4B C4A
L10 L11 L12
C5D C5F
C5E C5C
C5G C5B C5A
K 3
K5
K7
K9
K11 K12
K 4
K6
K 8
K 10
LPF OUT LPF IN
SCALE
30pF
C27
K1
C29
.01
C28
.01
L1 L2
C2D C2E
C2C
C2B C2A
S.M.
S.M.
S.M.
C3D C3F
S.M.
C6E
RFC6-8: 100 μH
C7-C9, C32: .01 μF
C74
.01
C98
.01 C99
.01
TP1
B IAS S ET T EST P OINT
VRFEN
Q12
2N7000
R8
10K
S
D
G
12PA
12PA SENSE
nc
G
D
S
R1
3.3K
C13-C21
TP3
H 9/25/06
RS232 Interface
Low-Pass Filters