
Page 30
Construction Manual for the K2DI v.III and K2DI-PCI boards © EA3BLQ - Revision June 2005
K2DI v. III
K2 Digital Interface featuring a Mic. Configuration Header Extender and Rear Panel Data Connector
(It Includes a buffered, fixed audio output and the cutting of Front Panel mic. connector's AF and PTT lines, when transmitting data).
© Paulí Núñez, EA3BLQ - November 2003
2
3
6
J1 to FP Board
Mic. Config. Header
J2 Extended
Mic. Config. Header
C4
10 µF
J4 to RF Board, J5
C10
0.022
C7
0.1
J
3
t
o
M
i
n
i
D
I
N
c
o
n
n
.
o
r
t
o
P
1
a
t
t
h
e
K
2
D
I
-
P
C
I
1
2
3
4
5
6
7
8
AF
PTT
DN
UP
FUNC
+5V
GND
GND
+5VDC (10mA max.)
4
9
3
5
CD4053BE
15
10
1
2
C2
10 µF
C3
10 µF
R2
100K
R3
10K
16
R
6
2
K
t
r
i
m
m
e
r
p
o
t
.
C9
0.1
1
2
3
1
3
4
CD4053BE
678
CD4053BE
1
3
N
C
12
11
MiniDIN connector
(connections as seen from
K2's rear panel)
1 - AF IN
2 - GND
3 - PTT
4 - AF OUT
5 - NC
6 - NC
AF
PTT
D
S
G
G
D
S
Q2
J310
Q1
J310
R5
3.3M
J310
D
S
G
4
7
NC
1
8
C
1
1
1
0
µ
F
C6
0.047
5
C5
220 µF
R4
2.7
Ω
LM386N
N
o
t
e
s
:
A
l
l
r
e
s
i
s
t
o
r
s
a
r
e
1
/
4
w
a
t
t
a
n
d
t
h
e
i
r
v
a
l
u
e
i
s
i
n
o
h
m
s
;
K
=
1
,
0
0
0
a
n
d
M
=
1
,
0
0
0
,
0
0
0
D
e
c
i
m
a
l
v
a
l
u
e
s
o
f
c
a
p
a
c
i
t
a
n
c
e
a
r
e
i
n
m
i
c
r
o
f
a
r
a
d
s
(
µ
F
)
N
C
=
N
o
c
o
n
n
e
c
t
i
o
n
S
e
e
t
e
x
t
f
o
r
c
o
m
m
e
n
t
s
o
n
R
7
*
C1
10 µF
R1
100K
C8
0.01
14
U1 (c)
U1 (b)
U1 (a)
U2
R7*
220
Ω
C
C
W
C
W
2
J5 to P2 at
K2DI-PCI
+
+
+
+
+
+
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