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ELECRAFT K 2 Instrucciones de operaciones Pagina 13

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Low-Pass Filters
W. Burdick
E. Swartz
Elecraft
Rev.
Sht.
Date
By
KPA100
2 of 2
PIC16C72
AUXBUS
78L05
MCLR
OSC1
OSC2
C23
C25
.001
RA4
RC0
RC1
RA0
RA1
RA2
RA3
RA5
VSS
RC2
RC3 RC4
RC5
RC6
RC7
VSS
VDD
RB0
RB1
RB3
RB4
RB5
RB6
RB7
RB2
IN
0.1
10
14 15
20
25
28
U1
U3
OUT
1
5
12CTRL
5V
Q8
2N3904
C46
.01
C44
.01
C43
.015
200V
C42
.015
200V
C41
100
R4
100K
X1
18.432MHz
4
2
3
1
T3
7T bifilar
FT37-61
D6
D5
D8
D7
R10
47
C40
0.1
C39
.01
C38
.01
12CTRL
12CTRL
D4
D3
C37
.01
30V
D2
D1
C36
.015
200V
80V
90-150V
High-Voltage Bias Supply
C35
0.1uF
4 MHz
C26
X2
33
5V
K3
K4
160m
K5
K6
K7
K8
K9
K10
K11
K12
12CTRL
VFWD
VREFL
5R
5T
I SENSE
RP1
3.9K
8
7
8R
C24
.01
C12
.01
C13
.01
C14
.01
C15
.01
C16
.01
C17
.01
C18
.01
C19
.01
C20
.01
C21
.01
T SENSE
123456789
J8
T2OUT
R2OUT
R1OUT
T1OUT
T3OUT
R3OUT
R2IN
T2IN
T1IN
R1IN
R3IN
T3IN
GND
VCCVDD
VSS
16
12
14
15
13
11
10
2
3
9
1
8
5
4
7
6
U4
RFC8
RFC7
RFC6
RFC9
C84
C9
VRFDET
AUXBUS
8R
AUXBUS
VRFDET
C8
C7
C32
15µH
.001
C97
.01
MAX1406
12CTRL
TXD
RXD
12CTRL
12CTRL
5V
-5 TO -25V
RS232 Interface
/K2 TX
/K2 RX
(BACK VIEW)
12345
6789
10
1
2
3
4
5
6
7
8
9
P1
To Ctrl Board
Q9
IRF830 or IRL620
K2
C22
.01
J7
D1-D8 = 1N4148
All relays are shown in the RESET (de-energized) condition.
NOTES:
= on bottom of PC board (nearest the heatsink).
200
R31
C90
.01
Ext. PA Key
Aux I/O
17/20m
80m
/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 (NC)
M
FAN
FAN+
FAN-
J8
RP1
56
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
C5BC5A
K3
K5
K7
K9
K11 K12
K4
K6
K8
K10
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
MCU
C74
.01
C98
.01
C99
.01
30/40m
10/12/15m
TP1
BIAS SET TEST POINT
VRFEN
Q12
2N7000
R8
10K
S
D
G
12PA
12PA SENSE
nc
G
D
S
R1
3.3K
C13-C21
TP3
G
2/5/04
65
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