Elecraft K1 - Manual (Page 79)

Transmit Mixer/Osc.
RF Output Detector
K e y / K e y e r / P a d d l e
K1 RF Board
(ATTN Relay)
W. Burdick
Appendix B
T-R Switch
4.915 MHz
To FIL-P2
E.Swartz
ZVN4424A
RCV RF
2SC2166 or 2SC5739
2SC1969
Driver
1N4007
1N4007
1N4007
1N4007
12V DC
2 of 2
1N5711
Buffer
1N4007
PREMIX
1N4007
LT1252
1N4007
100µH
100µH
SB530
Power
RF/SMTR
SA612
3.3 Ω
RFC5
22µH
47µH
RFC3
RFC4
1.8K
1.8K
100K
2.7K
Ant.
1.5K
.01 226 Ω 100K
J 3 0 9
.047
POWER
10µF
2.7K
6T
.001 .001
.001
RFC2
6A
C50
R31
12V
R30
.047
C55
0.1
R29
2 7 0
C45
C44
C47
C46
C49
C48
.01
R26
.01
.01
.01
0.1
.01
R27
D10
D12 D11
R25 D13
R24
D16
OFF
C43
R36
R37 R34
D15
C58
3.9K
.01
1 2 0
R35
D18
C60
.01
C16
C57
C62
3 3 0
C15
C14
4 7 0
C59
.001
D14
8 2 0
C29 C28
C56
.047
8 2 0
R22
8 2
.001
22 µH
Q7
Q6
3 3
T3
D9
Q4
J 5
J 4
ON
S 1
PA
U8
RP5 Q5
V -
V+
U9
R12
R11
C13
5 0
R10
R9
R28
J 3
3 3
X6
D5
J 7
1 0
K1
3
4
1
2
L 2
D
S
G
1
2
3
4
5
7 6
8 G
D
S 1
2
3
2
6 +
-
7
4
+
1 2 3 4 5 6 7 8
1
1 %
1 %
6R/AUX
2
4
1
3
T4
C52 0.1
D19
36V
R33
4 7 0
3.9K
RP4
5
6
3.9K
RP4
3
4
Q14
3.9K
RP4
1 2
2N4124
RP5
4 3
RP5
6 5
R19 R20
20K 39K
KEYIN
6A
3.9K 3.9K
/DOT /DASH
.001
C51
12V
R32
3 3
TR1
BUF
MIX
OSC
ATTN
BPF
TR2 DRV
PA
ANT
RFD
PRE
TR3
Transmit signal-tracing points (see text)
1 2 3 4 5 6 7 8
J 8
To FIL-P3
1N4753
Transmit Attenuator
2 7 0
R38
+ -
1 0
C3
100µH
RFC7
6R_2
6R_2
6R_2
C75
.01
C1 1 5 0
Aux 12 V
Elecraft
Rev. Sht. Date By
1.8K
R39
6R_2
G
OPER OFS TEST
S 2
6T 6A
P 3
32
1
*
If not, jumper P3 pins 1-2.
If the KAT1 ATU is installed, jumper P3 pins 2-3.
RF Det *
Source
C78
+
220µF
C53
+
C76
.01
5.6K
R4
12V_2
RFC8
12V
**
80-m band kit. If 80 m is not used,
install a jumper at RFC8.
**
1 / 5 / 0 2
RFC8 is supplied with the
C78 is supplied with
the 80-m band kit