Small Wonder Labs
PSK-20 Transceiver Kit 03/09/10
2000
15
Group 4 Assembly:
Group 4 assembly installs the receiver IF amp, crystal
filter and mixer post-amp.
Install R24 (2.2K, red/red/red).
Install C105 and C109 (.01 uF disk caps).
Note: there is no silkscreened reference
designator for C109.
Install R13 (100
Ω
, brown/blk/brown).
Install R4 (150
Ω
, brown/green/brown).
Install an 8-pin IC socket at U2. Match the
'notch' orientation as shown on the silkscreen.
Install C104 (.01 uF disk cap).
Install C6 (.01 uF disk cap).
Install R12 (2.2K, red/red/red).
Install surface-mount inductor L5 (10 uH,
from envelope). See the discussion of the
previous page for installation cautions..
Install C8 through C12 (22 pF ceramic disk
caps).
Install C7 (33 pF ceramic disk cap).
Install four of the 9 MHz crystals at Y1-Y4.
Install R10 (150
Ω
, brown/green/brown).
Install R9 and R11 (680
Ω
, blue/gry/brown).
Install C102 and C103 (.01 uF disk cap).
Install L4 (10 uH RF choke, (brn/
black/black)
Install R5 (1K, brn/black/red).
.
Install R6 (470
Ω
, yellow/violet/brown).
Install R7 (10
Ω
, brn/black/black).
Install R8 (100
Ω
, brn/black/brown)
Install
Q2
(2N2222,
small
metal-can
transistor). Align the tab on the device rim to
match that of the silkscreen.
T1
R24
U2
2.2K
.01
.01
C105
R13
100
C103
.01
C109
Y1
Y2
Y3
Y4
R12
C104
C9
C10
C11
C12
22
22
22
22
2.2K
.01
22
33
C7
C8
R11
R10
R9
680
680
150
(J4)
L
5
10 uH
.01
C
1
0
2
R4
150
.01
C110
Q2
C6
.01
R6
R8
10
100
470
R7
R5
1K
10 uH
L4
