Small Wonder Labs
PSK-20 Transceiver Kit 03/09/10
2000
17
Group 6 Assembly:
Group 6 assembly installs the audio switch and
transmit first mixer.
Install C113 (.01 uF disk cap)
Install C22 (1 uF electrolytic cap). Observe
the installation polarity as shown on the
silkscreen.
Install R33 (10K, brown/blk/orange).
Install R34 (470
Ω
, yellow/violet/brown).
Install R35 (220
Ω
, red/red//brown).
Install R36 (22K, red/red/orange).
Install R37 (2.2K, red/red/red).
Install R38 (100
Ω
, brown/blk/brown).
Install R39 and R41 (51
Ω
, green/brn/black).
Install C23 (10 uF electrolytic cap). Observe
the installation polarity as shown on the
silkscreen.
Component outlines "R40" and "TEST" are unused-do
not populate these locations.
Install C24 (47 uF electrolytic cap). Observe
the installation polarity as shown on the
silkscreen.
Install Q4 (2N7000- from antistatic bag).
Match the orientation of the flat side of the
component to that of the silkscreen.
This part
is static-sensitive
.
Install Q5 and Q6 (2N4401- from antistatic
bag). Match the orientation of the flat side of
the components to that of the silkscreen
Install Mixer U6 (MCL TUF-1 or TFM-2),
from antistatic bag).
Be sure that the part
labeling is oriented as shown on the figure
on this page and that the part correctly
overlaps the silkscreened outline on the
board.
M
C
L
T
U
F
-1
-
+
C22
1 uF
.01
C113
Q4
Q5
Q6
U6
R37
R38
2.2K
100
R
3
9
51
22K
- +
C24
47 uF
R
3
6
- +
C23
10 uF
R33
R34
R35
10K
220
470
R40
TEST
R41
51
2N7000
2N4401
(2 pl)
