Small Wonder Labs
PSK-20 Transceiver Kit 03/09/10
2000
16
Group 5 Assembly:
Group 5 assembly installs the first mixer and preamp.
Install R2 (100
Ω
, brown/blk/brown).
Install C2 and C101 (.01 uF disk caps).
Install R1 (51
Ω
, green/brown/black).
Install R3 (2.2K, red/red/red).
Install C4 (470 pF monolithic cap, '471J')
Install C3 (100 pF monolithic cap, '101J')
Install C5 (.01 uF disk cap).
Install L3, Toko shielded Inductor, 'TKANS
9449'
Install D1 through D4 (1N4148s). Match the
installation polarities as shown on the
silkscreen and on as shown on the figure on
this page.
Install L1 (4.7 uH RF choke,
yellow/violet/gold).
Install L2 (1.2 uH RF choke,
brown/red/gold).
Install C1 (22 pF disk cap).
Install transistor Q1 (J309/J310, from
antistatic bag). Match the orientation of the
flat side of the component to that of the
silkscreen.
Install Mixer U1 (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.
L3
(J5)
PWR.
M
C
L
T
U
F
-1
U1
C1
22
D1
D4
L2
L1
4.7 uH
1.2 uH
C3
C5
.01
100
.01
.01
4
7
0
C
4
R3
Q1
2
.
2K
.01
51
C2
R1
R2
100
C101
