ozQRP CDV, Руководство по монтажу

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CDV Construction Manual – Issue 3 Page 29
Step 3: Inductors
Locate and install the three SMD inductors. L1 and L3 have the same value, while L2 has a
different value. Use the table below to identify the correct values.
Filter Inductor Inductor label Inductor Value
10MHz L1, L3 1R0 1uH
L2 1R8 1.8uH
20MHz L1, L3 R47 0.47uH
L2 R82 0.82uH
30MHz L1, L3 R33 0.33uH
L2 R56 0.56uH
40MHz L1, L3 R27 0.27uH
L2 R47 0.47uH
Step 4: Connectors
The IN connector is a 2 pin right angled male header. The end with shorter pins is soldered into
the PCB. The longer pins are soldered directly into the CDV PCB.
The OUT connector is a right angle JST 2 pin shrouded male header. It is inserted into the
component side.
12.4 A
TTACHING TO THE
CDV
There are two methods for attaching the board to the CDV.
12.4.1 D
IRECT
In this method the board becomes a part of the CDV assembly. Insert the 2 pins of the right
angled header into the output holes on the CDV PCB. Hold in place and solder into position.
A directly mounted attenuator filter board is shown in Figure 11.
12.4.2 W
IRED
Here the board is located remotely from the CDV PCB and connected via wires. The supplied
connectors and cable may be used or omitted and discrete wiring used instead.
If the board is to be mounted externally and wired inline, then the connectors can
be omitted if desired.