FM100B • 33
13F. Install R6, a 12K ohm stand-up resistor (brown-red-orange).
14F. Install R21, a 22K ohm stand-up resistor (red-red-orange).
15F. Install C7, a 10 pF ceramic capacitor (marked 10).
16F. Install C36, a 0.001 uF ceramic capacitor (marked 102).
17F. Install X2, the 7.6 MHz crystal. This is the crystal which generates the
reference frequency for our transmissions.
18F. Install C15, a 10 uF electrolytic capacitor. Again check orientation!
19F. Install C39, a 10 uF electrolytic capacitor.
20F. Install Q3, a 2N3904 NPN transistor. Pay close attention to where the
flat side is pointing upon installation.
21F. Install Q4, another 2N3904 NPN transistor. If you look closely at the
schematic for this section you will see these two transistors form what is
called a Darlington Pair. This gives us the current gain we need for the
phase locked loop to work properly. Note the flat side in the opposite direc-
tion from Q3.
22F.Install R37, a 47K ohm resistor (yellow-violet-orange).
23F. Install R40, a 47K ohm resistor (yellow-violet-orange).
24F. Install C42, a 0.1 uF ceramic capacitor (marked 104).
25F. Install R26, a 100 ohm stand-up resistor (brown-black-brown).
26F. Install R22, a 4.7K ohm resistor (yellow-violet-red).
27F. Install R7, a 10K ohm resistor (brown-black-orange).
28F. Install C23, a 0.047 uF ceramic capacitor (marked 473 or .047).
29F. Install R27, a 10K ohm stand-up resistor (brown-black-orange).
30F. Install R18, a 100K ohm stand-up resistor (brown-black-yellow).
31F. Install C28, a 47 uF electrolytic capacitor. Again note orientation.
32F. Install C18, a 10 uF electrolytic capacitor. Orientation.
33F. Install C8, a 0.001 uF ceramic capacitor (marked 102).
34F. Install D1, one of the MV2105 varactor diodes. These look a lot like
transistors because they are in TO-92 type cases, but they only have two
leads. This makes it easy to orient them properly to the flat side as shown
in the board layout. D1 is the primary tuning diode.
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