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SEMICONDUCTORS
7
NPN transistors [marked 2N3904] (Q1,2,4,5,6,8,10)
1
TO-220 style NPN power transistor [marked TIP31] (Q9)
1
TO-220 style power FET [marked P16NF06] (Q3)
1
1N4148 style glass bead diode (D1)
1
MVAM-108 varactor diode [looks like transistor with 2 leads] (D2)
1
Red LED (D3)
1
LM-358 8 pin dual opamp IC (U1)
1
MC-145106 PLL synthesizer IC (U2)
MISCELLANEOUS PARTS AND HARDWARE
1
10.24 MHz crystal (X1)
2
RCA type PC mount connectors (J1,2)
1
2.1mm power jack (J3)
1
DPDT pushbutton switch (S2)
1
8 position DIP switch (S1)
1
3 pin header strip (H1)
1
jumper block
1
AM25 printed circuit board
1
"diddle stick" plastic alignment tool
2
TO-220 Heatsinks
80' enameled magnet wire
2
4-40 x 1/4 screw
2
4-40 kepnut
ASSEMBLY INSTRUCTIONS
There are numerous solder connections on the AM25 printed circuit board.
Therefore, PLEASE take us seriously when we say that good soldering is
essential to the proper operation of your transmitter!
•
Use a 25-50 watt soldering pencil with a clean, sharp tip.
•
Use only rosin-core solder intended for electronics use.
•
Use bright lighting, a magnifying lamp or bench-style magnifier may
be helpful.
•
Do your work in stages, taking breaks to check your work. Carefully
brush away wire cuttings so they don't lodge between solder
connections.
We have a two-fold "strategy" for the order of the following kit assembly
steps. First, we install parts in physical relationship to each other, so there's
minimal chance of inserting wires into wrong holes. Second, whenever
•
AM25
10
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