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ASSEMBLY INSTRUCTIONS
In ALL PC-board assembly steps, our word "INSTALL" means to do this:
Insert the part, oriented or "pointed" correctly, into its holes in the PC
board.
If helpful, gently BEND the part's wire leads or tabs to hold it in place,
with the body of the part snugly against the top side ("component side")
of the circuit board.
Solder ALL wires or pins of the part.
Trim or "nip" all excess wire lengths extending beyond each solder
connection, taking care that wire trimmings do not become lodged in
solder connections.
You can see that this circuit board, the center portion in particular, is fairly
well-filled with components. There's more to this receiver than the average
beginner's radio or even our popular Amateur Band receivers.
Follow the assembly instructions IN SEQUENCE and check off each step as
understood and completed. Some of the components require modification!
Examine the schematic circuit diagram and PC Board parts layout diagram
as you proceed.
Use good soldering techniques! Let your soldering iron tip heat both the
component lead wire and PC board trace enough so that the wire itself AND
the foil trace BOTH become hot enough TOGETHER to melt a bit of solder
so that it flows smoothly from the pin to the PC board trace.
Enough said... Let's get building!
1. Install J1, the RCA antenna jack. Solder all 4 points.
2. Install S1, the DC on-off switch. It fits only one way. Ensure that the
white plastic switch extends out over the edge of the printed circuit
board.
3. Install C1, a .01 µF (marked .01 or 103) signal coupling capacitor,
which brings the antenna signal up to the front of the PC board. Notice
the long PC trace from J1 through C1 to R1.
4. Install potentiometer R1, the RF gain control.
5. Now, it's time for a little "destruction"! (If you jumped ahead and
installed L1 and L2, we've got bad news for you). Before these two
SR-1 – 9
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