Vectronics VEC-1002K - Manual (Page 18)

VEC-1002K Owner's Manual 2 Meter FM Receiver Kit
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amount of solder. Eventually, the enamel insulation should begin
breaking down, allowing solder to coat and adhere to the wire (it may
be easier to perform this operation with the coil threaded onto the
screw). If your soldering iron doesn't generate enough heat to start the
enamel stripping process, scrape the enamel away with an Exacto

knife before tinning. Make sure both leads are clean and brightly
tinned all the way around before installing.
! ! 7. When the first 4-turn coil is prepared as shown, install at L1 and
solder. Check coil shape and spacing before moving on.
! ! 8. Repeat the previous operation, installing and soldering a second 4-turn
coil at L2.
! ! 9. Using the remaining wire, wind a 10-turn coil for L3. Unlike L1 and
L2, the turns of L3 should be compressed closely so the overall coil is
about .3" in length--about the distance between its mounting holes.
Install and solder.
Phase 10: Completing Construction
! ! 1. Install the 9-volt battery snap. The red lead is installed at +9V, and
the black at GND. Solder in place.
! ! 2. Stress relief is provided to prevent battery leads from flexing and
eventually breaking at their connection point. Find a hole part-way
back on the left edge of the PC board Use the plastic tie-wrap
provided in your kit to secure the battery leads in place, as shown in
the following diagram. Insert the tie-wrap through the hole, close it
over the wires, and pull tight. Nip off the excess end.
Tie-wrap
black
+
red
SW1
Push-rod
Now, all that remains is to install U1 and U2 in their sockets. Before doing this,
inspect both devices carefully and straighten any bent or crooked pins. Use