SC-1
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9
RAMSEY SC1 KIT ASSEMBLY
In all PC board assembly steps, our word "INSTALL" means to do this:
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Insert the part, oriented or "pointed" correctly, into its holes in
the PC board.
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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.
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Solder ALL wires or pins of the part.
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Trim or "nip" all excess wire lengths extending beyond each
solder connection, taking care that wire trimmings do not
become lodged in solder connections.
In keeping with the Ramsey Learn-As-You-Build philosophy, the following
steps will comment on the why as well as the how-to. We know you want to
get it working quickly, but try to peek at the schematic circuit diagram from
time to time. Enough talk, let's get building!
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1. Install J3, the DC power jack.
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2. Install J1, the antenna or "RF input" jack.
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3. Install S1, the first of two DPDT push-style switches. These switches
fit the PC board only one way. Solder all six pins.
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4. Install C1, .001 uF (marked .001, 102, or 1 nF), the antenna coupling
capacitor.
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5. Install L3, the first of the 3.9 uH inductors, which have a green body
and are marked orange-gold-white.
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6. Install C2, 470 pF (marked 470 or 471).
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7. Install L4, another 3.9 uH inductor.
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8. Install C3, 470 pF.
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9. Install L5, the last of the 3.9 uH inductors.
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10. Install C4, .001 uF (marked .001, 102, or 1 nF). Look at the SC1
schematic diagram. You have already wired the entire high-pass filter
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11. Install transistor Q2, 2N3904. Press Q2's wire leads gently but firmly
into the three holes, making sure that the flat side is oriented correctly.
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12. Install R1, 100K ohms [brown-black-yellow].
