Ramsey Electronics SR2 Manual de instrucciones descargar pdf (Pagina 9)

SC-1 • 9

RAMSEY SC1 KIT ASSEMBLY

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.

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!

❒ 1. Install J3, the DC power jack.

❒ 2. Install J1, the antenna or "RF input" jack.

❒ 3. Install S1, the first of two DPDT push-style switches. These switches

fit the PC board only one way. Solder all six pins.

❒ 4. Install C1, .001 uF (marked .001, 102, or 1 nF), the antenna coupling

capacitor.

❒ 5. Install L3, the first of the 3.9 uH inductors, which have a green body

and are marked orange-gold-white.

❒ 6. Install C2, 470 pF (marked 470 or 471).

❒ 7. Install L4, another 3.9 uH inductor.

❒ 8. Install C3, 470 pF.

❒ 9. Install L5, the last of the 3.9 uH inductors.

❒ 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

❒ 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.

❒ 12. Install R1, 100K ohms [brown-black-yellow].

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Ramsey Electronics SR2 Manual de instrucciones Pagina 9