Ramsey Electronics FM25A Instruction Manual download pdf (Page 16)

FM25A • 16

 16f. Install R31, a 1K ohm resistor (brown-black-red). Notice this resistor is a

laydown component.

 17f. Install C8, .01 µF disc capacitor (marked 103 or .01 or 10 nF).

 18f. Install R1, 10K ohms (brown-black-orange).

 19f. Install Q1, the transistor marked 2N3904. The flat side must be placed as

shown on the PC board, facing C6. Mount it as close to the board as possible

without forcing it.

 20f. Install C6, 10 µF electrolytic capacitor. Check polarity!

 21f. Install R2, 470 ohms (yellow-violet-brown).

 22f. Install R4, 10K ohms (brown-black-orange).

 23f. Install D1, the LED. The flat side goes toward switch S1. Leave it stand-

ing about 1/2 an inch off of the board when soldering. After soldering bend it

over to a 90º angle at it’s mid point so that it faces the outside of the board.

D1 indicates that the frequency is locked.

ASSEMBLY INSTRUCTIONS FOR CUSTOM CASE

The enclosure is a key element to the overall pride you will have upon completing

your Ramsey kit. The enclosure will show how you were able to “build from

scratch” a commercial piece of high-tech electronics. For some of us, the enclo-

sure will also hide a number of “not-so-pretty” assembly mistakes. Once the kit is

enclosed, your friends will never know that you were new to soldering. Finally, the

enclosure will protect your electronics from many possible causes of damage so

that you can receive years worth of enjoyment using, talking about, and remem-

bering the fun you had building your kit. In short, TAKE YOUR TIME

when as-

sembling the enclosure. This is the part that you and your friends will look at and

admire for years!

 1. Lay the front and rear plastic plates over their corresponding labels.

 2. Outline the holes that you need to cut using a pen or pencil.

 3. Use your hobby knife or paper punch to cut the labels to their outlines.

 4. Peel off the sticker backing on each sticker and place the labels over the

plastic plates. Make sure that they are aligned correctly before allowing them

to touch the plastic plates. Believe me, when they stick the first time, they

really stick!

 5. Insert the board into the case with the knobs and LED extending through

the holes in the front panel.

 6. Raise the rear portion of the PC board and extend the jacks through the

rear plastic plate. Insert the plate into the grooves on the base tray.

 7. Secure the PC board to the bottom base tray with 4 short Phillips head

screws.

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Ramsey Electronics FM25A Instruction Manual Page 16