Instruction manual

DDF1  14

DDF1 DOPPLER DIRECTION FINDER ASSEMBLY STEPS

IMPORTANT!!

Although we know that you are anxious to complete the assembly of your di-

rection finder kit, it will become necessary to assemble in a specific order to

accomplish the final components installation of your unit. Try to avoid the

urge to “jump ahead” installing components. We’ll be installing components

in blocks of the same type and/or value. Usually the component locations

will start in the upper left of the board and proceed in a left to right, top to

bottom order. Please also note that components will be mounted on BOTH

SIDES OF THE PRINTED CIRCUIT BOARD so be sure to read ALL instruc-

tions and follow them in order.

FRONT PANEL STICKER INSTALLATION

We need to place the front panel sticker on the case first so it will be dry by

the time you have finished the component assembly.

1. Locate the front sticker and top half of the case. This is the largest

one with the most holes in it.

2. Lightly spray the cover surface with some window cleaner like Win-

dex™. Now remove the protective paper backing from the sticker and

apply it on the case. Since you used the window cleaner you can eas-

ily move the sticker around to align it with the holes in the case.

3. Gently smooth out the sticker with a soft cloth to remove any air

bubbles and set it aside to dry.

COMPONENT ASSEMBLY

The following components will be installed on top of the board which is the

side with the most printing on it. Orient the board so “RAMSEY ELECTRON-

ICS” and “DDF-1 REV1.2 KJW” is toward you.

Here we go!!!....First we’ll install the resistors. They may be installed in ei-

ther direction and you should keep them tight to the board.

 Locate seven(7) 10K ohm [brown-black-orange]

1. Install R24, 10K ohm.

2. Install R16, 10K ohm (brown-black-orange). There is a plated

through hole inside the silkscreen for R16 that is not the installation

hole. Be sure to install the resistor lead in the proper hole.

3. Install R13, 10K ohm.

4. Install R22, 10K ohm.

 5. Install R39, 10K ohm.