Instruction manual

STC1• 10
CONSTRUCTION OF THE STEREO TRANSMITTER COMPANION
Sort out all of your parts to begin with, making sure you have all of the parts
required. You can use old egg cartons to hold various parts to make them
easier to find. We will begin building the kit from the back end of the board
where all the jacks will eventually be placed. Make sure to mount parts on the
correct side! You will want to use the parts layout diagram to assist you in
finding where the parts go.
This is a fairly tightly packed in board so we will be installing some of the lower
profile parts before we begin on the higher profile components like capacitors
and regulators. Have some patience and take the steps in order and we will
have a working kit in the end.
For each part, our word "Install" always means these steps:
1. Pick the correct part value to start with.
2. Insert it into the correct PC board location.
3. Orient it correctly, follow the PC board drawing and the written
directions for all parts - especially when there's a right way and a wrong
way to solder it in. (Diode bands, electrolytic capacitor polarity, transistor
shapes, dotted or notched ends of IC's, and so forth.)
4. Solder all connections unless directed otherwise. Use enough heat and
solder flow for clean, shiny, completed connections.
❒ 1. Orient the board in the same direction as the parts layout diagram.
❒ 2. Install R63, a 4.7K ohm resistor (yellow-violet-red).
Note that this resistor and many others are installed in a
“stand up” position. Keep the component nice and
vertical for neatness, but the lead lengths as short as
possible for proper operation. Notice the relationship of
the mounting of the part and the way it is shown on the parts layout
diagram.
❒ 3. Install R28, another 4.7K ohm resistor (yellow-violet-red).
❒ 4. Install R35, a 4.7K ohm resistor (yellow-violet-red).
❒ 5. Install R64, a 4.7K ohm resistor (yellow-violet-red).
❒ 6. Install R38, yet another 4.7K ohm resistor (yellow-violet-red).
❒ 7. Install R39, even another 4.7K ohm resistor (yellow-violet-red).
❒ 8. Install R53, a 10K ohm resistor (brown-black-orange).
❒ 9. Install D5, the 4.7 or 5.1 volt zener diode. The easiest way of identifying
this diode is by comparing it to the rest of the diodes in your kit. This is the
only one of its kind, so it will look quite a bit different than the 1N4148 type