Vectronics VEC-1290K - Manual (Page 9)

VEC-1290K Instruction Manual AM Radio Transmitter Kit
STEP-BY-STEP ASSEMBLY INSTRUCTIONS
Before assembling your kit, please take time to read and understand the VEC
kit warranty printed on the inside cover of this manual. Read through the
assembly instructions to make sure the kit does not exceed your skill level.
Once construction is started, the kit is non-returnable. Finally, if you haven't
already done so, please verify that all parts listed in the inventory are included.
If anything is missing or broken, refer to the warranty instructions for
replacing missing or damaged parts.
First, a few notes and comments to help you along. Part designators for
components such as R1, C3, etc., appear on the silk-screened legend on the
component-mounting side of the printed circuit board. These correspond to
the drawing shown in
PARTS PLACEMENT section of this manual. The parts
are inserted on the silk-screen side of the board. All capacitors should be
installed with their bodies as close to the PC board as possible; this is very
important in RF circuits.
If you have last-minute questions concerning what tools or materials are
needed to assembly this kit, please refer back to the section entitled
BEFORE
YOU BEGIN.
"Install" When you are directed to install a part, this means to locate, identify,
and insert the part into its mounting holes on the PC board. This includes pre-
bending or straightening leads as needed so force is not required to seat the
part. Once a component is mounted, bend each lead over to hold it in place.
Make sure trimmed leads don't touch other pads and tracks, or a short circuit
may result:
Not Good
"Solder" When you are directed to solder, this means to solder the part's leads
in place, and to inspect both (or all) solder connections for flaws or solder
bridges. If no soldering problems are noted, nip off the excess protruding
leads with a sharp pair of side cutters.
Phase 1: Resistors
Begin assembly by installing the '/,-watt fixed resistors. Because these are all
5-percent tolerance ending with a fourth gold color band, you need only read
the first three bands of the color code during the following steps. All resistor