Vectronics VEC-221K - Manual (Page 12)

VEC-221K Instruction Manual CW Memory Keyer Kit
7
STEP-BY-STEP CONSTRUCTION
Before assembling your kit, please take time to read and understand the VEC kit
warranty printed on the inside cover of this manual. Also, read through the
assembly instructions to make sure the kit does not exceed your skill level. Once
you begin construction, your kit will be 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.
Observe correct polarity when mounting components such as the electrolytic
capacitors, diode, LED, transistor and voltage regulator. If you orient capacitors
so their values face the board edges, you'll be able to read them easily when the
kit is finished. 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 the section titled "Parts
Placement Diagram". 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 about what you need to build your kit, please
refer back to the section titled "Tools and Supplies". If you're ready to begin
now, let's get started!
“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:
Good 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.
Notice the directions use two sets of check boxes. Check one when a step is
complete and use the other for double-checking your work before operation.