Vectronics VEC-1220K - Manual (Page 13)

VEC-1220K/1230K/1240K/1280K Owner's Manual
11
STEP-BY-STEP ASSEMBLY
Your VEC QRP-CW Transmitter Kit will be constructed in three stages. First,
you'll install the smaller generic parts (resistors, capacitors, etc.) that are
common to all four models. Next, you'll mount frequency-determining
components--those parts that determine the specific band of operation for your
particular kit. Finally, you'll complete the project by installing larger generic
parts such as jacks and switches--things that might get in the way if installed
first.
In these instructions, when you see the term install, 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. Use
sharp side-cutters to clip off excess lead length before soldering. Make sure
trimmed leads don't touch other pads and tracks, or a short circuit may result:
Good Not Good
The term solder means to solder the part's leads in place, and to inspect both (or
all) solder connections for flaws or solder bridges. Nip off excess protruding
leads with a sharp pair of side cutters.
This kit contains 11 fixed-value 1/4-watt resistors. Begin construction by
mounting these first, starting with the smallest value and moving to the largest.
Before installing each one, carefully bend both leads to form right-angles, as
shown below:
.4"
When installing resistors, save some of the clipped-off resistor lead ends--you'll
need these for pc-board jumpers later on.
Phase 1: Resistors
Find two (2) 100 ohm resistors (brown-black-brown).
! ! 1. Install a 100 ohm resistor at R4 and solder.
! ! 2. Install a 100 ohm resistor at R7 and solder.
! ! 3. Find a 270 ohm resistor (red-violet-brown). Install this at R8 and
solder.