Vectronics VEC-821K - Manual (Page 5)

'EC-821 K Instruction Manual Super CW Filter Kit
Desoldering Tips:
If you make a mistake and need to remove a part, follow these instructions
carefully! First, grasp the component with a pair of hemostats or needle-nose pliers.
Heat the pad beneath the lead you intend to extract, and pull gently. The lead should
come out. Repeat for the other lead. Solder may fill in behind the lead as you extract
it--especially if you are working on a doublesided board with plate-through holes.
Should this happen, try heating the pad again and inserting a common pin into the
hole. Solder won't stick to the pin's chromium plating. When the pad cools, remove
the pin and insert the correct component. For ICs or multi-pin parts, use desoldering
braid to remove excess solder before attempting to extract the part. Alternatively, a
low-cost vacuum-bulb or spring-loaded solder sucker may be used. Parts damaged
or severely overheated during extraction should be replaced rather than reinstalled.
Work Habits:
Kit construction requires the ability to follow detailed instructions and, in many
cases, to perform new and unfamiliar tasks. To avoid making needless mistakes,
work for short periods when you're fresh and alert. Recreational construction
projects are more informative and more fun when you take your time. Enjoy!
Sorting and Reading Resistors:
The electrical value of resistors is indicated by a color code (shown below). You
don't have to memorize this code to work with resistors, but you do need to
understand how it works:
Resistor Color Code
Black = 0 (tens) Blue = 6
1st Digit Brown = 1 (hundreds) Violet = 7
2nd Digit Red = 2 (K) Gray = 8
When you look at a resistor, check its multiplier code first. Any resistor with a black
multiplier band falls between 10 and 99 ohms in value. Brown designates a value
between 100 and 999 ohms. Red indicates a value from 1000 to 9999 ohms, which is
also expressed as 1.0K to 9.9K. An orange multiplier band designates 10K to 99K,
etc. To sort and inventory resistors,