Heathkit SB-1000 - Page 10

Heathkit
6. Each circuit part in an electronic kit has its own
component number (R2, C2, etc.). Use these
numbers when you want to identify the same
part in the various sections of the Manual.
These numbers, which are especially useful if a
part has to be replaced, appear:
—In the Parts List,
—At the beginning of each step where a compo-
nent is installed,
—Insome illustrations,
—In the Schematic,
—In the section at the rear of the Manual.
7. When you are instructed to cut something to a
particular length, use the scales (rulers)
provided at the bottom of the Manual pages.
SAFETY WARNING: Avoid eye injury when
you cut off excessive lead lengths. Hold the
leads so they cannot fly toward your eyes.
Page 9
SOLDERING
Soldering is one of the most important operations you
will perform while assembling your kit. A good
solder connection will form an electrical connection
between two parts, such as a component lead and a
circuit board foil. A bad solder connection could
prevent an otherwise well-assembled kit from
operating properly.
It is easy to make a good solder connection if you
follow a few simple rules:
1. Use the proper type of soldering iron. A 22- to
25-watt pencil soldering iron with a 1/8" or
3/16" chisel or pryamid top works best.
2. Keep the soldering iron tip clean. Wipe it often
on a wet sponge or cloth; then apply solder to
the tip to give the entire tip a wet look. This
process is called “tinning," and it will protect
the tip and enable you to make good
connections. When the solder tends to "ball" or
does not stick to the tip, the tip needs to be
cleaned and retinned.
NOTE: Always use rosin core, radio-type solder
(60:40 tin-lead content) for all of the soldering in
this kit. This is the type we have supplied with the
parts. The Warranty will be void and we will not
service any kit in which acid core solder or paste flux
has been used.