Vectronics VEC-821K - Manual (Page 6)

VEC-821 K Instruction Manual Super CW Filter Kit
first separate them into groups by multiplier band (make a pile of 10s, 100s, Ks,
10Ks, etc.). Next, sort each group by specific value (1K, 2.2K, 4.7K, etc.).
This procedure makes the inventory easier, and also makes locating specific
parts more convenient later on during construction. Some builders find it
especially helpful to arrange resistors in ascending order along a strip of double-
sided tape.
Some VEC kits may contain molded chokes which appear, at first glance,
similar to resistors in both shape and band marking. However, a closer look will
enable you to differentiate between the two--chokes are generally larger in
diameter and fatter at the ends than resistors. When doing your inventory,
separate out any chokes and consult the parts list for specific color-code
information.
R e a d i n g C a p a c i t o r s :
Unlike resistors, capacitors no longer use a color code for value identification.
Instead, the value, or a 3-number code, is printed on the body.
As with resistors, it's helpful to sort capacitors by type, and then to arrange them
in ascending order of value. Small-value capacitors are characterized in pF (or
pico-Farads), while larger values are labeled in uF (or micro-Farads). T h e
transition from pF to uF occurs at 1000 pF (or .001 uF)*. Today, most
monolithic and disc-ceramic capacitors are marked with a three-number code. The
first two digits indicate a numerical value, while the last digit indicates a
multiplier (same as resistors).
Electrolytic capacitors are always marked in uF. Electrolytics are polarized
devices and must be oriented correctly during installation. If you become
confused by markings on the case, remember the uncut negative lead is slightly
shorter than the positive lead.
Diodes:
Diodes are also polarized devices that must be installed correctly. Always look
for the banded or cathode end when installing, and follow instructions carefully.