Page 47 - Build Your Own Transistor Radios a Hobbyists Guide to High-Performance and Low-Powered Radio Circuits

Passive Com,ponents
Passive components such as resistors used in the designs are in general 5 percent
V4-W resistors but 1 percent types may be used (Figure 3-11).

FIGURE 3-11 Resistors.
As seen in the figure, generally a 5 percent V4-W resistor on the bottom will do just
fine for most of the designs in this book. More precise 1 percent resistors such as

the types shown at the top and center of the figure can be used for circuits
requiring more precision, such as phase-shifting circuits or timing or oscillator
circuits.
Fixed inductors also will be used in some of the designs, and some of them actually
'look like resistors (Figure 3-12). The calor code is the same as for resistors, in

microhenrys (IJH). For example, yellow, violet, and red equal 4,700 IJH or 4.7 mH ..
To make sure of an inductor's vallue, though, measure with an inductance meter.
Generally, the resistance in ohms of the inductor will not match the inductance in
millihenrys (mH) or microhenrys (IJH). Therefore, if an inductor that looks like a
resistor is measured with an ohm meter, the resistance measurement will not
match the color code and the user can then deduce that the component is most

likely an inductor instead of a resistor.