AM Short Wave Radio Kit  (280-0176)   Features         Faxback Doc. # 6847

The AM-SW Radio Kit uses one Printed Circuit Board, three transistors,
8 resistors and 8 capacitors including a variable capacitor.

It has high sensitivity and covers a wide range of frequencies: the AM
covers from 520KHz to 1625KHz, the SW1 (Short Wave 1) from 6MHz to 8MHz,
and the SW2 from 12MHz to 17MHz.

In these SW bands, you can enjoy listening to the Voice of America, BBC,
Radio Moscow, Radio Nederland and many other international stations.

This manual contains easy-to-follow, step-by-step instructions and
plenty of drawings to make them clear.

After you've tuned in an AM or SW signal, it is then amplified by the 2
transistor amplifier circuit.

The broadcast current coming from the antenna is tuned by the coil and
variable capacitor circuit which selects the station.

The broadcast signal consists of high-frequency (radio frequency) waves
modulated with low-frequency (audio frequency) waves.

The process of detection is used to select or separate the low-frequency
current out of the broadcast current, as this current is the carrier of
the signals for sounds.  The weak current that flows in the antenna is
intensified many times through step by step amplification.

The SW circuit is on the small Printed Circuit Board.  It gets its signal
from terminals 11 and 12.  The AM circuit is in the lower center of the
front Panel.  Its signal comes from terminals 18 and 20.

The circuit that is to the right of terminals 21, 22, 23, 24 and 25 is
the 2-transistor amplifier which amplifies the audio frequency part of the
AM and SW signal.

REQUIRED TOOLS

You will only need a few simple tools to build your kit.

  Small Phillips screwdriver

  A pair of long-nose pliers

  Wire cutters

You will also need one 9V battery.  We recommend Radio Shack's 23-464 or
23-583.


(LB/all-08/18/94)