Heathkit SW-717 - Detailed Circuit Component Analysis

3
INTRODUCTION
The Heathkit
Model
SW-717 Shortwave
Receiver is designed
to receive both the
standard broadcast
and the short
wave
bands. The receiver tunes from
550
kHz to 30
MHz in
four
overlapping bands.
The
Receiver
features
electrical
bandspread
for
all four
bands,
a relative
signal strength
meter, a BFO
control,
an
automatic
noise limiter,
and
a
headphone
jack.
There
is also
a built-in rod
antenna for
the
broadcast band
and
provisions
for
connecting
an external
antenna for
shortwave reception.
Solid
-state
circuitry is used throughout.
Most
of the
components are
mounted
on a
printed
circuit board both
for
ease
of assembly
and
for
reliability.
The built-in
power
suppfy is transformer operated
from
either 120
Vac or 24O
Vac and uses
four
silicon
diodes
in a
full-wave
bridge
circuit.
Refer to the "Kit Builderc Guide"
for
complete
information
on unpacking,
Wrts
identification, tools,
wiring, soldering,
and step-by-step
asemb ly
proced
ures.
I.IEATHKITT,