Introduction - Heathkit HW-9 User Manual

Heathkit
INTRODUCTION
The
Heathkit
Model
HW-9
Deluxe
QRP
CW
Trans-
ceiver
is
a
compact
80-through 10-meter
HF
trans-
ceiver
designed with the avid
low-power
CW
operator in
mind.
It
covers the
lower 250
kHz
of
the 80, 40, 20,
and
15-meter
amateur bands.
When
you
install
the
Model
HWA-9
Accessory
Band
Pack,
the
Transceiver
also covers the 30, 17,
and
12-meter
WARC
bands and
the
lower 250
kHz
of the
10-meter
band.
Broadband
circuits
eliminate the
need
to
tune
circuits
within
a
band.
Just
turn the
Band
switch
and
select
the desired frequency.
The
design
of the
wide-band
front-end
stages elimi-
nates the
need
for the
customary
RF
amplifier in
the receiver section. This
results in a receiver that
can properly handle incoming
signals
with
a
wide
dynamic
range. Also, only
one
frequency conversion
is
used
in the
main
signal path
of
the receiver
sec-
tion.
This
is
done
to
reduce spurious responses
(bir-
dies)
and
to
maintain high image
rejection.
Power
for this
Transceiver can be
furnished
by
a
power
supply, such
as the
Heathkit
Model PSA-9
Power
Supply,
or directly
from any
regulated 12.6
VDC
source
that
can supply
at least 1
ampere.
To
align this Transceiver,
you
should have
a
VTVM
(vacuum-tube
voltmeter) or
VOM
(volt-ohmmeter),
a
frequency counter capable
of
measuring
frequen-
cies
accurately
up
to at
least
10
MHz,
and
a
50-ohm
resistive
dummy
load.
The
following
features are also included
in
your
Transceiver:
•
Solid-state transmit/receive switching
that
permits
full
break-in operation.
• Continuously
variable
RF
power
output.
•
Receiver incremental tuning
(RIT).
•
An
audio-active
filter
with
selectable
wide
or
narrow
selectivity.
•
A
front
panel meter
that indicates signal
strength in
receive
and
relative
power
in
transmit.
This Transceiver
is
a
handy
addition
to
any
ham
shack
for
avid
QRP
operators,
newcomers,
or
old
timers
alike.