Heathkit GR-78 - Page 3

INTRODUCTION
‘The Heathkit Model GR.78 General Coverage Receiver is
designed primarily for amateur ant shortwave listener use,
Many new cireut components and design concepts have
ban
usd
to
provide
the
war
with
a
portable
receive
having
many features of higher priced units,
Six bans provide coverage from 190 KH to 30 Me, with
ouble conversion on the 18 to 30 MHz band. An
AAN-OWISS8. snitch enables the operator to select AM
(implitde modulation), CW (contiwous wave, or 888
(single sideband) reception, The Recover features calibeated
‘bandspreod for elther the major shortwave broadcast bands
oF the ematour bad,
This compact, lightweight Recelver operates from on
Iara recharowble nickal-cadmium battery for portable
operation. The battery canbe charged rom a 120/240 VAC
oF 12 to 15 VOC power source. The buttery recharges when
the receiver i tured OFF and connested to one of these
ower soures,
Fr night readings, (Wo front pone amps are included with
a sprinprturn Light switch to conserve battery lite,
Other features include» collapsible carrying han, builtin
500
KH
erystal
calibrator,
operation
from
a
bultin
whip
antenna oF extemal antenna, an automstic noise limiter
iret, lywhee tuning, and no-adjust ceramic 1 ters for
sharp selectivity. Plugin, modular witeh-booeds contain the
‘band
switching
circuits
lantenna,
RF
amplifier,
mixer
anc
‘ccilator) and provide tosy assembly and service, The all
solidstate circuitry includes thrtwenslcon transistor, five
‘of
which
are
high
gain
FET's
(Veldetfct
transistors);
and
{wo germanium transistors. A separate FET product
‘detector provides superior CW and SSB reception, A,
twansformories oudio output clreuit, combined with the
solid-state
circuits,
minimizos
current
drain,
The
rugped
Construction and convenient operation are sure to provide
Yyou with many hours of dependable use and roaxed
‘enjoyment.
Refer to the “Kit Builders
Guide™ for addtional,
Information
on
unpacking,
parts
identification,
too,
wing,
soldering, and step-by-step assembly procedure,