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Page
57
Sma
HEATHEIT
Be
Controls,
. . wee e rene
eee meee
eee esses
Rear
Panel
Connectors.
.
..-22.ccccccenes
Antenna
Input
Impedance,
.
...2.esce00200s
Audio
Output Impedance, .....eeececeeene
Dimensions,
.
2. wassecsescncesencuece
Net
Weight...
cn
ence
ncn
e ese
cere
se
nee
Bandspread,
AF Gain, with OF F-ON
RF Gain,
ANT Trim,
Mode, with AM, USB and LSB positions,
Band, with A, B, C,D, and E positions,
Main
.
AVC (automatic volume control).
ANL (automatic noise limiter},
OPR, with REC and STDBY positions,
Bante
Adztent
ne
wane
nmannl
MECC
HUUSt
OF
Pear
pasmca,
switch,
ANT,
CW Key,
Phones or EXT Spkr,
30 2 to 75 2.
82,
14-5/8" wide x 6-5/16" high x 10-15/16" deep,
18.6 lbs,
ject to chat
ange without notice,
es the right to discon-
Refer to the Schematic (fold-out from Page 63)
and to the Block Diagram (fold-out from Page 48)
while reading the following description, All cir-
cuits will be described with the Mode and Band
switches
in their fully counterclockwise
posi-
tions,
as
they
are
shown
on
the
Schematic,
The
RF
signals
received
by the antenna are
coupled to the primary winding of coil L1, The
secondary winding of coil Li and Main Tuning
canacitor
C1A
selart
a station
frequency,
This
apacitor
C1A select a station frequency,
This
signal is coupled through capacitor
C5 to the
control grid of RF amplifier tube V1,
The output signal from the plate of tube V1 is
tuned by capacitor CiB and coil L6,.This signal
is then
coupled
through capacitor
C13 to the
control grid of mixer tube V2,
incorporate ni new wy features
viously sold,
Tube V2 has two sections: a mixer, V2A; and an
on ee
wee
tlind.-
fo.n etn nes io
oscillator,
V2B,
The
USBUCMIALUT
ID CYUCUL yy
is
determined by capacitor C1C and coil L11, The
signal
from
the oscillator
is coupled through
capacitor C16 to the control grid of mixer tube
V2A, The incoming signal and the oscillator sig-
nal are heterodyned
(mixed) in tube V2A, re-
suiting in an IF frequency,
The IF signal, along with the other unwanted sig-
nals
are
coupled
from
the
nlate
of V2A
to IF
SOV
oe kes
pases
transformer
T1, This transformer selects only
the
IF signal
and
couples
it to the
crystal
filter,
A half-lattice
crystal filter is used.in the sec-
eeary winding: of transformer Ti, This crystal
hhandmenaa
that
an
tT
harrow
is
oanapass
wiar
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