Heathkit GR-54 User Manual

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

Heathkit GR-54 Specifications

General

Brand	Heathkit
Model	GR-54
Category	Receiver
Language	English