Heathkit GR 98 Schematic 2

Page 1

AMPLIFIER
G101

5107: cm

EXTERNAL
ANTENNA

i
LOCAL Y m
OSCILLATOR 25 l

"2 2" 9103

J:-

|
\
I
I
*-l

Magma wTTH m sTcmL

5mm
(5:chst

1
L
V
1
HEATH MANUFACTURER BASING T
PART NO. AND TYPE NO, (VTEWEC FROM BOTTOMT I L
l
. ,/BASE
4177113 GE 2mm ~COLLECTOR
*~~EM|TTER T
,r/ENHTTER
4177121 AMPEREX 2N2430 @BASE
COLLECTOR ,-- ............. _--_--.
I TO 2 OF RED
/EMmER mm»: we
4177122 AMPEREX 2N2431 tBASE
COLLECTOR L
GRA-BB-l 5*
,, ,AEMITTER AC pOWER
417'293 FAKRCHHD ZN5770 [:0] BASE (
0 SU
~COLLECTOR PP _m
a,
(/BASE
4177201 GE XZJASZ) g COLLECTOR
* EMITTER _
/GATE _
4177169 MOTOROLA MPE 105 gamma
«ORALN [

Page 2

u
#52-I2T

IF
AMPLIFIER
(:4
2N5770

CRYSTAL
OSCILLATOR fig;

AUDIO

Its PREAMPLIFIER PREAMPLIFIEI

/
Q!
)5? ®

--:-- ----------- -- NOTES:
CaAk) 1 ALL RESISTOR VALUES ARE IN OHMS; K=1000. 5. SELECTOR SWITCH IS SHOWN IN VARIABLE
5 2. ALL RESISTORS ARE 1/2 WATT. s VINDICATES CIRCUIT BOARD GROUND.

3. ALL CAPACITOR VALUES LESS THAN 1 ARE IN uF, VALUES 0F 1 AND 7 gINDICATES CHASSIS GROUND,

ABOVE ARE IN DF UNLESS MARKED OTHERWISE.
O INDICATES TUNER CONNECTION.
4' DC VOLTAGE MEASUREMENTS ARE TAKEN WITH A HIOH IMPEDANCE VOLTMETER
FROM THE POINT INDICATED T0 CHASSIS GROUND WITH ERESH BATTERIES IN 9 BINDICATES CIRCUIT BOMB CONNECT
THE RECEIVER. VOLTAGES CAN VARY : 20%.

10 GINDICATES PARTS MOUNTED ON THE CI

THIS SYMBOL INDICATES A MEASUREMENT TAKEN WITH THE SQUELCH

CONTROL FULLY COUNTERCLOCKWISE. 11 RESISTORS AND CAPACITORS ARE IN THE I
199 CHASSIS AND CIRC
I:ITH|S SYMBOL INDICATES A MEASUREMENT TAKEN WITH SQUELCH 100'199 AM TUNER PARTS.

CONTROL AT THE THRESHOLD ISEE SQUELCH IN FIG, I),

THIS SYMBOL INDICATES A MEASUREMENT TAKEN UNDER THE FOLLOWING
CONDITIONS-
WITH OSC SWITCH IN THE XTAL POSITION
A CRYSTAL IN THE CRYSTAL SOCKET.
AND NO SIGNAL INPUT,