Heathkit GRA 88 1 Schematic

Page 1

BLK

POWER TRANSFORMER
IZOVAC WIRING

1/8 AMP
FUSE

TO OFF-0N
SWITCH IN
RECEIVER

"\

POWER
TRANSFORMER
240VAC

WIRING

I

m
I
3

_________.____.___|

GR-ee 0R GR-ga REEIER __--]

ON-OFF
SWITCH

ALP-ff

SLK

_ 9V BATTERY I
9VDC - (6"'CCELL$)|
T0 RECEIVER
CIRCUITS

IIHI

SCHEMATIC or THE
HEATHKIT®

AC POWER SUPPLY
MODEL GRA-88-1

NOTES:

I.©THIS SYMBOL INDICATES A POSITIVE DC
VOLTAGE MEASUREMENT THAT WAS TAKEN
WITH A HIGH IMPEDANCE INPUT VOLTMETER
FROM THE POINT INDICATED TO CHASSIS
GROUNDL

2. REFER TO THE CHASSIS PHOTO FOR THE

PHYSICAL LOCATION OF PARTS.