Heathkit GR-78 - Page 51

Page 117
SCHEMATIC OF THE
HEATHKIT®
GENERAL COVERAGE RECEIVER
MODEL GR-78
notes
100-199 Arsen BOARD.
2. ALL HESISTORS ARE 1/2 WATT UNLESS MAMKLD OTHERWISE
SWITCH
WAFERS
ARE
IW
WAND
A
POSITION
AS
VIEWED
FHOM
tHE
YLIADE
MEASUREMENTS
ARE
MADE
WITHTHE
SMITENES
AND
CONTHOLS
HbfeR
Aoaust
VIC
TURN
CLOGRN
St
AMeuisse
Cw/sse
FostTt
4 Driis srmso novcares 4 positive oe vourase weasuRenent
CHAS GROUNO. VOLTAGES HAT WARY sage. "s 'U/MT INDICATED
1 Av riis sro inorcares AW RF vouTaGe.
4. G7 tWis syuaOL Wwotcares a cHRcuT BoaRD GROUND
WIS SYMBOL INDICATES A CHASSIS OROUND
10. Sams ‘SYMBOL INDICATES CONNECTING POINTS TO THE CIRCUIT
1.—+1Ms svMaDL InolcaTEs A cLocKW)SE ROTATION oF coKTHOLS
AS VILWEE THON THE KNDB.END OF THE SHAFT
Ui. JB AWS SYMBOL INDVCATES A RocRER sw TH
MET pHs SYMBOL INDICATES THE GROUND CONNECTIONS MADE AY THE
SESH TCH-NOARO GUIDES
18. THE D075 0 SoME SWITCH ROTORS INDIEATES-A CONNECTION ¥ROM
16 anni SyMgo, INBICATES 4 06 VOLTAGE THAT VARIES DEPLNBING
CMMs SYMHOL INDICATES A VOUTAGE An HAND ONLY
1s site in cw/ssa Position