Heathkit ID 1290 Schematic
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Extracted text from Heathkit ID 1290 Schematic (Ocr-read)
Page 1
SCHEMATIC or THE
HEATHKIT®
WEATHER STATION
MODEL lD-1290
EsISTORS ARE Ilz WATT. VALUES ARE SHOWN IN UHMS,
\NS T0 MULTIPLV THE VALUE SHOWN 3v 1.00m A CONTROL
TABLE RESISTOR! IIAS ONE CUNIACI SHOWN EV AN
WMEAD.
CITOR VALUES ARE SHOWN lN MICRDFARADS.
EVIA'IIUNS:
CAPACITOR
DIODE
LAMP
METER
zsrun
PERMANENT MAGNET
TRANSISTOR
RESISTOR
SWITCH
- TRANSFORMER
= VEST POINT
.i
van/Ix:
mu» m
nos-T25
LETTERED CIRCUIT BOARD HOLE VAC
CIRCUIT BOARD GROUND
A OI: VOLTAGE TO GROUND
AN Ac VOLTAGE
A DC VOLTAGEVSZOI OPEN
A DE VOLTAGESZDI CLOSED
PONENTS ARE NUMBERED ON THE SCHEMAIIC IN THE
owmc GROUPS
I. W RECKIVER CIRCUIT BOARD
10] 19? WIND DIRECTION TRANSMITTER
201 rZWWIND SPEED TRANSMITTER
ISISTORS: C9 (5
NPN TRANSISTOR PNP TRANSISTOR
a - BASE
c : COLLECTOR
E EMITTER
/
RIBBED
EDGE
___--______________-g--------------_----------------_----___----__-
RECEIVER CIRCUIT BOARD
D2
LI
UPPER LAMP LIGHTED = @
LOWER LAMP LIGHTED = (33
BOTH LAMPS LIGHTED = ®
NEITHER LAMP LIGHTED -@
VOLTAGE 0N GREEN,
WHITEBROWNDR
RED WIRES,
WIND DIRECTIO
SENDER
\CSIOI
417-IIB
Ma
330K
I SHIELD DE 0202
:WIND SPEED