Heathkit IB 2A Manual
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Page 1
'PRICE $52-00
W: H: GREENE
HEAT~HKIT® i
.ASSEMBLYf MANUAL
HEATHKIT
IMPEDANCE BRIDGE
MODEL IB-2A
Page 2
This chart is a guide to commonly used types of elec-
tronic components. The symbols and related illustra-
TYPICAL COMPONENT TYPES
tions should prove helpful in identifying most parts and
reading the schematic diagrams.
2 -It-
cApAcrrolfl
\ PLATE
5UFPRESSDR
SCREEN
GRID TUBE
cATHODE ,
A / FILAMENT
POTENTIOMETER
(CONTROL)
%
ELECTROLYTIC
CAPACITOR
PM P COLLECTOR
TRANSISTOR
BASE
EMITTER
COLLECTOR
- ETSE® I
NPN EMITTER
TRANSFORMER
(IRON CORE)
I (DIODE
RECTIFIER
TRANSFORMER
| | (ADJUSTABLE
' POWDERED IRON
I I CORE) ARROW
II INDICATES DIR-
! I
ECTION 0F CORE
MOVEMENT TO
BATTERY
Bill'-
NEON
BULB
TRANSFORMER f
(ADJUSTABLE
CORE)
ILLUM I NATING
BULB W9
POWER
TRANS-
FORMER
PHONE
JACK
fi
.-
SPST SWITCH
, Indtfitance
HE
E
INDUCTOR (TOGGLE)
(COIL) 0"}.-
u
_. .J._
DFDT
PIEZOELECTRIC . SWITCH
H CRYSTAL (ROTARY)
o
[ S PEAKER
MICROPHONE
(Elf
D: a
V L:
LOOP
GENERAL
EARTH GROUND
+77
4.;
CHASSIS GROUND
CONNECTE
CONDUCTORS
ALEE-e
NOT D CONNECTED SHIELDED
ASSEMBLY AND OPERATION OF THE
IMPEDANCE BRIDGE
HEATHKIT
MODEL
3. 2 A w. H.- GREENE?-
Circuit...............
DC Measurements........
Meter................
AC Measurements........
Detector...............
Resistance ... . . . . . .
Capacitance. . ....... . . . . .
Dissipation Factor (D). . . . ..
Storage Factor (Q). . . . . . . .
Accuracy.. .. . .... . .. .. .
Power Requirements.
Tube Complement. .
Power Supply. . . . .
Cabinet Size. . . . . .
Shipping Weight. . . .
. . . . .
. . o . .
. . o . .
. n . a .
o . ¢ - .
. . . . .
.4....
Inc..-
SPECIFICATIONS
4-arm impedance bridge.
Built-in power supply Operating directly from 110 V AC. Panel
binding posts provide for use of external supply.
100-0-100 microampere meter.
Built-in 1000 cycle vacuum tube oscillator. Terminals on
p'anéf provide for connecting an external generator for meas-
urement at other frequencies.
Vacuum tube detector and rectifier make use of built-in meter.
Panel binding posts provide for connection to external detector.
0.1 o to 10 megohm.
100 uufd to TOO ufd.
0.1 mil to 100 11.
0.002 to 1.
0.1 to 1000.
1/2 of 1% decade resistors used. 1/2 of 1% silver mica con-
densers used. Accuracy is limited more by interpretation of
scales and workmanship of assembly. The following is normal:
Resistance i3%
Capacitance 13%
Inductance i10%
Dissipation Factor (D = a) CR) :I:ZO%
Storage Factor (Q = w L/R) 520%
Accuracy will fall off at extreme outer limits.
105-125 volts, 50/60 cycles, 10 watt. '
2 - 1U4 and 2 - 1L4.
. Power Transformer, silicon diode, and bridge rectifier.
8" high x 1'7" wide x 6" deep.
15 lbs.
varlaht © 1958
Hum company
All right; named
11/26/65
Page 19
595-156..
7
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