Heathkit IB 2A Manual

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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