Heathkit IB-5281 - Page 63

SCHEMATIC OF THE
HEATHKIT®
MODEL IB-5281
TT RLC BRIDGE
+ +B +6 +B |
R47 |
| +8 Hor
—_
100
|
20uF
ee
G
V
NOTES
417-235
Q9
XN
i
:
417-235
i.
ALL
RESISTORS
ARE
1/2
WATT,
5%
UNLESS
OTHERWISE
Q
|
SPECIFIED,
RESISTOR
VALUES
ARE
IN
OHMS
(K-1,
000
439
A"
94
CED
M=1,
000,
000).
2000
40
a
a
,
2.
CAPACITORS
ARE
IN
PF
UNLESS
SPECIFIED
OTHERWISE.
6 2000 ~_ -
-
QIOQ
3.
SW1AND
SW3
ARE
SLIDE
SWITCHES
AND
SW2
IS
A
R40
417-235
ROTARY
SWITCH.
i
I
8
d
4.
©
THIS
SYMBOL
INDICATES
A
DC
VOLTAGE
TAKEN
UNDER
THE
FOLLOWING
CONDITIONS
FROM
THE
POINT
A oa T TH
INDICATED TO CHASSIS GROUND WITH A HIGH
nae
om
ba
a
IMPEDANCE
VOLTMETER:
e—
oe
>
Zy=0
A
A. 4
B. LEVEL CONTROL-MAXIMUM CCW
C. BALANCE CONTROL-CENTERED
D. RANGE SWITCH-EXT. STD. (Zo).
5.
V
THIS
SYMBOL
INDICATES
CIRCUIT
GROUND.
6.
O
THIS
SYMBOL
INDICATES
A
SWITCH
LUG.
Lis
va
T.
THIS
SYMBOL
INDICATES
A
LETTERED
CIRCUIT
BOARD
CONNECTION
THAT
IS
SOLDERED.
+50UF
56-89
R49
i
8.
VOLTAGES
MAY
VARY
10%.
-8
9.
+A
AND
-A
INDICATE
AC
GENERATOR
SUPPLY
VOLTAGE.
CD
10.
+B
AND
~B
INDICATE
METER
AMPLIFIER
SUPPLY
VOLTAGE.
AB
R52
AS3
11.
WAVEFORMS
ARE
TAKEN
WITH
THE
RANGE
SWITCH
AT
THE
7
POOF
1008
Zs
POSITION.
an
.
?
OFF/ON
2
tee
t*2
4
Swi
°
a
¢20
a
c2I
¢)
Swi
3
i
y
‘tT
1O0UF
te
1
Zz
Y
5
nnn.
seen
a
ciara,
irae
iri
t
7
LINE/BATT.
witH
|
WITH
°"@
@
POWER
!
'
BATTERIES
!
SW
SUPPLY
1
1
ONLY
\
i
U
r
Ls
fd
-
ee
ee
oe
—
—
'
r
—
—
i
-
1
H
——
=
'
|
a
*
P1
H
}
L
_
+
'
v4
V
H
$
T
'
i
|
)-*
'
1
a
L
1
Part
of
595-1958-03
fon
i
1
]
5
GAN
i
‘
H
Reo
|
tov
|
5
5
{
i
1
1
VY
H
H
i
Copyright
©
1877
=saecoe
seen
eee
ee
eee
re
|
Heath Company
All Rights Reserved
Printed iri the United States of America