Eddystone 990R - Appendix A; Voltage Analysis

APPENDIX
"A"
VOLTAGE
ANALYSIS
The
following
"Table of Voltage
Values"
will
prove
useful in
the
event
of
the
rec-
eiver
developing
a
fault
which
makes
it
necessary
to
carry out
voltage
checks.
All
readings
are
typical and
were
taken
with
a
meter
having
a
sensitivity
of
20,0000/V.
A
nominal
tolerance
of
IQf/o
will
apply
to
readings
taken
with
a meter of
this
sensitivity
and
the
tolerance should be
increased
accordingly
if
a
meter
of lower
sensitivity
is
employed.
Readings
are quoted
on
the
basis
of
an applied
AC
mains
supply
of 240V
under
no-signal conditions
with
the
controls
set
as follows
s-
RANGE
SWITCH
TUNING
SYSTEM SWITCH
RF/IF GAINS
AF GAIN
LINE LEVEL
MODE
SWITCH
METER
ZERO
MANUAL/AGC
SWITCH
IF
INPUT
SWITCH
CALIBRATOR
SWITCH
Range
1
.
220
MHz.
N
(Normal
-
manual
tuning)
.
Maximum
.
Maximum
.
Maximum.
AM.
Set
to
zero
meter.
MANUAL
.
OFF
("up"
position).
OR.
Ref Emitter
Base
Collector
Botes
TRl
7
.
4
V
6.8V
,t
"
- — 1
2.2V
TR2
9
.
55
V
9
. IV
0.03V
TR3
8 .
7
V
8.3V
ov
NOTE
1.
TR4
C-5Y
'
6
•‘TV
0-5Y
NOTE
2.
TR5
9.6V
9.
iv
ov
NOTE
3.
TR
6
9.4V
8 . 8
V
ov
NOTE
3.
TR7
9.3V
8.75V
ov
NOTE
2
.
TR
8
8.0V
3
.
3
V
ov
NOTE
4
.
TR9
8.75V
8
.
6
V
0
.
07
V
NOTE
4
.
TRIO
7
.
3
V
6
.
8
V
2.55V
TR11
8
. 8
V
8.5V
ov
NOTE
5.
TRl2
8
.
9
V
8
.
5
V
ov
NOTE
5.
TR13
8.9V
8.5V
ov
NOTE
6 .
TR14
CO
a
7-7V
I
ov
NOTE
6
.
TRl
5
6 .
65
V
6.1V
2
.
7
V
TR16
6.7V
6.1V
3.2V
TR17
2*
IV
2
.
75
V
9
.
05
V
TR18
9
.
2V
8.9V
2
.
7
V
NOTE
7
.
TR18A
9.2V
8.9V
2
.
7
V
NOTE
7-
33
-