jordan 710-4 User manual
and
maintenance
INSTRUCTIONS
Radiation
Survey
Meter
Jordan
Model
710-4
FCDA
Item
No.
CD
V-710—
Model
No.
4
Jordan
Electronics,
Inc.
3025
West
Mission
Road
Alhambra,
California
ES
TABLE
OF
CONTENTS
Page
1.0
general
descri
E
3
2.0
theory
of
operation
2.1
Tonization
Chamber
4
2.2
Electrometer
Tube
4
2.3
Measuring
Circuit
.
5
2.4
Circuit
Check
.
5
2.5
Zero
Controls
.
6
3.0
installation
3.1
Inspection...
6
3.2
Batteries
6
4.0
operation
4.1
Operational
Checks
<
s
ioa
< $
«e
2
7
4.2
Taking
Readings
. .
.
.
.
.
.
.
. .
. .
7
5.0
operator's
maintenance
5.1
Battery
Replacement
.
.
. .
. . .
7
5:2
Cleaning,
.
5
.
141 de,
e a
i3
46
e.
e
a
7
6.0
preventive
maintenance
.
.
. . .
. . .
8
7.0
corrective
maintenance
7A
Tools
Required
. .
. . .
8
7.2
Disassembly
,
i
8
7.3
Calibration
9
7.4
Batteries
»
aee
ps
9
7.5
Trouble
Shooting
.
.
.
9
8.0
replaceable
parts
8.1
Mechanical
Components.
.
.
. .
.
.
.
.
.12
8.2
Maintenance
Supply
Parts
.
zx
MLfa
3
d
8.3
Names
and
Addresses
of
Manufacturers
HP
ECCE
ES
8.4
Electrical
Components
. .
. .
.
.
. .
.
5
illustrations
Figure
|
—
The
Basic
Circuit
.
.
.
V
as).
$
Figure
2
—
The
JORDAN
710-4
with
Case
Removed
.
.
6
Figure
3
—
The
JORDAN
710-4
Disassembled
for
Servicing
.
12
Figure
4—
Wiring
Diagram
.
.
14
operating
and
maintenance
instructions
1.0
GENERAL
DESCRIPTION
1.1
ranges
The
Jordan
710-4
measures
the
intensity
of
gamma
radiation
up
to
50
roentgens
per
hour
(r/ht).
Three
ranges
are
provided,
0-.5,
0-5
and
0-50
r/hr.
On
the
lowest
(0-.5
r/hr)
range,
the
small
division
on
the
scale
is
02
r
hr
and.
by
interpolation,
measurements
can
be
made
in
increments
of
.01
r/hr.
Intensities
higher
than
50
r/hr
are
indicated
by
the
meter
read-
ing
off
scale,
and
the
instrument
is
not
harmed.
1.2
ionization
chamber
The
sensing
element
in
the
Jordan
710-4
is
an
air
equivalent
plastic
ioniza-
tion
chamber
in
an
hermetically
sealed
stec)
enclosure.
All
the
desirable
qualities
of
the
usual
plastic
chamber
are
maintained,
while
sealing
the
chamber
minimizes
the
effects
of
temperature
and
climinates
the
altitude
and
moisture
effects.
1.3
spectral
response
The
accuracy
of
this
instrument
is
not
affected
by
changes
in
energy
level
trom
08
Mev
(Million
clectron
volts)
to
1.2
Mev.
This
is
the
range
required
to
measure
gamma
radiation
of
the
various
energies
encountered
in
fission
products
1.4
accuracy
l'he
accuracy
of
this
instrument
is
`
20%
when
used
in
temperatures
toni
20
+
to.
>
125^F,
The
accuracy
is
not
affected
by
altitude,
and
the
instru-
ment
will
not
respond
to
light
òr
radio
Frequency
radiations.
The
case
is
waterlight
to
withstand
immersion,
and
the
housing
containing
the
critical
measurmg
components
is
gasketed
ta
prevent
any
effects
of
moisture.
Unde;
normal
operating
conditions
the
measuring
error
is
iess
than
106;
,
1.5
controls
Two
controls
are
provides.
(See
figure
1.)
ihe
RANGE
SWITCH
is
used
to
turn
on
the
instrument,
check
its
proper
functioning,
and
select
the
required
range.
The
ZERO
CONTROL
js
used
to
adjust
the
circuit
to
insure
correct
readings.
1.6
circuit
check
The
proper
functioning
of
the
measuring
circuit
including
the
batteries
may
be
checked
by
setting
the
range
switch
to
CIRCUIT
CHECK
and
observing
the
meter
reading.
The
limits
of
acceptable
indication
cover
the
top
40%
of
the
scale,
and
a
reliable
indication
of
the
condition
of
thc
instrument
is
available,
1.7
batteries
Two
"D"
size
flashlight
cells,
NEDA
type
13
and
one
22.5
volt
"B"
battery,
NEDA
type
215
arc
used.
The
operating
life
for
continuous
duty
is
200
hours
and.
for
intermittent
use,
about
twice
this
figure.
1.8
meter
The
meter
in
the
Jordan
770-4
uses
the
new
core
magnet
movement.
Tt
will
withstand
the
shock
and
vibration
of
rough
field
use,
and
it
is
sealed
in
a
plastic
case
to
prevent
damage
from
dust
and
moisture.
1.9
physical
features
The
instrument
is
approximately
4"
wide,
7"
long
and
3"
high,
excluding
the
handle.
The
instrument
weighs
only
2
Ibs.
4
oz.
The
case
and
handle
are
molded
of
tough,
durable
plastic
and
are
reinforced
to
withstand
high
impact
shock
and
rough
treatment.
A
separate
battery
compartment
is
molded
into.
the
lower
case
to
prevent
Icaky
batteries
from
damaging
other
components.
The
Jordan
710-4
has
passed
a
rugged
military
shock
test
(MII.-T-17113)
and
will
withstand
considerable
abusc
without
loss
of
accuracy.
2.0
THEORY
OF
OPERATION
2.1
ionization
chamber
The
sensing
element
of
the
Jordan
710-4
is
an
hermetically
sealed
ionization
chamber
with
air
equivalent
plastic
walls,
This
comprises
a
cylindrical
air
container
called
the
shall
and
a
dise,
centrally
located
within
it,
called
the
collector.
The
coliector
is
insulated
from
the
shell
which
is
operaicd
at
a
potential
of
approximately
22.5
volts
positive
with
respect
to
the
collector,
Gamma
rays
passing
through
the
chamber
shell
cause
the
air
molecules
to
become
charged
positively
and
thus
become
ions.
Having
a
positive
charge,
the
ions
arc
repelled
from
the
positive
(-!
22.5V)
shell,
and
they
go
to
the
collector,
The
number
of
ions
thus
formed
is
proportional
to
the
intensity
of
the
radiation.
The
collection
of
these
positive
ions
creates
a
current
that
flows
from
the
chamber
coliector
to
the
measuring
circuit
where
it
is
amplified
to
operate
the
meter.
2.2
electrometer
tube
The
very
small
ionization
current
from
the
chamber
collector
(.000003
microampere
at
.5
r/hr)
flows
through
an
extremely
high
resistor
(160,000
YÏ
megohms)
and
develops
a
measurable
voltage
across
this
"high-meg"
resistor.
This
voltage
is
applied
to
the
grid
of
a
vacuum
tube
which
is
called
an
electrometer
tube
because
it
is
capable
of
measuring
voltages
at
extremely
small
current
values.
The
electrometer
tube
is
connected
as
a
triode.
Its
three
elements
arc
the
filament
which
when
heated
by
current
from
the
"D"
cell
emits
electrons.
the
grid
which
controls
the
flow
of
these
electrons
according
to
the
voltage
applicd
to
it,
and
the
plate
which
receives
the
elec-
trons
and
passes
them
to
the
circuit
in
the
form
of
a
measurable
current.
2.3
measuring
circuit
A
current
i,.
flowing
from
the
"B"
battery
B,
through
resistors
R,,
Ry,
R.
and
R,
produces
thc
voltages
necessary
to
operate
the
circuit.
From
thc
positive
terminal
of
B4,
the
voltage
e,
is
connected
to
the
shell
of
the
ionization
chamber.
A
lower
voltage
e,
supplies
the
plate
of
the
clectrom-
eter
tube
VT.
The
filament
(cathode)
of
the
electrometer
tube
is
operated
at
the
voltage
e,
while
the
grid
operates
at
the
CHASSIS
GROUND
potential.
This
supplies
the
required
negative
grid
voltage.
The
meter
M
is
connected
in
the
cathode
circuit
of
the
clectrometer
tube.
Changes
in
the
grid
voltage
of
the
electrometer
tube
cau:
anges
in
the
current
flowing
through
the
meter,
thus
producing
the
required
indication,
2.4
circuit
check
A
very
small
portion
e,
of
the
voltage
from
the
“B”
battery
B;
is
impressed
on
the
grid
of
the
electrometer
tube
VT
when
the
switch
is
turned
to
the
circuit
check
position.
This
voltage
e,
is
selected
to
make
the
meter
read
approximately
full
scale.
Deterioration
of
any
of
the
components
or
bat-
teries
in
the
circuit
will
change
this
reading.
This
voltage
can,
therefore,
be
used
to
check
the
entire
circuit
with
the
exception
of
the
ionization
cham-
ber
and
high-meg
resistor.
vs
2.5
zero
controls
The
voltage
e,
developed
across
resistors
R,
and
R,,
produces
a
current
i,
through
R,,
the
meter
M,
and
R,.
The
variable
resistor
R;
(COARSE
ZERO
control)
is
adjusted
at
the
factory
to
make
the
current
i;
equal
and
opposite
to
the
plate
current
i,
when
the
grid
voltage
is
zero.
Thus.
the
meter
reads
zero
when
there
is
no
radiation.
Small
adjustments
to
zero
the
instrument
in
a
radiation
ficld
arc
made
by
turning
the
range
switch
to
the
ZERO
position
to
ground
the
current
from
the
ionization
chamber
and
thus
simulate
the
“no
radiation"
condition.
The
variable
resistor
R,
(ZERO)
is
then
adjusted
to
make
the
meter
read
zero.
3.0
INSTALLATION
3.1
inspection
The
instrument
is
shipped
with
the
batteries
packed
separately
to
prevent
damage
to
the
instrument
from
battery
leakage.
Inspect
the
instrument
carefully
for
any
signs
of
damage
in
shipment.
If
any
damage
is
apparent,
the
batteries
should
not
be
installed
until
an
clectrical
check
is
made
to
prevent
a
short
circuit
causing
further
damage.
3.2
batteries
Remove
the
toggle
clamps
holding
the
lower
case
and
open
the
case.
,
Bi
upper
Note
that
compartments
molded
into
LASE
the
lower
case
locate
and
hold
the
batteries.
The
batteries
must
be
in-
stalled
in
their
proper
positions
to
permit
replacing
the
lower
case.
Observe
the
polarity
markings
at
each
battery
contact.
Install
the
batteries
in
their
proper
positions
and
check
to
sce
that
the
battery
contacts
apply
pressure
to
the
battery
terminals,
H
the
pressure
appears
insuflicient
to
insure
good
contact,
remove
the
battery
and
squeeze
the
contacts
together
slightly
to
increase
the
contact
pressure.
Figure
2
—
The
Jordan
710-4
with
lower
case
removed
When
the
batteries
arc
installed,
turn
the
range
switch
to
the
ZERO
position
and
adjust
the
ZERO
control
to
make
the
meter
read
zero.
Turn
the
range
switch
to
the
CIRCUIT
CHECK
position
and
sec
that
the
meter
reads
within
the
red
circuit
check
markings.
If
these
indications
can
not
be
obtained,
refer
to
section
7.5
for
trouble
shooting
procedures.
If
the
circuit
check
indication
is
proper,
replace
the
lower
case
and
fasten
the
toggle
clamps.
The
instrument
is
now
ready
for
operation.
1f
the
shoulder
strap
is
required,
snap
the
metal
fasteners
onto
the
buttons
provided
on
each
end
of
the
instrument
and
adjust
the
buckle
to
the
desired
length.
p
4.0
OPERATION
4.1
operational
checks
Turn
the
range
switch
to
thc
ZERO
position,
wait
a
minute
or
two
for
the
electrometer
tube
to
warm
up
and
adjust
the
ZERO
control
to
make
the
meter
read
zero.
“Turn
the
range
switch
to
the
CIRCUIT
CHECK
position.
The
meter
should
read
within
the red
hand
marked
CIRCUIT
CHECK.
If
it
does
not,
the
batteries
may
be
dead.
or
trouble
may
exist
in
the
circuit.
Sec
sections
5
and
7
for
maintenance
procedures.
When
the
batteries
are
new.
the
meter
should
read near
the
top
of
the
circuit
check
band.
When
the
reading
nears.
the
bottom
of
the
band,
the
batteries
should
be
replaced.
The
CIRCUIT
CHECK
does
not
test
the
chamber
or
the
high-meg
resistors.
4.2
taking
readings
Turn
the
range
switch
to
the
X-100,
X-10
or
X-1
range
as
required
and
read
the
radiation
intensity
indication
on
the
meter.
The
meter
readings
must
be
multiplied
by
the
factor
for
the
range
being
used.
For
example.
a
meter
reading
of
.35
on
the
X-10
range
indicates
3.5
r/hr,
On
the
X-100
range
the
intensity
would
be
35
r,
hr.
When
several
readings
will
be
taken
in
an
hour,
or
the
instrument
will
be
used
frequently
during
a
day,
it
is
advisable
to
leave
it
turned
on
during
the
entire
period
of
use.
The
instrument
is
equally
sensitive
to
radiation
from
the
sides,
front
and
bottom.
.5.0
OPERATOR'S
MAINTENANCE
5.1
battery
replacement
The
batteries
should
be
replaced
when
the
CIRCUIT
CHFCK
setting
on
the
range
switch
makes
the
meter
read
near
the
low
end
of
the
CIRCUIT.
CHECK
band.
To
replace
batteries,
remove
the
toggle
clamps
and
the
lower
case
and
remove
the
old
batteries.
These
should
be
discarded
immediately
to
prevent
their
being
inadvertently
re-used.
Inspect
the
battery
contacts
and
clean
if
necessary.
Install
new
batteries
as
described
in
section
3.2.
If
the
batteries
arc
to
be
removed
and
reinstalled,
be
sure
that
B,
and
B,
are
not
interchanged.
A
voltmeter
check
will
show
that
the
voltage
of
Ba
is
always
higher
than
that
of
B,.
5.2
cleaning
WARNING:
Do
not
use
cleaning
solvents
on
the
plastic
parts.
To
clean
the
case,
use
soap
and
water.
If
the
batteries
have
leaked,
remove
the
lower
case
and
fill
only
the
battery
compartment
with
warm
water.
The
battery
"goo"
will
be
loosened
in
a
short
while
and
can
be
easily
rinsed
out.
Be
careful
not
to
soak
off
the
circuit
diagram
or
the
CD
decal.
“7
6.0
PREVENTIVE
MAINTENANCE
Preventive
maintenance
is
required
once
every
six
months
of
storage,
once
every
month
of
occasional
usc,
or
prior
to
any
critical
period
of
use.
The
batteries
should
be
removed
and
checked
for
corrosion
and
cleaned
if
ary.
The
battery
contacts
in
the
instrument
should
be
carefully
cleaned
ary.
Any
leaking
batteries
should
be
discarded
and
replaced.
Check
the
calibration
against
a
standard
gamma
source
and
adjust
if
necessary
according
to
thc
instructions
in
section
7.
1f
the
instrument
is
to
be
stored
for
more
than
a
few
weeks,
the
batteries
should
be
removed
and
stored
separately.
7.0
CORRECTIVE
MAINTENANCE
7.1
tools
required
Two
tools
are
required
to
disassemble
the
instrument
partially
for
minor
maintenance:
A
1⁄2
”
nut
driver
for
the
switch
and
zero
control
nuts,
and
a
3⁄4”
nut
driver
to
remove
the
high-meg
compartment.
For
complete
maintenance,
the
following
should
be
available:
.
A
X”
nut
driver
for
the
meter
terminals.
.
A
small
Phillips
screwdriver
for
the
screws
that
mount
the
meter,
.
A
20.000
ohm
per
volt
multimeter
such
as
the
Simpson
260.
.
A
small
soldering
iron
and
solder.
.
A
pair
of
diagonal
cutters
and
small
long-nose
pliers.
ES
7.2
disassembly
The
instrument
may
be
partially
or
completely
disassembled
in
the
follow-
ing
steps:
a.
Remove
the
toggle
clamps
and
the
lower
case.
Pull
off
the
switch
knob
and
remove
the
nut
holding
the
switch.
DO
NOT
LOOSEN
ANY
SCREWS.
b.
Hold
the
handle
and
press
down
on
the
switch
shaft
to
remove
the
chassis
from
the
upper
case.
c.
Place
the
chassis
in
the
lower
casc
to
hold
the
batteries
in
position
and
place
the
upper
case
next
to
it
as
shown
in
figure
3.
The
instrument
is
now
sufficiently
disassembled
to
make
voltage
checks
and
inspect
some
of
the
components.
Place
the
instrument
with
the
ionization
chamber
on
the
left
and
all
circuit
components
will
be
located
as
shown
in
the
circuit
diagram
figure
4.
To
remove
the
high-meg
housing.
remove
the
two
small
nuts
on
the
switch
mechanism,
lift
out
the
switch
mechanism
and
remove
the
two
spacers
below
it.
Now
lift
off
the
high-meg
housing.
NOTE:
Because
the
electrometer
tube
is
sensitive
to
light,
the
instrument.
will
not
measure
radiation
accurately
when
the
high-meg
housing
is
open.
8.
To
re-assemble
the
instrument.
follow
the
above
steps
in
the
reverse
order.
When
replacing
the
switch
mechanism,
be
sure
the
switch
rotor
js
in
the
position
that
it
was
in
when
the
switch
mechanism
was
removed.
7.3
calibration
A
calibrated
source
of
radioactive
material
should
be
used
to
calibrate
the
instrument,
Cobalt-60
and
Radium
sources
are
most
commonly
used.
If
the
radiation
intensity
of
the
source
is
unknown,
a
secondary
standard
instru-
ment
such
as
a
Condenser
R
Meter
can
be
used
to
calibrate
the
source.
The
Jordan
710-4
can
be
calibrated
on
any
of
its
three
ranges
and
the
other
two
will
automatically
be
calibrated.
A
convenient
radiation
intensity
to
usc
is
0,35
r/hr.
A
20
mc.
Radium
source
will
produce
this
intensity
at
8.62
inches.
All
measurements
must
bc
made
from
the
center
line
of
the
cham-
ber,
the
location
of
which
is
indicated
by
a
small
raised
line
on
each
side
of
the
lower
case.
The
source
should
be
no
closer
than
6
inches
from
this
mark.
Prior
to
recalibrating
the
instrument,
install
a
new
set
of
batteries.
Set
the
range
switch
to
the
ZERO
position,
turn
the
ZERO
control
clockwise
to
the
stop
and
adjust
the
COARSE
ZERO
control
to
make
the
meter
read
0.4.
Re-zero
the
instrument
with
the
ZERO
control.
Check
the
calibration
with
the
instrument
in
the
casc.
Remove
the
instru-
ment
and
adjust
the
CALIBRATE
control
as
required.
Replace
the
instru-
ment
in
the
case
and
check
the
reading.
Repeat
this
procedure
until
the
correct
reading
is
obtained.
If
a
large
source
is
available,
thc
high
ranges
should
also
be
checked.
7.4
batteries
The
"B"
battery
and
"D"
cells
are
tested
by
usc
of
the
circuit
check
feature.
If
trouble
occurs,
however,
the
batteries
should
be
tested
separately
with
a
voltmeter.
The
voltages
should
be
as
follows:
After
N
200
Hours
B,
1.55V
1.25V
B.
1.55V
1.55V
B,
23V
15V
7.5
trouble
shooting
Seven
of
the
eight
significant
voltages
in
the
circuit
can
be
measured
by
removing
only
the
lower
case.
Voltages
can
be
measured
(rom
the
chassis
to
cach
of
the
battery
contacts.
The
plate
of
the
electrometer
tube
is
con-
nected
to
the
small
washer
under
the
center
of
B,.
Measurements
can
be
made
at
this
point
by
moving
By
its
contacts
about
14”
to
the
back
of
the
instrument,
It
is
recommended
that
these
measurements
be
made
before
the
instrument
is
disassembled
for
further trouble
shooting.
All
components
with
the
exception
of
the
high-meg
resistors
and
the
elec-
trometer
tube
are
similar
to
parts
used
in
radio
and
television
sets
and
most
radio
servicemen
and
radio
amateurs
can
test
them.
Voltages
can
he
checked
with
those
shown
on
the
circuit
diagram.
Batteries
must
be
removed
before
making
resistance
or
continuity
checks.
The
high-meg
resistors
cannot
be
checked
with
standard
radio
test
equip-
ment
but
can
be
assumed
to
be
functioning
properly
if
they
are
not
dirty
or
damaged.
CAUTION:
Do
not
handle
the
high-meg
resistors,
the
ceramic
switch
deck,
or
the
electrometer
tube,
Touch
them
only
with
clean
tools.
Do
not
unsolder
the
red
wire
from
the
shell
connection
of
the
ionization
chamber.
This
will
destroy
the
hermetic
seal.
Disconnect
the
other
end
of
this
wire
if
necessary.
The
following
symptoms
and
suggested
corrective
procedures
will
bc
helpful
in
trouble
shooting
the
Jordan
710-4.
LEA
A————
I
not
zero
CORRECTIVE
PROCFDURE
Dead
batteries
Replace
all
batteries
Dirty
battery
contact
Inspect
and
clean
battery
contacts
Loose
battery
contact
Check
contact
pressure
and
squeeze
battery
contacts
together
to
increase
pressure
if
necessary
Coarse
zero
control
Readjust
according
to
instructions
in
disturbed
section
7.3
Electrometer
tube
Remove
batteries,
set
range
switch
to
filament
open
ZERO.
measure
resistance
between
battery
contacts.
Should
be
approximately
150!
Open
potentiometer
Check
potentiometers
with
ohmmeter
Open
resistor
Check
resistors
with
ohmmeter
Open
connection
Inspect
all
solder
joints
and
wiring
Open
switch
contact
Check
switch
contacts,
clean
and.
if
necessary.
adjust
contacts
Short
circuit
Inspect
tor
mechanical
damage
10
-
no
reading
Dead
batteries
Dirty
battery
contact
Loose
battery
contact
Meter
damaged
Open
connection
reads
low
Calibration
control
disturbed
Calibration
control
open
Dead
electrometer
Dirty
high-meg
components
Meter
damaged
reads
high
Calibration
control
improperly
adjusted
If
high
reading
is
on
only
one
range.
a
high-meg
resistor
may
be
damaged.
CORRECTIVE
PROCEDURE
Replace
batteries
Inspect
and
clean
battery
contacts
Check
contact
pressure
and
squeeze
battery
contacts
together
to
increase
pressure
if
necessary.
Replace
meter
Inspect
all
solder
joints
and
wiring
Check
calibration
as
outlined
in
7.3
Check
calibration
control
with
ohmmeter
Replace
with
new
S886
Clean
the
high-meg
resistors,
ceramic
deck,
electrometer
tube,
and
chamber
insulator
with
pure
dry
alcohol
Replace
meter
Check
calibration
as
outlined
in
7.3
Replace
suspect
high-meg
resistor
e
3/16"
NUT.
HOUSING
1/2:
NUT
DRIVER
zero
CONTROL
ELECTROMETER
—
mo
mec
TUBE
RESISTOR:
swrtcn
DECK
Figure
3—
The
Jordan
710-4
Disassembled
for
Servicing
8.0
REPLACEABLE
PARTS
8.1
mechanical
components
M
e
10000
Jordan
No.
Req'd
Description
and
Function
Part
No.
1
Case
assembly,
upper.
. . .
.
.
. .
AP-0006
1
Case
assembly,
lower
.
. .
. . . . .
AP-0005
1
Knob
assembly,
switch.
. . . .
.
AP-0010
1
Knob,
zero.
.
. . .
. .
. . .
.
MP-0016
2
Clamp,
toggle.
. . . .
.
. . .
.
AA-0001
1
Shield,
high-meg
.
. .
.
.
.
.
.
M820255
1
Gasket
case
.
.
.
. .
.
. . . .
HG-0039
1
Gasket,
meter.
. .
. .
.
.
. . .
HG-0043
1
Strap
assembly,
shoulder
. .
. .
. .
.
AP-0011
12-
8.2
maintenance
supply
parts
Suggested
supply
for
five
instruments
for
one
year
of
operation:
RARE
Circuit.
Jordan
Qu.
Symbol
Description
and
Function
Part
No.
5
B,
"D"
cell,
filament
supply
.
BA-0005
5
Ba
“D"
cell,
bias
supply
.
BA-0005
5
Ba
`B"
battery,
plate
supply
.
BA-0006
1
VT
Vacuum
tube,
electrometer,
5886
VT-5886
1
M
Meter.
indicating
.
VA
EL0013
1
R,
Resistor.
high-meg.
Range
X-1
RX-0007
1
R.
Resistor,
high-meg.
Range
X-10
.
=.
RX-0008
1
Ra
Resistor,
high-meg.
Range
X-1000
.
RX-0009
1
R;
Potentiometer,
zero
control
. .
RP-0103
i
|
s.
AP-0006
1
AP-0005
1
AP-0010
1
Knob,
zero
0.
s s
16
MP-0016
2
Clamp.
toggle
.
E
tes
Ww
AA-0001
8.3
names
and
addresses
of
manufacturers
———M——————
I
NATIONAL
CARBON
Co.
30
Fast
42nd
Street
New
York
17.
N.
Y.
RESISTANCE
PRODUCTS
COMPANY
914
South
13th
Street
Harrisburg,
Pennsylvania
INTERNATIONAL
RESISTANCE
Co.
401
North
Broad
Street
Philadelphia,
Pennsylvania
CENTRALAB
900
E.
K
Ave.
Milwaukee
1,
Wisconsin
PR.
MAaLLORY
&
Co.,
Inc.
3029
E.
Washington
Indianapolis
6,
Indiana
PHAOSTRON
INSTRUMENT
AND
ELECTRONIC
Co.
151
Pasadena
Ave
South
Pasadena,
California
143
`
FI
Resistors
+
10%.
Controls
"20%
unless
otherwise
noted.
Voltages
shown
are
nominal
and
arc
measured
from
the
Switch
shown
in
OFF
position.
chassis
with
a
20,000
ohms
per
volt
meter
set
to
the
lowest
Shaded
terminali
available
inside
lower
case.
practical
range.
Set
switch
to
ZERO
position.
Figure
4
—
Wiring
Diagram
8.4
electrical
components
I———————————————
R--JJo———'
e,
Circuit
Mirs
Jordan
Symbol
Description
and
Function
Manufacturer
Type
No.
=
Part
No.
B,
1.5V
"D"
cell,
filament
supply
National
Carbon
Co.
950
BA-0005
B.
15V
"D"
cell
bias
supply
.
. .
.
National
Carbon
Co.
950
BA-0005
B,
22.5V
"B^
battery,
plate
supply
A
es
Jordan
J-15
BA-0006
Ri
Resistor,
high-meg
160,000
meg
10%,
Range
X-1
RPC
BBF
RX-0007
Ra
Resistor,
high-meg
16,000
meg
10%
,
Range
X-10
RPC
HBF
RX-0008
R;
Resistor,
high-meg
1.600
meg
10%,
Range
X-100
RPC HBF
RX-0009
R,
Resistor,
carbon
1.5K
5%
12W
circuit
check
IRC
BTS
RC-0152C
R;
Resistor,
carbon
11K
5%
14W
bias.
.
.
.
IRC
BTS
RC-0113C
Ry
Resistor,
carbon
47K
10%
W
shunt.
.
.
.
.
IRC
BTS
RC-0473
R;
Potentiometer,
carbon
10K
20%
12W
zero
control
Centralab-
Model
2
.
RP-0103
Ry
Resistor,
carbon
12K
10%
13
W
plate
load
.
IRC BTS
RC-0123
Ry
Potentiometer,
carbon
100K
20%
1⁄2
W
calibrate
adj.
Ri
Potentiometer,
carbon
100K
20%
13W
coarse
zero
adj,
|
|
Malory
EC!
y.
enu
Ru
Resistor.
carbon
18K
1072
v^
W
plate
dropping
.
IRC
BTS
RC-0183
CG
tonization
chamber
ussembly
Jordan
AE-0026
M
Meter,
indicating
20
a
30000
Phaostron
220
El-0013
vr
Vacuum
tube,
electrometer,
5886
Raytheon
5886
VT-5886
XA
Switch
deck,
ceramic,
range
switch...
Jordan
SD-0019
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