Eico 667 - GENERAL DESCRIPTION; EICO Model 667 Tester Overview; SPECIFICATIONS; Operating Requirements

667 TUBE
TESTER
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GENERAL
DESCRIPTION
The
EICO
Model
667
Dynamic
Conductance
Tube
& Transistor
Tester
is one
of
the
first
thoroughly
practical
service
instruments
able
to
test
both
tubes
and
transistors.
Among
its
advantages
are
rapid
and simple
operation,
close
simulation
of
actual
tube
operating
conditions,
and
unexcelled
thoroughness
and
accuracy
of
test.
The
outstanding
mechanical
design
and
layout,
coupled
with
components
carefully
selected
for
ruggedness,
makes
the
Model
667 extremely
well-suited
for
the hard
usage
of
daily
service
work.
All
components
of
the Model
667
tube
tester
are
assembled
to
the
heavy-gauge
aluminum
front
panel,
which
is in
turn
top-mounted
by
14
screws
to
flanges
on
all
four
sides
of the
steel
case. A
detachable
steel
cover
is
mounted
to
the
back
of the
case
with
separable
hinges
so that
the
cover
may easily
be removed
for
use
of
the
instrument
as a
counter
-top
model
or
replaced
to
convert
it
back to a
portable
instrument.
There
are ten
different
tube
sockets
on
the
panel
to
accomodate
modern
receiving
and
other
tube types
(see Types
Tested
below).
In addition,
pilot
and
Christmas
tree
lamps
can
be
checked
rapidly
using the
center
of the
Novar
socket. A
special
transistor
socket
accomodates
both
n-p-n
and p-n-p
transistors.
To
protect
against
damage
due
to
current
overload,
a
type
3AG
1
ampere
fuse
is
connected
in
series
with
the
primary
of the
power
transformer.
SPECIFICATIONS
LINE
VOLTAGE
&
FREQUENCY:
105-
130V,
60
cycles.
Note:
Do
not
connect
to a
dc
line.
POWER
CONSUMPTION:
10
watts
with
no
tube/
transistor
under
test; 50
watts
at maximum
load.
T
YPES TESTED:
5
&
7pin
Nuvistors;
Novars;
Compactrons;
7,9,
&
lOpin
miniatures;
5,
6
& 7
pin
sub-miniatures
(in-line
base);
8-pin
sub-miniatures
(circular
base);
octal;
loctal.
In addition
to receiving
types,
both
domestic
and
foreign,
many
small
transmitting
and
special-purpose
tubes,
voltage
regulators,
cold
cathode
rectifiers,
electron-ray
indicators,
and
ballast
tubes
are
tested.
Tests
n-p-n
and p-n-p
transistors.
Pilot
lamps
are
tested
in center
of
Novar
socket.
Accessory
Model
CRU
adaptor
for
testing
all
color
and
black
and
white
picture
tubes.
TUBE
TESTS:
a)
Direct-reading
of
inter-element
and
cathode
heater
leakage
in
ohms
on
a 0 to
20
megohms
scale.
DC test voltage
always
applied
in correct
polarity
to elimi-
nate
emission
effects
from
reading,
b) Merit
test,
which
is
an
emission
reading
for
diodes and
rectifiers
and a
dynamic
conductance
(combined
plate
conductance,
mutual
conductance,
and
emission)
reading
for
triodes,
tetrodes,
andpentrodes.
TRANSISTOR
TESTS:
N-p-n
and
p-n-p
types.
TRANSISTOR
TESTS:
a) Leakage
measurement
of
collector
current
with
emitter
grounded
and
no
base
signal,
b)
Direct
reading
of current
amplification
factor or
Beta
(change
in
collector
current
caused
by change
in
base
current.
ACCURACY
OF LINE
VOLTAGE
INDICATION:
±3%
SIZE:
12"
x
15"
x
6"
WEIGHT: 20
lbs.