Circuit
Description
—Type
575
load resistor.
The
voltage
at
the
common
plate
swings
be
tween
the
plate-supply
voltage
and
ground
because
the
volt
age
at
the
input
grids drive the
tubes from
below
cutoff
to
saturation.
The
frequency
of
these pulses is
240
per
second
(or
4
times
power-line
frequency).
The
first
negative-going
pulse
is
extra
wide
because
the
pulse
generator
is
disabled
by
the
clamping
action
of
V163B
during
the
time
V155B
is
cut
off.
A
cathode follower
(V143A) provides
a
low-impedance
output.
The
upper
limit
of
the
pulses
appearing at
the
cathode
of
V143A,
determined
by
the
setting
of
the
VOLTS/STEP
ADJ,
is
150
volts.
The
lower
limit,
determined by
R142/R143
is
50
volts.
Each
negative-going
pulse applied
to
the
left
side of
C142
causes
C142
to
partially discharge
into
C177.
C142
recharges
through
diode V172B
as
the input
pulse
returns
to
150
volts.
The
voltage
across
Cl
77
increases
15
volts
with
each
transfer
of
charge.
The
action
of
the
Miller
integrating
circuit
causes
this
voltage
increase
to
appear
at
the
top
of
Cl
77.
The
volt
age
at
the
bottom
of
C177
remains
almost
constant.
Between
pulses, C177
has
no
discharge
path
and
the
volt
age
at
the
output
of
the
Step Generator
remains
constant.
After
the
trigger has
reverted
to
its
initial
state
(V155B
con
ducting), V163B and
V152B
no
longer
conduct
and
another
staircase
waveform
is
generated
in
response
to
the
pulses
applied
to
the
left
of
Cl
42.
Fig.
3-7
illustrates
the sequence
of
events
occuring
in
the
generation
of
a
staircase
waveform.
Voltages
shown
are
approximate.
Step Amplifier
The
voltage
gain
of
the
Step
Amplifier
is
less
than
one,
but
the
current
gain
is several
thousand.
The
functions
of
the
Step
Amplifier
are
as
follows:
1.
It
permits selection
of
the
size
of
the
output
steps
(cur
rent or
voltage).
3-5
Содержание 175
Страница 4: ...VWTICM OINltAlO TRANSISTOR CUM TRACfR UB l COUlClO r hokizoniai VCKIJ O lUnK Hix M Type 575 z ...
Страница 6: ...NOTES ...
Страница 26: ...NOTES ...
Страница 48: ...NOTES ...
Страница 54: ...Recalibration Type 575 C706 Fig 5 3 Left Side View 5 6 ...
Страница 56: ...NOTES ...
Страница 61: ...O I Ui Fig 6 6 Simplified circuit diagram of Type 175 Transistor Curve Tracer High Current A dapter ...
Страница 100: ...INPUT AMPLIF1E ...
Страница 104: ...TYPE 575 TRANSISTOR CURVE TRACER ...
Страница 108: ...OSCILLATOR 4OOV UNREG TYPE 575 TRAN5I5TOR CURVE TRACER AB ...
Страница 114: ...234 VAC 117 VAC PRIMARY CONNECTIONS FOR 234VOLT OPERATION ___I TYPE 175 TRANSISTOR CURVE TRACER HIGH CURRENT ADAPTOR ...
Страница 115: ... 300 ...
Страница 117: ...TYPE 175 TENT S N 393 PARTS LIST CORRECTION CHANGE TO SW510 TRANSISTOR SELECTOR 260 636 M6983 664 ...
Страница 119: ...Type 175 Tent S N 570 PARTS LIST CORRECTION Change to Q233 151 0137 00 2N21U8 MIO 298 1165 ...
Страница 123: ...INSTRUCTIONS cont uu y uj r uu y P 2AO MJ i DfeZOC 4K cx zdd uu gn UJ bK uj bn T JU O Page 4 of 4 040 0223 00 ...
