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On-line curator: Glenn Robb
DC to 1 , 0 0 0 NIC,
Measuring ease f o r nanosecond region
Bright, clear 5" scope trace, even at low repetition rates
.Less than 0.4 nanosecond rise time
Here's fatigue-free viewing of repetitive short pulses requiring a bandwidth up to 1,000
MC. With the @ 185B Sampling Oscilloscope and 187B plug-in amplifier, the 3 db
point is beyond 800 MC, rise time less than 0.4 nsec. @ 187B Dual Trace Amplifier per-
mits comparison of two high-speed phenomena simultaneously for highly accurate time
measurements. Vertical sensitivity 10 mv/cm to 200 mv/cm, vernier to 4 mv/cm. Dy-
namic range, 4 mv to 2 v peak. 100,000 ohm probes minimize circuit loading. Horizontal
sweep 0.1 nsec/cm (with expander, 0.04 ns/cm with vernier) to 10 psec/cm. Delayed
sync pulse available on front panel for triggering circuits under test. X - Y recorder output,
time and amplitude calibrators, beam finder. @ 185B, $2,300.00; @ 187B, $1,000.00.
@ l 8 5 B with 1878
@ 185s Oscilloscope Accessories tor Maximum Flexibility
Overall versatility of the 185B Oscilloscope and 187B Dual Trace New Switching Time Tester
Amplifier is increased with a wide variety of accessories. In ad-
dition to the 185B-21A Sync Probe furnished with the scope, 4 re-
sistive divider probes are available: 185A-21C, D , E, and F have
division ratios (when terminated by 50 ohms) of 5,10, 50 and 100
to 1 respectively, $40.00 each. Two @ 187A-76A BNC Adapters, 0 186A Switching
furnished with the 187B, permit connection to BNC fittings. Time Tester, really
@ 187A-76B Type N Connector is a straight-through connection, four instruments in
$10.00. @187B-76C 10:1 Divider permits viewing of signals as one, plugs into @ 185
large as 20 v peak-to-peak, $40.00. @ 187A-76D Blocking Cap- oscilloscopes and
acitor permits observation of signals +- 600 v from ground, $3.50. makes rapid measure-
0187B-76E 50-ohm T Connector permits scope probe to monitor ments with nano-
signal on a 50-ohm transmission line, may be used with a 50-0hm second resolution of
load to terminate the line in its characteristic impedance while transistor, diode and tunnel diode switching characteristics Also pro-
observing the signal with the scope, $40.00. @ 187B-76G Probe vides convenient means of testing pulse response of high speed circuits.
Socket, $2.00. @ Model 11OOA Delay Line, $300.00, bandpass @ 186A comprises a 1 ns rise time pulse generator, single channel verti-
1 GC, delay 120 ns, permits 185B scope to be synchronized from cal amplifier and two power supplies for biasing components under test.
signal to be viewed, includes 1lOOA Delay Line, 1100A-76A Three plug-in jigs are supplied for testing transistors, diodes, tunnel
Delay Line Load, 185A-76A Sync Take-off and llOOA-16A Sync diodes. Universal jig for testing external networks available. @ 186A,
Cable. $1,500 00.
Or Meet Your Requirements With These Other
.-
4 1 0 DC t o 450 KC
3 2 8
@ 130B,BR combine big scope performance Models 122A,AR are dual trace, 200 KC
with 1 mv sensitivity and the convenience of oscilloscopes providing two separate traces
"universal" automatic trigger. Models 130B/ for simultaneous study; single trace when New @ 120B incorporates no-parallax in-
BR have similar horizontal and vertical am- desired. Twin vertical amplifiers, alternate ternal graticule for greater accuracy, new
plifiers with sensitivity 1 mv/cm to 125 v/ and chopped presentation, differential input, non-reflecting CRT face. 1 5 calibrated
cm. Input circuits balanced on 6 most sensi- automatic syncing and x5 sweep expansion. sweeps, 5 psec/cm to 200 msec/cm, vernier
tive ranges; sweeps 1 psedcm to 12.5 s e d - 15 calibrated sweeps; vernier extends slow I
cm, triggers from signal, line or external sweep to 0.5 sec/cm, expander extends fast extends sweep range 1 psec/cm to 0.5 sec/
voltage. Includes x5 magnifier for all internal
sweeps increasing fastest sweep time to 0.2
sweep to 1 psec/cm. Sensitivity 10 mv/cm
to 100 v/cm. Horizontal amplifier sensitivity
cm. Times-5 sweep expander, automatic trig-
gering. Today's most convenient, versatile T
Psec/cm. @ 130B (cabinet) or 130BR 0.1 v/cm to 100 v/cm. @ 122A (cabinet) or 450 KC scope. @ 120B, modular cabinet for
(rack mount) $650.00. 122AR (rack mount), $675.00. bench or rack use. $475.00.
Data .rubjrct t o change without notice. Prires f.0.b. farrory.
2
New @ 175A Universal Oscilloscope
5 0 MC main vertical amplifier
Dual trace and high sensitivity plug-ins
Bright, 6 x 10 cm display with no parallax, reflection
or astigmatism
Horizontal and vertical plug-ins for specific applications
Easier t o calibrate and maintain-no distributed amplifiers
Preset trigger automatic over entire bandwidth
@ 175A Universal Oscilloscope with dual fied circuitry for more reliable performance
trace vertical amplifier gives bandwidth and easy maintenance. Only 7 tube types
greater than 40 MC with no sacrifice in sensi- and 5 transistor types are used throughout.
tivity. Three vertical and four horizontal @ 175A Universal Oscilloscope is housed in
plug-in units, including sweep delay give the new @ modular cabinet . . . a single
the @ 175A the greatest versatility ever instrument for both bench and rack mount.
offered in a general purpose 50 MC scope. Internal sweep: 24 calibrated ranges, 0.1
psec/cm to 5 sec/cm, f 3%'. Vernier pro- @ I75A Universal Oscilloscope with @ I750A
The @-developed 1 2 Kv CRT provides a 6 vides continuous adjustment between cali- Dual Trace Vertical Amplifier and @ 1780A
cm x 10 cm display area without distortion brated ranges and extends slowest sweep to Plug-In.
or defocusing. Phosphor and graticule are on 15 sec/cm. Times-10 magnifier. Horizontal
the same plane-thus eliminating parallax amplifier passband, dc to 500 KC. @ 175A,
error. In addition, @ 175A features simpli- $1,325.00.
Vertical and horizontal plug-ins tailor the 175A to a
wide variety o applications
f
@ 1750A 40 MC Dual @ 1753A 40 MC Single @ 1752A 5 mv High @ 1783A Time Mark @ 1781A Delay Gener-
Trace Vertical Amplifier, Channel Vertical Ampli- Gain Vertical Amplifier, Generator, $130.00 ator, $375.00
$285.00 fier, $155.00 $225.00
Pictured in @ 175A above, @ 1780A Auxiliary Plug-In for normal or single sweep operation, $25.00
Bench-Proven @I Oscilloscopes, Accessories .
'
--
@196B
Oscilloscope @
' AC-I 15B O s c i l l o -
scope Testmobile for
Camera @ scopes. 4" rubber
A black-light with- tired wheels, heavy
in the l96B causes chrome tube construc-
CRT phosphor tion, tilts scope to 30"
170A
with plug-ins (except P I ) to in 795' increments,
glow softly, pre- folds for storage, ship-
sensitizing film as ping. $85.00.
@160B,@ 7 7 0 A
DC t o 15 MC; DC t o 30 MC
-- picture is taken and
increasing writing @ AC-2 I series probes
rate. Soft glow al- available for use with
@ IGOB, dc to 15 MC, and @ 170A, dc so illuminates graticule of @ no-parallax @ scopes include AC-
to 30 MC, are militarized oscilloscopes offer- internal graticule CRTs. f/-1.9 lens, 1/100
ing rugged dependability under a wide range 21A, 1 0 : 1 division,
to 1 sec shutter (plus T & B ) , controls ac-
of environmental conditions. Seven X and Y cessible with camera mounted. Fixed back, $30.00; AC-ZIC, 50:l
axis plug-ins (similar to 1750 and 1780 detented moving lens simplifies making mul- division, $30.00; @
series above) increase versatility. 24 cali- tiple exposures. View screen with both eyes AC-21F Current
brated sweep times, seven step (to x 100) while exposing (no parallax with- @ I G Probe, 1 mv/ma,
magnifier. @ 16OB, $2,050.00 (cabinet or osiilloscopes) . Polaroid@ Land Camera back. $100.00; @ AC-21J
rack mount); @ 170A, $2,150.00 (cabinet @ l96B, $490.00; @ 196A (without black- Low Frequency Probe,
or rack mount). light source, $440.00. $9.CO.
D n t n subject t o change u,i/hout notice. Pricps f.0.h. factory.
3
Hewlett-Packard now offers 14 high quality, fast
instrument Frequency Range output Price
and accurate oscillators, each an exceptional value
and engineered to do a specific job best. Each 20 cps to 40 KC I waW4.5 v 1 $165.00.
incorporates the famous resistance-capacity circuit
pioneered by (8. This circuit makes possible wide audio and ultrasonic tests 5 CPS to 600 KC 1 160 mw or I O v/600 ohms;
20 v open circuit
I ,95,00,, I
range, compact instruments which are highly
stable, instruments that are extremely simple to 6 c p s t o 6 KC I 160 mw/lOv I 350.00. I
operate and require no tedious resetting or adjust-
ment during operation. 5 cps to 600 KC 3 v rms into 50 ohms 230.00.
250 cps to 100 KC I6O ~ ~ ~ ~ d ~ ~ { ~ ~ ~ u ~ 500.00.
N e w Pushbutton 1 MC 20 cps to 20 KC 3 w or 42.5 v/600 ohms 250.00.
OsciIlator 0.008 to 1200 cps 28 mw Or 30 p-p/4000 550.00A
ohms
1 -hp- 202c 1 Servo equipment tests,
measurements I cps to 100 KC I60 mw or IO v/600 ohms 300.00.
I -hp-204B I Reliable audio work in l a b
or field, battery powered
5 cps to 500 KC I IO mw (2.5 v rms) into
600 ohms: 5 v rms open
circuit
1 275.00 I
$
13 u b
241A with
41 ti t t on fre- 1 -hp- 205AG I High power audio tests,
aain measurements 20 cps to 20 KC 5 watts 600.00A
quency control,
p v c \ thrcc digit
rcsolution in
\election of fre- 50 cps to 500 KC 3 w/600 ohms 650.00
quencies, yet pro-
vides utmost simplicity of operation. Ideal for IO cps to I MC 4- lodbm/600 Ohms; 425.00
situations where several preset frequencies are
required quickly and accurately. Frequency cover- -hD- 650A W i d e range video tests 10 cps to IO MC 15 mw/3 v 550.00A
age is 10 cps to 1 MC with vernier; frequency
response is flat within f 2% into rated load. (8
A Rack mounted instruments $15.00 less. Rack mounted, $5.00 more.
241A, $425.00.
@ 2 0 2 A Function Generator
(3 2 0 4 B
$
Multi-purpose source of transient-free test volt-
Portable ages from 0.008 cps to 1,200 cps. Continuously
Osci Ilato r variable through 5 bands; offers exceptional sta-
bility (within 1 % ) and distortion less than 1%
Use it on the bench- to 100 cps. Sine, square or triangular waves may
carry it anywhere! This be selected by a front panel switch; the 30 volt
portable oscillator is peak-to-peak output is constant for all wave
fully transistorized, bat- forms and over full frequency range. @ 202A,
tery or optional ac oper- $550.00A.
ation. Internal heat is
small; warmup drift is
negligible. O u t p u t is
fully floating, isolated ($3 6 5 0 A Test Oscillator
from both power line
ground and chassis. Low impedance circuits drive Covering 10 cps to 10 MC, @ 65OA is a highly
the 600-ohm output, effectively isolating the oscil- stable, wide band in&ument for audio, ultra
lator stage; 204B maintains excellent frequency sonic, video and rf measurements. Output is flat -
stability even with rapidly changing loads. Output within 1 db full range; voltage range is 0.00003
is flat within +- 3% at all settings of dial and range to 3 v. In addition to 600-ohm impedance, volt-
switch Designed in the new @ instrument module age divider provides a 6-ohm impedance. Dis-
packaging, @ 204B, with batteries, $275.00; AC tortion less than 1% to 100 KC. $550.00A.
operation in lieu of batteries, add $25.00 .
@ 200AB ($3 201C Audio @ 202c
@ 2 0 0 C D Audio Oscillator Audio Oscillator Osci I Iato r Low Frequency
Osc iI Iat0 r
This wide range oscillator, Useful for audio tests, the This high power oscillator
5 cps to 600 KC, spans versatile @ 200AB Oscillator offers an output of 3 watts or Providing excellent waveform
the range from subsonic covers its range, 20 cps to 40 42.5 v into 600 ohms over the throughout its broad frequen-
to radio frequencies, cov- KC, in f o u r overlapping
frequency range 20 cps to 20 cy range, 1 cps to 100 KC, the
ered in five overlapping bands. Like the @ 200CD it
decade bands. Accurate has highest stability and ac- KC. Response is +- 1 db full @ 202C is especially conven-
frequency setting on the curate calibration. Low im- range. attenuator adiusts out-
Y l
ient for measurements in the
large easy-to-read dial is pedance operating levels plus put 0 to 40 db in lo'db steps, subsonic, audio and ultrasonic
provided by 85 dial divi- superior insulation guarantee provides either low imped- regions. Distortion less than
0.5%, hum voltage less than
sions. Distortion rating is long years of trouble-free
less than 0.5% below 500 dependability. Operation is ance or constant 600-ohm in)- o,lvo, short recovery time ?
KC. O u t p u t waveform simple; just three controls; pedance. @ 201C, $250.00. < 5 sec at 1 cps. @ 202c,
purity is independent of no zero setting necessary. @ (cabinet), @ 201CR, $255.00 $300.00 (cabinet), @ 202-
load. @ 200CD, $195.00. 200AB, $165.00. (rack mount). CR, $305.00 (rack mount).
Data subject t o change without notice. Prices f.0.b. factory.
4
I @ 3 0 2 A Wave Analyzer
20 cps to 20 KC
20 cps t o 20 KC
A Rack mounted instruments $15.00 less.
Completely transistorized, advanced instrument @ 2 9 7 A Sweep Drive
provides direct, accurate wave component meas- ($3 297A motor accessory converts @ to a sweep
302.4
I
urement without calibration or stabilization. Rela- oscillator-tuned voltmeter for automatic frequency response
tive or absolute measurements from 20 cps to 50 measurements. Mounts on 302A or adjustable bench stand.
KC, hum free, needs no warmup, very sharp ac- Sweeps all or any part of the 302A range automatically;
has fast sweep for covering frequency spectrum rapidly,
ceptance circuits plus AFC. May be battery oper- slow sweep for high resolution plot. X-axis output for X - Y
ated (18 to 28 volts). $I,soo.oOA. plot. @ 297A $350.00.
Pulse, Square Wave and Digital Delay Generators
@ 218AR Digital Delay Generator @ 211A Square Wave Generator
@ 218AR is ideally suited for Here is a versatile, wide-range instrument espe-
pulse simulation and time cially designed for testing video and audio ampli-
measurement in radar, loran, fiers, networks and oscilloscopes, for modulating
signal generators and measuring time constants,
pulse code systems, etc. Suit- 1 cps to 1 MC. Two separate outputs: 3.5 v peak
able for military use, it pro- into 75-ohm impedance circuit for TV measure-
vides two precision time inter- ment, and 27 v peak into 600 ohms for high level
vals or pulse delays, independ- work @ 211A, $350.00 (cabinet); Q 211AR,
$355.00 (rack mount).
ently adjustable from 1 to
10,000 psec in 1-psec steps
when using the internal 1 MC @ 212A Pulse Generator
time base. Intervals may be Popular @ 212A provides continu-
initiated either internally, 10 cps to 10 KC, or externally, 0 cps to 10 ously variable, high-power positive
or negative "fast pulses" of supe-
KC. Accuracy is f 0.1 psec *O.OOl% of the selected value; total rior wave form. Pulse lengths con-
jitter does not exceed 0.02 psec. Sync pulse, timing comb output pro- tinuously variable 0.07 to 10 psec,
vided. For maximum versatility and simplicity, output pulses are gener- has direct reading pulse length
ated in the ($3 219 series plug-in drawer units. @ 218AR, $2,000.00. contlcbl, provides pulses of 50
watts peak power. Especially uzc-
ful in radar, T V and nuclear work.
Plug-ins Increase Versatility of @ 218AR @ 212A, $600.00&
@ 219A Dual Trigger Unit. Supplies positive trigger pulses, 50 volts, 0.1
psec rise time from 50-ohm source. Pulse A at TOor TI as selected by @ 213A Pulse Generator
switch, Pulse B at Tz. $125.00.
Ideal for use with @ I85A/B
@ 2198 Dual Pulse Unit. Produces two high-power positive or negative 1,000 MC scopes, this general pur-
pulses, continuously adjustable from 0.2 to 5 psec and from 0 to 50 volts. pose generator provides a pulse
Leading edge can be set for start or end of selected time interval $490. combining very fast rise time (less
@ 219C Digital Pulse Duration Unit. Produces high-power output pulse than 0.5 ns) with low jitter, high
with digitally controlled delay and duration. Pulse available in both repetition rate (up to 100 KC with
polarities at once; continually adjustable from 0 to 1 5 volts from 90- positive or negative trigger pulses,
ohm source, 0 to 90 volts from 500-ohm source. $375.00. higher free run). $215.00.
@ 215A Pulse Generator
Today's only pulse generator combining 1 ns rise and decay time with convenience
of calibrated, continuous control over pulse length and delay. Syncs from signals up
to 100 MC. Pulse length 2 to 100 ns, attenuation 1 to 1 2 db. Particularly useful for
measuring switching and recovery time, etc. of diodes, transistors, logic circuits and
thin-film memory units. Provides at least 10 v pk. into 50 ohms. Price on request.
@ 350C/D Attenuators, 110 db attenuation in 1 db steps, 5 watts power capacity,
high accuracy; dc to 1 MC. @ 350C (500 ohm) or 350D (600 ohm), $110.00.
New @ modular cabinet, same size as 204B oscillator; rack adapter available.
Data swbject t o change without notice. Prices f.0.b. factory.
5
@ 405BR,CR Automatic
~~
Frequency or C u r r e n t
Voltage Input
nstrument P r i m a r y Uses Price
DC Digital Voltmeters Range Range -
W i d e range ac lo megohms
-hp- 400D measurements. I O cps t o 4 MC O . ~ ~ l r ~ 15 pf~ shunt
~ ~ 250.00A
H i g h sensitivity
-~
H i g h accuracy wide 10 megohms I25.00A
-hp- 400H range ac ,o cps to MC ;
:zlO
r;. v 15 pf shunt
measurements
Log voltages, linear 0.001 t o 300 v IO megohms 325.00C
-hp- 400L db measurements Io c p ~ MC I2 ranges 15 pf shunt
I
-
Battery-operated
portable: fast, accu- 0.001 t o 300 v 2 megohms 275.00
Automatic range and polarity selection give you -hp- 403A rate, hum-free ac I cps t o I MC I 2 ranges 40, 20 pf shunt
literally "touch and read" measuring convenience. measurements
Covers 0.001 v to 1,000 v, accuracy 2 0 . 2 % of 0.001 v t o 1,000 v
*
reading 1 count. Unique stability virtually elimi- -hp- 405
Direct voltage meas-
urement. Automatic
range, polarity
dc
(accuracy -t-O.2%
of reading 2 1
II megohms to d c See
left
nates jitter in the last digit. Floating input, analog- count)
to-digital conversion and, with the 405CR, digital Audio, rf, V H F dc--122 megohms;
recorder output. Front-panel switch to hold ranges. dc; ac-20 dc - I t o 1000 v; 245.00
Just 7" high. 405BR, $850.00; 405CR, $925.00.
-hp- 4106 measurements; dc
voltages; resistances cps 7oo MC ac - to 3oo ac-IO megohms/
1.5 p f
__
@ 4 5 7 A AC-to-DC Converter -hp-4IIA
Millivolt, d b readings
t o kilomegacycle
range
500 KC t o I G C ` o ~ a $ ~ ~ v ' - 450.001
Now you can Precision voltage,
make high ac- I mv t o 1,000 v IO t o 200 megohms. 400.00C
-lip- 412A current, resistance dc I pa t o I a m p depending on rangi
curacy ac meas- measurements -
urements to 500 dc null meter, I mv t o 1,000 v 10 t o 200 megohms
KC with a dc -hp- 413A dc voltmeter, dc 350.001
13 ranges depending on rang
digital voltmeter. amplifier
~~
With @ 405CR Read cy, ppa; 100 d b
amplifier. medical, dc voltages as I O PV t o 1 V I megohm 500.001
Digital Voltmeter and an @ 560 series Digital -hp- 42SA biological: physical, 100 d b amplifier I I ranges +- 3%
Recorder you obtain permanent records in printed chemical
digital form. Alternating current measurements
may also be made easily and accurately by adding -hp- 428A
Clip-on milliammeter
eliminates direct con- dc 3 ma t o I amp,
6 ranges
- 500.00/
an @ AC-21F Current Probe and an AC-67 iection, circuit loading - __
Termination, Ranging is accomplished by input Similar to 428A.
attenuation so that the dc output voltage is always
between 0 and 1 volt. Covers 0 to 300 v rms in 4
-hp- 4288
Hider range, recorder
output for dc t o
~ recorder~
on
I ma t o IO~
amps, 9 ranges
$ -~ ~
600.001 ~
decade ranges, 50 cps to 500 KC. Accuracy f
400 cps -
0.3% to 50 KC, 2 0.75% to 500 KC, *1 mv. -hp- 456A
measurements
on meters, scopes
60 cbs t o 4 M C I ma t o I amp rms - ___
190.00
Input impedance 1 megohm. @ 457A, $350.00. 0 t o 300 v rms I megohm
ac-to-dc 50 cps t o 350.00
-hp- 457A converter 500 KC 4 decade ranges 30 p f shunt __
@ 4 0 3 A Transistorized dc pos. or neg. Worksinto
I O megohms
to
-hp- 738AR Voltmeter calibrator 400 cps sine 300 p v t o 300 V 950.00
AC Voltmeter wave ~
-hp- 739AR
Frequency response
test set
300 KC (5 cps
with -hp- 2OOSR) 3 v output - 600.00
t o IO MC __
Current measurements (with 4 2 8 ~ 3 ma t o I a m p
DC I_
350.00
-hp- 3528P in large conductors I s
~ $ t ~ ~ \ \ ~ p ma t o I O amp __
DC (with 428A) 3 mgauss t o
-hp- 35291
Magnetic field I gauss __ 75.00
measurements DC t o 80 cps I mgauss t o
(with 4288) IO gauss
:t
A Rack mounted instruments $5.00 more.
--
Battery-operated, portable, weighs less than 5 Ibs.,
covers 1 cps to 1 MC, 100 pv to 300 v rms (max.
@ 4 5 6 A AC Current Probe
full-scale sensitivity 1 mv). Also reads db direct, Permits measurement of current on indicating
-72 to +52 db. Noise less than 3% of full scale meters such as @ 400 D/H/L or @ oscilloscopes.
(6% on lowest range). Accuracy &3"0 to 500 This current probe clamps mound wire under test,
KC, +- 570 to 1 MC. Input impedance 2 megohms. needs no physical connection, does not load circuit.
400 hours battery life, $275.00. Range 1 ma to 1.5 amps peak, accuracy * l % at 1
KC, response & 2 % , 100 cps to 3 MC, * 5 % , 60
@ 400D Vacuum Tube cps to 4 MC, -3 db at 25 cps and greater than 20
MC. Battery operated. $190.00. AC supply in lieu
Voltmeter of batteries, add $20.00. ($9 456A-21B 1OO:l
Moderately priced preci- Divider permits measurement of current up to 25
amps when used in conjunction with the ac current
sion vacuum tube volt-
probe, $32.00.
meter, offering high long-
term stability. Covers 1
mv to 300 v full scale, 12 @?
J 4608 Vacuum Tubevoltmeter
ranges, 10 cps to 4 MC. This all-purpose voltmeter covers 1 to 300 v full
Accuracy * 296, 20 cps scale, 20 cps to 700 MC, input capacity 1.5 pf, input
to 1 MC, input impedance impedance 10 megohms. Also 1 v to 1000 v dc with
10 megohms, $250.00& 122 megohms input resistance, or ohmmeter cover-
ing 0.2 ohms to 500 megohms. @ 410B $245.00
(cabiner), @ 410BR $265.00 (rack mount).
Data subject t o change withuut notice. Prices f . 0 . b . factory.
6
@ 411A 1 G C Millivoltmeter @ 413A D C Null Voltmeter @ 4 0 0 t i , L Vacuum Tube
Here's unique versatility in @ 413A is a null meter, dc Voltmeters
an rf voltmeter offering mil- voltmeter, amplifier in one
livolt sensitivity and two You get 1% accuracy
versatile instrument. As a with @ 400H, 1 mv to
easy-reading linear voltage voltmeter, measures 1 mv to
scales in 140-3 ratio. Range 300 v full scale, 12
1,000 v end scale, 13 ranges, ranges, 10 cps to 4 MC.
IO mv to 10 v full scale 27G accuracy and virtually
-
rms, 500 KC to 1 GC, US- Big 5" mirror scale. @
drift-free operation. Input 400L has logarithmic
able indications to 4 GC! impedance 10 to 200 meg-
Also, db scale from - 42 voltage scale, 5" linear
ss
to+ 33 db for gain
measurements. Five
ohms, depending on range.
Input isolation allows oper-
db scale, accuracy 2 %
of readina. Input im-
ation 500 v dc or 130 v ac pedance, lboth models,
@ probe tips in- from giound. As amplifier, gain 0.001 to
crease versatility. Galvanometer recorder 10 megohms. In the 400L range switching in
1,000 in 13 steps. Low noise, high ac re- 10 db levels plus the 1 2 db scale provides
output. @ photo-electric chopper gives jection. $350.00A.
noise-free, drift-free low voltage readings. the wide overlap desirable in decibel level
$450.00A. measurements. @ 400H/L, $325.00a.
@ 4 2 5 A DC @ 4 1 2 A Precision @ 4 2 8 A , B Clip-On
Microvolt-Am meter Volt - Ohm -Ammeter D C Mi I I iam meters
High sensitivity, high sta- A precision multi-purpose in- Radical approach to cur-
bility microvolt meter; end strument, the @ Model 412A rent measurements means
scale voltages of 10 /JV to 1 measures dc voltage. 1 millo- no breaking leads, no dc
v in 11 ranges. Also reads volt to 1,000 volts full scale, connections, no soldering.
currents of 10 ppa to 3 ma 3 ranges. Accuracy +- 1% "Current transformer"
in 18 steps, 1-3-10 sequence. 11 scale, all ranges. Meas- probe clamps around wire,
Accuracy 3% on all es currents 1 microampere measures by sampling
ranges. Drift is less than 1 ampere with f 29% ac- magnetic field around the
4 pv per day referred to curacy, full scale ( 1 3 wire. Measures dc current
input terminals. In- r a n g e s ) . As an ohm-
~
in the presence of strong
p i t impedance 1 meter, Model 412A ac. @ 428A covers 3 ma to 1 amp, 6 ranges;
megohm * 3% on
all voltage ranges. Also usable as a 100 db
meaTure5 0.02 ohms to 5,000 megohms.
Extremely low noise and drift. Instrument
@ 428B covers 1 ma to 10 amps, 9 ranges,
has recorder output to measure from dc
amplifier, up to 1 v out from signals as small also provides recorder output. 9 412A, to 400 cps. Accuracy -t 3%. @ 428A,
as 10 pv, ac rejection at least 3 db at 1 cps $400.00A. $>OO.OOA; @ 428B, $600.00A.
and 60 db at 60 cps and above. $500.00A.
New Probes for @ 4 2 8 A , B DC Current Meters
@ 3529A @ 3528A Clip-On
Magnetometer Probe Current Probe
Measure magnetic fields as low as Has 2-9/16" aperture for making
1 milligauss, ac fields, Earth's field; measurements on large cables,
place circuit components for mini- pipes or waveguides. Provides
mum magnetic interaction. Con- readings 3 ma to 1 amp with @
nects to @ 428A/B DC Current 428A, or 1 ma to 10 amps with @
Meters, reads mgauss as ma ob 428B. @ 3528~4, $350.00.
@ 428A/B. @ 3529~4,$75.00.
New @ FrequencyjTime Standard Systems, Components
- % 5 parts in 10lo/day aging rate! 1 part in 101Otypical
ghortterm stability!*
'`
120AR --
' ( t .*.e & New standards of spectral purity, accuracy, reliability!
" -. e e) I14BR Accuracy and extreme reliability are the outstand- and similar stations. A receiver and electronic
ing features of these @ frequency/time standard counter are used for vlf comparisons. Suitable for
1- 103AR systems, which include a frequency standard, fre-
quency divider and clock and a standby power
shipboard, mobile and field as well as laboratory
use, the transistorized systems are compact and
*r I *
I13BR
supply, in addition to a comparison device. A rugged. They are suitable for satellite navigation
"gt " receiver and an oscilloscope are used to make time systems, missile and satellite timing-tracking and
", comparisons with hf signals broadcast from WWV single sideband communications.
725AR
* a v e r a g e d over I sec intervals a n d u n d e r reasonably constant e n v i r o n m e n t a l conditions
@ 103AR, @ 104AR @ 114BR @ 113BR, @ 115BR @ 724BR,
Quartz Osci I lators Time Comparator Freq ue ncy 7 2 5 A R Standby
Aging rate, 5 parts in lO"/day; Used in conjunction with @
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