This is a list of electronic test equipment that I have used on my bench and recommend with descriptions and specifications.
HEWLETT-PACKARD 200CD Oscillator
DESCRIPTION: The Classic Audio Bench Oscillator. In production from the 50's until the '80s. A workhorse. Gobs of output.
SPECS: Frequency Response: 5 Hz to 600 kHz +/-1dB in 5 ranges, Output: Adjustable up to 160 mW (10 Volts RMS) into 600 ohms, Distortion: 0.2% 20 Hz to 200 kHz, 0.5% 5 to 20 Hz and 200 to 60 kHz, Weight: 22lbs, Dimensions: 7 3/8"W x 11 1/2"H x 14 3/8"D. Controls: Freq, (Freq vernier), Freq Range, Amplitude.
DESCRIPTION: Covers 20 Hz to 40 Khz in 4 overlapping bands. Accurate frequency setting provided by a large dial with 90 divisions and an effective lenght of 63 inches.; Provides 1 watt (24.5 Volts) into 600 ohms. Has balanced output.
Specifications: Frequency Response: 20 Hz to 40 kHz in 4 ranges, Calibration
Accuracy +/-2% Output: Adjustable up to 1W (24.5 Volts RMS) into 600 ohms,
Maximum Hum and Noise: 0.05% Distortion: 1% 20 Hz to 20 kHz, 2% 20 Hz to
40 kHz, Line Voltage and Power: 115 VAC +/-10%, 20 to 400 Hz, 80 Watts
Weight: 15 lbs, Dimensions: 7 1/2"W x 11 1/2"H x 12"D. Controls: Freq,
(Freq vernier), Freq Range, Amplitude.
SPECIFICATIONS: Frequency Range: 5 Hz to 1.2 MHz Number of Ranges: 6
Overlapping Dial Accuracy: +/-3% Flatness: +/- 1% or better Output Voltage:
>2.5 Volts RMS (10 mW) into 600 ohms or >5.0 VRMS open circuit Attenuator:
Continuously Variable >40dB range Distortion: <.1% 30 Hz to 100 KHz
Hum and Noise Voltage: <0.01% of output Synchronization Output: Can
be synchronized to an external signal. Synchronization Output: Sine wave
in phase with output; fixed level 100mV into 10 Kohms, 100pF Input Voltage:
115 or 230 VAC Power Consumption: 7 VA Net Weight: 6 lbs (2.7kg) Shipping
Wt.: 8 lbs (3.6 kg) Dimensions: 6.1 x.5.1 x 8"
All solid state. Originally used to sweep video transmission loops for frequency response. It is DEAD FLAT, output is leveled to 0.05 dB! It has some special features (60 Hz Square wave, simulated video signal, sync pulse) but it works great for general purpose sine wave signal generation covering 10 Hz to 10 MHz in 6 ranges. Accurate gear driven frequency dial. Fabulous 1 dB step attenuator covers 100 dB range from +11 to -90 dBV or dBm with +/- 0.15 dB accuracy . Has selectable 75 ohm unbalanced or 124 ohm balanced output using very cool Western Electric 358A and 408A output jacks.
EICO 377 Sine and Square Wave Audio Oscillator
Nice low-cost unit with both sine and square wave functions. Sine/Square oscillators are difficult to find. Tube Type Wein-bridge type oscillator with a cathode follower for high power output. Great for Hi Fi or guitar amp work.
Specifications:
Frequency Range: 20 Hz to 200 kHz in 4 ranges
Frequency Response: +/- 1.5 dB over 60 Hz to 150 KHz
Output Range: 0-10 volts across 1Kohm.
Dimensions: 11 x 7 x 7 3/4"
Weight: 14 lbs
Modification for older versions
50 Khz to 65 MHz. Output Range: 0.1 microvolt to 3 volts into 50 Ohms, Output adjustable by 10 db stepped attenuator and vernier dial and calibrated meter in volts or dBm. Accuracy better than +/ 1dB at any frequency. Modulation: 400 Hz, 1000 Hz and External. Internal Crystal Calibrator. Dimensions: 21x12x15 inches.
HEWLETT-PACKARD 3400A RMS AC Voltmeter
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DESCRIPTION: A true root-mean-square (rms) voltmeter, providing a meter
indication proportional to the dc heating power of the input waveform.
Six-decade frequency coverage makes the HP3400A extremely flexible for
all audio and most RF measurments and permits the measurement of broadband
noise and fast rise pulses.
FEATURES: -10 Mhz Bandwidth -High crest factor for accurate pulse measurements -Stable linear DC output -1 mV full-scale seeensitivity -10 Mohm input impedance -Taut-band individually calibrated meter
SPECIFICATIONS: Voltage Range: 1.0 mV to 300 V Full Scale in 12 ranges
dB Range: -70 dB to +52 dB Freq Range: 10 Hz to 10 Mhz Response: Responds
to the rms value of the input signal for all waveforms Accuracy: 50 Hz
to 1 MHz +/- 1% of Full Scale Input Impedance: 10 Megohms shunted by less
than 20pF Power: 115 or 230 V +/- 10%, 48 to 66 Hz, 15 VA max Dimensions:
6.25" x 5.1" x 11" Net Weight: 7.3 lbs Shipping Weight: 10 lbs
GENERAL DESCRIPTION: Solid state AC voltmeter. Great for measuring output levels on preamps, power output levels on amps, Frequency response, crossovers, etc. Has mirrored scale meter with linear and dB scale calibrations for highly accurate measurments.
SPECIFICATIONS Range: 1.0 mV to 300 V Full Scale, -60 dB to +52 dB in
12 ranges (1,3,10 Sequence) Freq Range: 10 Hz to 10 Mhz Accuracy: 40 Hz
to 2 MHz +/- 1% of Full Scale Calibration: Reads RMS value of sine wave;
(based on 0dB=1MW in 600 ohms) 10 dB intervals between ranges. Input Impedance:
10 Megohms shunted by less than on all ranges Maximum Input: 500 Vrms,
300 Vdc Power: 115 or 230 VAC +/- 10% 48 to 440 Hz6 VA max Dimensions:
5 1/8"W x 6 1/4"H x 11"D Weight: 6 lbs Shipping: 9 lbs Controls: Range,
On/Off
DESCRIPTION: Great for measuring output levels on preamps, power output levels on amps, Frequency response, crossovers, etc. Has large 5" mirrored scale meter with linear and dB scale calibrations for highly accurate measurments.
SPECIFICATIONS Range: -70 dB to +52 dB in 12 ranges, 1.0 mV to 300 V
Full Scale Freq Range: 10 Hz to 4 Mhz Accuracy: 50 Hz to 500 KHz +/- 1%
of Full Scale Calibration: Reads RMS value of sine wave; (based on 0dB=1MW
in 600 ohms) 10 dB intervals between ranges. Input Impedance: 10 Megohms
shunted by less than 20pF Dimensions: 7 1/2"W x 11 1/2"H x 12"D Net Weight:
18 lbs Shipping Weight: 20 lbs Controls: Range, On/Off.
SPECIFICATIONS, Hp 400H (Shown):
Range: -70 dB to +52 dB in 12 ranges, 1.0 mV to 300 V Full Scale
Freq Range: 10 Hz to 4 Mhz
Accuracy: 50 Hz to 500 kHz +/- 1% of Full Scale Calibration:
Reads RMS value of sine wave; (based on 0dB=1MW in 600 ohms)
10 dB intervals between ranges.
Input Impedance: 10 Megohms shunted by less than 20pF
Dimensions: 7 1/2"W x 11 1/2"H x 12"D
Net Weight: 18 lbs Shipping Weight: 20 lbs
Controls: Range, On/Off.
SPECIFICATIONS, Hp 400D:
Range 1.0 mV to 300 V Full Scale,
Freq Range: 10 Hz to 4 Mhz, Accuracy: 20 Hz to 1 MHz +/- 2% of FS,
Elsewhere +/- 5%
Input Impedance: 10 Megohms shunted by less than 20pF D
imensions: 7 1/2"W x 11 1/2"H x 12"D
Weight: 18 lbs Shipping: 20 lbs, Controls
Range, On/Off.
- Analyzer Frequency Range: 10 Hz to 110 kHz (including harmonics to
330 kHz)
- THD Measurements: at least 0.0018%
- Distortion Measurement Range: 0.01% to 100% full scale (-80 dB to
0 dB) in nine ranges.
- Oscillator Frequency Range: Distortion Measurement Set: Analyzer,
Oscillator and True RMS Voltmeter in One Box in four overlapping decade
ranges.
- Output Level: Variable from less than 1 mV to greater than 3 V rms
into 600 Ohms with 10 dB/step level control and 10 dB vernier adjustment.
-Voltmeter Range: 0.1 mV to 300 V RMS full scale (-80 dB to +50 dB
full scale, meter calibrated in dBV and dBm into 600 Ohms).
DESCRIPTION: This is the classic solid state workhorse distortion analyzer. Covers 5 Hz to 600 Khz. Measures THD down to 0.03%. It also doubles as a highly accurate AC Voltmeter with voltage and dB scales. Has an auto-nulling circuit that allows quick distortion measurements and AM detector.
SPECIFICATIONS: Freq Range: 5 Hz to 600 Khz Distortion Range: 0.1 % to 100% Full Scale Residual Distortion: less than -70 dB (0.03%) Accuracy: +/-3% over 10 Hz to 1 MHz with fundamental input less than 30V to 0.3% THD Fundamental Rejection: Greater tham 80 dB Input Impedance: 1Mohm +/-5% shunted by <70pF Voltmeter Range: 30uV to 300V rms full scale (13 ranges) 10 dB per range. Automatic Null Accuracy: Within 0 to +1.5dB of Manual null 100Hz to 600 KHz Dimensions: 16 3/4" x 5" x 13 1/4" Weight: 17 3/4 lbs Shipping Wt: 23 lbs
HEWLETT-PACKARD 331A Total Harmonic Distortion (THD) Analyzer
DESCRIPTION: Same as HP334A except without auto-nulling circuit, AM Detector or Low pass Filter.
Covers 5 Hz to 600 kHz. Measures THD down to 0.03%. A distortion analyzer is required for proper measurement of amplifier power output. It also doubles as a highly accurate AC Voltmeter with voltage and dB scales, solid state. Front panel shown in the picture above is a cool custom NASA brown color. The Hp332A is identical to the Hp331A except includes an AM Detector.
Description: Combines function of AC-VTVM, wattmeter,
and IM analyzer in one compact unit:
High and low frequency oscillators built-in
for IM tests
Built in load resistors of 4, 8, 16 and 600
ohms
Large easy-to-read meter--flexible switching
system simplifies operation
Specifications: --Frequency Response: AC VTVM--10 cycles to 100 kc ± 1 db. Wattmeter--10 cycles to 50 kc ± 1 db. IM Analyzer High Pass Filter--2000 cps to 12000 cps. IM Analyzer Low Pass Filter--10 cps to 600 cps. Range: AC VTVM--0.01, 0.03, 0.1, 0.3, 1, 3, 10, 30, 100, 300 V. RMS full scale. DBM-- -40, -30, -20, -10, 0, +10, +20, +30, +40, +++50. Reads from -65 to +52 DBM. Wattmeter--15 mw, 1.5 mw, 15 mw, 150 mw, 1.5 w, 15 w, 150 w full scale. Maximum continuous power 25 watts, intermittent power to 50 watts. IM Analyzer--1%, 3%, 10%, 30%, 100% full scale. Input Impedance: AC VTVM--1 megohm or 4, 8, 16 or 600 ohms switch selected. IM Analyzer--1 megohm or 4, 8, 12 or 600 ohms switch selected. Wattmeter--4, 8, 16 or 600 ohms internal load, 10,000 ohms across ext. load. Output Impedance: Low and High Frequency Output--3000 ohms (600 ohms when shunted with a 750 ohm resistor). Internal Generator Frequencies: Low Frequcncy--60 cycles. High Frequency--Approximately 6 kc. Accuracy: AC VTVM and Wattmeter--Within 5% of full scale. IM Analyzer--Within 10% of full scale. Power Requirements: 115-125 VAC, 50-60 cycles, 20 watts.Dimensions: 13" wide x 8½" high x 7" deep. Shipping Weight: 13 lbs.
HEWLETT-PACKARD HP1200B and HP1201B Dual Trace Differential Input Oscilloscopes for Balanced Line Measurements
DESCRIPTION: All solid-state, dual channel, lightweight reliable and stable oscilloscopes for a varitey of applications. Differential inputs on both channels allows proper monitoring and troubleshooting of balanced line applications. The 100uV/division sensitivity is useful in low level audio applications.
HP1200B has a conventional CRT and the HP1201B has a storage/variable persistence burn resistant CRT which is great for low frequency work and displays that occur at slow rates to eliminate flicker. Both scopes are in the rackmount configuration but also sit nicely on a shelf above your bench.
Features: Dual Channel, Differential Inputs on both channels. 100 microvolt/division sensitivity on both channels Modes: A, B, Chop, Alternating, A vs B (xy) mode with less than 1 degree phase error. FET vertical inputs for low-drift and freedom from trace shifts. Internal Graticule No-parallax CRT Calibrated sensitivity and sweep ranges Beam Finder Automatic Triggering 10x Sweep Expand Internal Calibrator, 1V Square Wave No Fan, perfect for use in quiet environments
Specifications: Bandwidth: DC Coupled DC to 500Khz, AC coupled 2 Hz
to 500 Khz Risetime: 0.7 uSec max Noise: less than 20uV at full bandwidth
Input Impedance: 1Mohm shunted by approx 45 pF, constant on all ranges
Isolation: greater than 80dB between channels Time Base Sweep: 1 uS/div
to 5 sec/div Triggering 50 Hz to above 500 Khz Triggering Modes: Int, Ext,
Line Sweep Modes: Auto, Normal, Single, Free Run Power: 115 or 130 VAC,
48 to 440 Hz, 60 Watts Dimensions: 19" W x 5 1/4' H x 17 1/8"D Net Weight:
1200B 22 1/2 lbs , 1201B 27 1/2 lbs Shipping Weight: 1200B 35 lbs, 1201B
40 lbs
Features:
Dual Channel, Modes: A, B, Chop, Alternating,
FET vertical inputs for low-drift and freedom from trace shifts.
Internal Graticule No-parallax CRT
Calibrated sensitivity and sweep ranges
Beam Finder
Automatic Triggering
10x Sweep Expand
Internal Calibrator, 1V Square Wave
No Fan, perfect for use in quiet environments
Specifications:
Bandwidth: DC Coupled DC to 7 MHz, AC coupled 2 Hz to 7 MHz
Risetime: 50 ns max
Input Impedance: 1Mohm shunted by approx 35 pF, constant on all
ranges
Input Range: 5 mV/division sensitivity on both channels
Time Base Sweep: 1 uS/div to 5 sec/div
Triggering Modes: Int, Ext, Line
Sweep Modes: Auto, Normal, Single, Free Run
Power: 115 or 130 VAC, 48 to 440 Hz, 75 Watts
Dimensions: 8 5/16" W x 11 3/4" H x 18 11/16" D
Net Weight: 24 lbs
Shipping Weight: 35 lbs
DESCRIPTION: General purpose laboratory or service bench scope, perfect for audio work. Great for restoring and troubleshooting hifi and guitar amps.
The HP120B is featured on the cover of Ritchie Fliegler's "The Complete Guide to Guitar and Amp Maintenance" which, by the way, is a great book.
FEATURES: o Balanced Input o Automatic Triggering o No-parallax, no-glare CRT o Calibrated sensitivity and sweep ranges o Beam Finder o 5x Sweep Expand o Vertical and Horizontal Vernier Controls o Internal Calibrator
SPECIFICATIONS: Time Base Sweep: 2 uS/cm to 200ms/cm Bandwidth: DC to
450 KHz Sensitivity: 10 mV/cm to 100v/cm, in 4 calibrated steps with attenuator
accurace of +/-3dB. Input Impedance: 1Mohm shunted by 50 pf Calibrator:
Automatically connected to vertical amplifier, accuracy +/-2% Common mode
rejection: at least 40 dB CRT Accelerating Potential: 2700 VDC Regulated.
CRT: G203E (P31 Phospher), 5 inches in Diameter CRT Internal Graticule:
10x10 cm, 2mm subdivisions Power Requirements: 115 or 230 VAC 50/60Hz,
95 Watts Dimensions: 7 1/2" H x 16 3/4"W x 18 3/6" L Weight: 32 lbs, Shipping
Wt: 45 lbs
FEATURES:
o Dual Trace with Chop and Alternating Trace Modes
o Internal Graticule No-parallax CRT
o Calibrated sensitivity and sweep ranges
o Beam Finder
o Scale Illumination Control
o Automatic Triggering
o 5x and 10x Sweep Expand
o Internal Calibrator
o Outputs: Main and Delayed Gates, Main and Delayed Sweeps
SPECIFICATIONS:
1801A 50 MHz VERTICAL AMPLIFIER:
5 Modes: Channel A alone, B alone, A & B Alt, Chop with blanking,
A + B
Bandwidth: DC to 50 MHz
Sensitivity: 5 mV/cm to 20V/cm, in 12 calibrated positions with
1,2,5 sequence
Attenuator Accuracy: +/-3dB.
Rise-Time less than 7 ns
Input Impedance: 1Mohm shunted by 25 pf
Triggering; A, B, A+B modes, dc to 50 MHz
1821A TIME BASE AND DELAY GENERATOR
Time Base Sweep: 0/05 uS/cm to 2sec/cm
Triggering dc to 50 MHz
Triggering Modes: Int, Ext, Line
Sweep Modes: Auto, Normal, Single
Display Modes: Main, Mixed, Delayed
181AR MAINFRAME
Calibrator: 1 kHz Square Wave, 3uS rise time
CRT Accelerating Potential: 12KV.
CRT: P31 Phospher
CRT Internal Graticule: 8x10 cm, 2mm subdivisions
Power Requirements: 115 or 230 VAC 50/60Hz, 110 Watts
Weight: 32 lbs, Shipping Wt: 44 lbs
Tek also made a Spectrum Analyzer plug-in for this scope. Accepts up to three 5000-Series plug-ins, two Vertical and One Horizontal. Comes with 5B10N, Time Base, 100 nS to 5S/div. Horizontal Plug-in, and your choice of Vertical plug-ins. Rack-mount format, 5 1/4 H x 19 D x 19 W, 24 lbs, Shipping Wt. 32lbs
o Dual Trace System: w/2x 5A15N,
Vertical Amp 1 mV to 5V/div
o Triple Trace System: w/1x 5A18N,
Dual Trace Amp 1 mV to 5V/div and 1x 5A15N,
Vertical Amp
o Quad Trace System: w/2x 5A18N,
Dual Trace Amp 1 mV to 5V/div
Full featured portable solid state dual trace oscilloscope. Full triggering features including video syncand z-axis input. 19 calibrated sweep ranges. Rectangular CRT, 8 by 10 cm viewing area, internal graticule and scale illumination. 1mV sensitivity. Pushbutton function switching, video sync, channel 1 output, Z axis input, and x-y operation. 90 to 264 VAC, 50/60Hz.
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Solid state, small,portable, general purpose laboratory or service bench scope. The vertical amp is a plug-in module so there may be other plug-ins available for the series. It has the normal internal and external trigger functions. Made by Magnavox.
GENERAL RADIO Type W5MT Bench VARIAC
120VAC input, 0-140VAC/5 amps output, with fully enclosed case (no
holes), circuit breaker, switch, outlet and line cord.
SPECIFICATIONS: Input Voltage: 240 VAC 50-60 Hz Output Voltage Range:
0-280 volts Rated Current: 4.0 Amps KVA: 0.86 Dimensions: 6" W x 8" H x
6" D (approx) Net Wt: 25 lbs
DESCRIPTION: Very nice bench VARIAC. Fully enclosed in case (no holes) with 3 wire grounded line cord and outlet, switch, circuit breaker and handle. Indispensable on the service bench. Heavy duty industrial grade construction.
SPECIFICATIONS: Input Voltage: 120 VAC 50-60 Hz Output Voltage Range:
0-120 volts or 0-140 volts switchable, 50-60 Hz Rated Current: 6.0 Amps
KVA: Dimensions: 5" W x 7" H x 5" D (approx) Net Wt: 12 lbs
DESCRIPTION: 8 Amp VARIAC in fully enclosed (no holes) in case with current and voltage meters, fuse, grounded line cord, two grounded line outlet sockets, switch, light, and handle. The large 3 1/2" Panel meters are still in calibration.
Metered Variacs are very convienent and rare.
SPECIFICATIONS: Input Voltage: 115 VAC 50-60 Hz Output Voltage Range:
0-135 volts Rated Current: 8 Amps KVA: 1 Dimensions: 8” W x 10” H x 8”
D (approx) Net Wt: 15 lbs
SPECIFICATIONS: Input Voltage: 115 VAC 50-60 Hz Output Voltage Range:
0-135 volts Rated Current: 7.5 Amps KVA: 1 Dimensions: 4 1/2" W x 6 1/2"
H x 6" D (approx) Net Wt: 10 lbs
Industry standard bench in-circuit transistor tester. Great for solid-state amp repair work. In-circuit features saves hours on the bench.
Tests NPN, PNP, FET, SCR diodes, or Darlington semiconductor devices in or out of circuit. Patented DYNAPEAK system lets you perform reliable in-circuit tests with shunt resistance as low as 10 ohms and capacity as high as 15 uF.
Easy Operation: Connect leads in any order to device or use built-in
socket. A pulsating audio tone indicates "good". All three
leads are automatically identified. Meter is calibrated for silicon
and germanium leakage limits. Identifies NPN or PNP, silicon or germanium.
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Laboratory multifunction meter with mirrored analog scale.
- DC Voltages from 100mV to 1 kV Full Scale
- AC Voltages from 10mV to 300 V Full Scale at Frequencies from 10Hz
to 1 MHz
- Resistance from 10 ohms to 10 Megohms Full Scale
- Option 001 AC Power Supply and Battery
GENERAL RADIO Type 1450 Precision Decade Attenuator
Precision laboratory grade 600 ohm balanced decade attenuator.
Works perfect as a PASSIVE PREAMP in audio applications. Will drive the balanced input of that amplifier directly. Can also be used for unbalanced. Has 10 dB and 1 dB attenuation steps. Wild and cool.
DESCRIPTION: The resistors used in each decade are mounted in compartments shielded by the addition of aluminum covers. Each decade consists of four T pads series connected by cam-operated switches arranged with positive detets. All cams are mounted on a control shaft which is provided with ball bearings. Each pad is completely shielded and a shield is interposed between the input and the output series elements of each pad. Each decade has 11 positions, 0 to 10 inclusive, so the decades overlap. There are no stops on the 1 dB per step decade, thus facilitating quick return from full to zero attenuation.
In short, unbelievably well designed and constructed.
SPECIFICATIONS: Attenuation Range: 110 dB in steps of 1dB Terminal Impedance: 600 ohms in either direction. An etched plate on the cabinet indicates the mismatch loss for other than 600 ohm circuits. Accuracy: +/- 0.02 dB (!) Frequency Range: DC to 1 MHz Maximum Power Input: 1 Watt Switches: Cam-type switches are used with 12 positions covering 360 degrees. The dials are numbered 0 to 10 inclusive and the twelfth point is also connected to 0. Terminals: Jack-top binding posts with 3/4 inch spacing (standard banana jacks). Common terminal insulated from chassis; ground post provided. Cabinet: Lab Bench. Each decade is individually shielded, and all shields are connected to the panel, to which the G post is connected (one point common). Dimensions: 10 x 5 3/4 x 12 1/4 inches Net Weight: 10 3/4 lbs Shipping Weight: 18 lbs
