Test Equipment: Audio Signal Generators
Gaussian Noise Generator
(EQP) ELG-610A
Elgenco gaussian noise generator provides a reliable noise source having a gaussian distribution with negligible DC unbalance. 8 frequency ranges with switchable attenuation ranges from X.0001 to X1.200 ohm out put impedance into double banana jack.
  • Dimensions: 12" x 9" x 5.5"H
$325 each
Dual Channel Precision Variable Audio Filter
0.01 Hz to 99.9 KHz
(EQP) KH3343
Krohn-Hite Model 3343 dual channel precision variable audio filter. Digitally tuned over a frequency range of 0.01 Hz to 99.9 KHz. Can be operated in low-pass, high-pass, band-pass or band-reject mode. Attenuation slope of 96 db per octave in high-pass or low-pass mode and 48 dB per octave in band-pass or band-reject mode. Distortion is less than 0.1% over most of the range. Output impedance of 50 ohms. In excellent condition.

Features:
  • Frequency Range: 0.01Hz to 99.9 KHz
  • Frequency Accuracy: ±2%
  • Pass Band Gain: 0 dB or 20 dB
  • Attenuation Slope: 48 dB/oct. (each channel)
  • Battery Operation
  • Maximum Attenuation: 80 dB
  • Floating (ungrounded) Operation
Specifications:
  • 0.01 Hz to 99.9 KHz frequency range
  • 48 db per channel attenuation slope
  • 0 dB or 20 dB pass band gain
  • eight pole butterworth or rc response
  • ±2% calibration accuracy
  • < 0.1% distortion (typically)
  • 0.5 mv RMS hum and noise
  • 80 dB maximum attenuation
  • Dimensions: 17" x 17" x 6"
Originallly sold for $3,456. Our price...
$1,489 each
HP 200C Audio Oscillator
20 Hz to 200 KHz
(EQP) HP200C
Hewlett Packard 200C audio oscillator. 20 Hz to 200 KHz output. 100 mW, 10v in to 1k ohm load. One of the original HP RC audio oscillators that made HP famous. A rare find. No cabinet, rack model. 19" x 7" x 10-3/4". Weighs 24 lbs.
*** SOLD OUT ***
HP 200TR Precision Telemeter
250 Hz to 100 KHz
(EQP) HP200TR
Hewlett Packard 200TR precision telemeter test oscillator. 600 ohm output. 250 Hz to 100 KHz, ±1 dB. 160 mW or 10v output. Rack mountable. 19" x 8-1/4" x 11-3/4". Weighs 28 lbs. Works. Switches and controls dirty.
$225
Output Power Meter
(EQP) 1P-1
Industrial Instruments output power meter. Measures audio frequency power into 48 different impedance loads. Similar to Genrad 1840-A.
$150
HP Audio Oscillator
5 Hz to 600 KHz in 5 Ranges
(EQP) HP200CD
Hewlett Packard 200CD audio oscillator. 5 Hz to 600 KHz in 5 ranges. 2:1 main drive. 9:1 rim drive. Up to 1/4 watt output into 600 ohms. 7" x 10-3/4" x 10-1/2". Parts only, non-working, as-is.
$175
SG1168/U Signal Generator
3 Hz to 1 MHz
(EQP) SG1168/U
SG1168/U signal generator received from military surplus. 3 Hz - 1 MHz. Unknown condition. Assume it does not work. Take a chance?
$95 each
Distortion Analyzer
HP 333A
(EQP) HP333A
The 333A distortion analyzer measures total distortion down to 0.1% between 5 Hz and 600 KHz harmonics up to 3 MHz. Measures noise as low as 50 µV, voltage from 300 µV to 300v full scale. Automatic nulling mode and high-pass filter: 3 dB point at 4. Used, sold as-is.
$249 each
Audio Oscillator
5 Hz - 1.2 MHz
(EQP) HP204C
HP audio oscillator. 5 Hz - 1.2 MHz. 6 ranges, 600 ohm output.
*** SOLD OUT ***