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Audio spectrum analyzer 0 - 100kHz, US $79.00 – Picture 0
Audio spectrum analyzer 0 - 100kHz, US $79.00 – Picture 1
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Audio spectrum analyzer 0 - 100kHz, US $79.00 – Picture 0
Audio spectrum analyzer 0 - 100kHz, US $79.00 – Picture 1
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Audio spectrum analyzer 0 - 100kHz, US $79.00 – Picture 10
Audio spectrum analyzer 0 - 100kHz, US $79.00 – Picture 11

Audio Spectrum Analyzer 0 - 100khz

US $79.00

  • Lake Forest, California, United States
  • Jan 29th
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Before I dismantle this unit to salvage the switches, let's first see if there is anyone interested in the entire working unit. This is an audio spectrum analyzer that I made when I was younger, so much younger than today and I started to do some serious audio equipment and loudspeaker development. These are the quick reference specs: Frequency range: 0 - 100kHz Span: 1, 2, 10, 20, 100kHz Resolution BW: 100Hz / 500Hz Video BW: 1Hz / 100Hz Reference level: -40dBV to +20dBV Vertical scale: 10dB/div It uses a digital memory for the screen which can be displayed on an analog scope in XY mode.  There are two memory banks to compare two different scans. The external power supply runs at 230VAC only, but it uses a simple 24VAC transformer which can be easily replaced. I captured a few scans, using a Tektronix 2467 scope, which obviously is not included in this auction. Screen captures from left to right: 4kHz sine wave at 100Hz RBW / 10kHz span 4kHz sine wave at 500Hz RBW / 10kHz span 1kHz square wave at 100Hz RBW / 10kHz span 50kHz sine wave from a noisy PLL at 500Hz RBW / 100kHz span 50kHz sine wave from a clean RC oscillator at 500Hz RBW / 100kHz span The unit is in good working condition, but the rotary switches could use some contact spray. 

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