MCM Electronics

Compact Audio GeneratorMCM Part #: 72-490  |  Tenma Part #: 72-490

Compact Audio Generator 3.3 stars from 3 reviews.
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Highly versatile audio generator is perfect for sound system and speaker component testing. Its high precision and remote VCO input make it suitable for the serious test environment, yet its compact size and low cost make it suitable for any tool box. Features: •Rotary frequency adjustment •Independent sine and square wave outputs, each with their own level control •VCO input for remote frequency setting •1/4" unbalanced outputs •Selectable 0dB/10dB output attenuator

Product Description

  • Rotary output frequency adjustment
  • Independent sine and square wave outputs, each with their own level control
  • VCO input for remote frequency setting
  • 1/4" unbalanced outputs
  • Selectable 0dB / 10dB output attenuator

  • Frequency range: 20Hz ~ 20KHz ±1dB
  • VCO input: 1.2 ~ 5.0VDC for full frequency output
  • Output level: +11dB (sine), +14dB (square)
  • Output impedance: 100ohm
  • THD (sine wave): 1%
  • Power requirements: 12 ~ 16VDC, 50mA, AC adaptor included
  • Dimensions: 1.57" (H) x 4.49" (W) x 2.87" (D)

  • Product Reviews

    • "good little audio generator" by adv300 on 10/4/2013
      Overall: 4 out of 5

      I use this for light duty audio frequency generation. I have used it about 10 times now and it has worked fine so far. I am feeding a small audio amp so I used a 1/4 inch (male) to 1/8 inch mini plug (female) to adapt. I have not used the VCO control, but the front panel frequency and level work fine. To get an accurate picture of the output frequency you should use an external frequency counter. If your needs are general and do not require high accuracy and single frequency is OK this this is not a bad little unit. Less trouble than some of the free PC signal generators that I have used because you don't need to boot it and knobs are better than a point and click volume and frequency adjustments. It is small - footprint of a smartphone only 4 times thicker. For what it cost not a bad little unit.

    • "Very Rugged and Well Built" by installpro on 4/2/2013
      Overall: 5 out of 5
      Top 10 Contributor

      Love the feel and build of this. Heavy metal box and high quality controls. I don't use this for anything too precise, just testing speakers and amplifier installations. Has enough output to drive a speaker directly (at a low level). Works great feeding any type of amplifier input except it is too high for a mic or phono input. I highly recommend.

    • "Cannot USE on My NAD amplifier no information on cable specifics" by RottNzweiler on 10/9/2012
      Overall: 1 out of 5

      I thought you would give instructions on how to hook this up to my NAD electronics amplifier or KEF 104/2 speakers I purchased in 1987 while stationed in RAF Woodbridge UK but no standard hookup shielded RCA cable was compatible which is what we still use today to interconnect most components

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    Package Specifications & Dimensions
    Weight:1.51 lbs.
    Warranty:365 days
    Need to Return?
    Length:9 in.
    Width:5.25 in.
    Height:3.25 in.
    Shipping Information
    Extra Shipping Charge:No
    Drop Ship:No
    Catalog Pages

    MCM Cat 57, Page 1286

    MCM Cat 56, Page 1126

    PDF Reference

    Requires Adobe Acrobat Reader.

    Mfr. Info

    Tenma Logo
    Mfr. Name:Tenma
    Mfr. Part Number:72-490
    Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.
    Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.