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Unknown metallic boxes

Discussion in 'Datasheets, Manuals and Component Identification' started by Pelletier, Jan 2, 2012.

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  1. Pelletier

    Pelletier

    5
    0
    Jan 2, 2012
    Hi!

    I found these in a grab bag of electronics parts and I have no idea what they are.

    Written on the back:
    K 1740
    FN 052
    TAIWAN

    Do you know what it is?

    Thanks!
     

    Attached Files:

  2. Electrobrains

    Electrobrains

    259
    5
    Jan 2, 2012
    Maybe an oscillator or other HF circuit. Open one!
     
  3. OLIVE2222

    OLIVE2222

    690
    25
    Oct 2, 2011
    Hi,

    With such opening at the top and 3 contacts I will say electret microphone.

    Olivier
     
  4. Pelletier

    Pelletier

    5
    0
    Jan 2, 2012
    The microphone hypothesis seems right!

    Thanks Olivier!
     
  5. KMoffett

    KMoffett

    696
    68
    Jan 21, 2009
    They are speakers used in the old Motorola Pageboy II pagers. I used to repair them...pagers...not speakers. ;) Sounded like this:



    Ken
     
    Last edited: Jan 3, 2012
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