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Thread: FM De-Emphasis

  1. #1
    2pair
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    FM De-Emphasis

    What is that?

    I received a vintage s/s analog tuner in the mail today, and it has a switch on the back labeled: FM De-Emphasis 25us/75us. Thats not exactly what it says...the u has a tail, I'm sure someone knows what I mean.

    Anyway what does it do?

  2. #2
    Senior Member morbo!'s Avatar
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    i think that would be for a diffrent radio zone

    puts it in between your bands for peoplez like me

    do america and canada use

    the same system?
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  3. #3
    2pair
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    ummm.., Huh?

  4. #4
    Senior Member spkrman57's Avatar
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    To be used with a processor like a Dolby unit.

    The normal position has a normal response(filter), with the higher de-emphasis(less filtering on HF section) you could run it through a Dolby noise reduction unit if desired.

    Ron

  5. #5
    Senior Member spkrman57's Avatar
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    Helps to read the entire post....

    The funny looking "u" is abreviation for "micro" as in micro seconds if I recall correctly.

    Ron

  6. #6
    Senior Member morbo!'s Avatar
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    that was my first thought u is for micro seconds!
    but i do remember pulling apart many radio`s in my youth and some do have a switch like that on the inside or back to change zones if you take it to a diffrent country
    easy way to tell put it on a station and flick the switch
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