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How to make an Oscillator for AM radio transmitter?

Discussion in 'Radio and Communications' started by sr13579, Apr 12, 2018.

  1. sr13579

    sr13579 Member

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    I was looking for an 1MHz oscillator for AM radio transmitter circuit. But I couldn't find one with the 4 pin crystal quartz oscillator. How to make an oscillator by myself with basic electronics materials? Any Circuit or ideas?
     
  2. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Do you have a license to operate a radio transmitter on the AM broadcast band that will not cause interference to other radio stations or other frequencies?
    A very low power AM radio transmitter might transmit as far as across the street but it can cause interference to a neighbour who is listening to an AM radio station, then it is illegal.
     
  3. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

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    upload_2018-4-12_9-7-14.jpeg
    Almost every company that makes crystal oscillators makes one at 1mhz. I order through digikey.com
    What country are you in?
    540 to 1600 kHz Any frequency in this range. You should look for a frequency that is not used in your area.
    Is 1mhz open on your radio?
     
  4. dave miyares

    Dave New Member

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  5. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Here is some info about a crystal oscillator module:
     

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  6. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

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    Do you any of the "oscillators in a can"?
    We can show how to make a very simple one IC divide down circuit. (divide by 2, 4, 8, 16, 32....)
    So a 16mhz oscillator is very common. One IC and you can have 1mhz.
    Divide by numbers like 5 is harder and causes some problems.
     
  7. MikeMl

    MikeMl Well-Known Member Most Helpful Member

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    • Informative Informative x 1
  8. dave miyares

    Dave New Member

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  9. davenn

    davenn Active Member

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    to the OP sr13579 ... be aware that these canned oscillators are square wave output ( designed for digital circuits)....
    and therefore are full of harmonics and that isn't a good thing to connect an antenna to

    Dave
     
  10. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

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    There needs to be a band pass filer, or a low pass filter to kill the harmonics.
     
    • Agree Agree x 1
  11. skywave

    skywave New Member

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    Buy a "full can crystal oscillator" and a "555 Timer IC". Buy several of each , they are cheap and you will probably burn them up.
     

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