Mutsumi coil needed

Discussion in 'Electronics Resources' started by Atha, Apr 30, 2016.

  1. Atha

    Thread Starter New Member

    Apr 30, 2016
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    Hi!
    I am trying to find a plain blue coloured Mitsumi coil for my old AM radio. Does anybody in here know the frequency of that coil? And perhaps where to find one of these?
     
  2. DickCappels

    Moderator

    Aug 21, 2008
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    That is not enough information to go on -Mitsumi probably made more than one type of AM radio. The more information you supply the better chance of obtaining the information you seek.

    What is the model number, the year it was manufactured, can you post a photograph of the radio and the defective coil?

    Is there any printing or color code on the coil?

    Can you tell where, in the circuit, the coil is used?
     
  3. Atha

    Thread Starter New Member

    Apr 30, 2016
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  4. Atha

    Thread Starter New Member

    Apr 30, 2016
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    On the housing of the blue coil it says 450??
     
  5. DickCappels

    Moderator

    Aug 21, 2008
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    The photos and the description you came up with make for a great start. The coil with the blue slug is almost certainly and IF transformer, but that doesn't help much. Let's see if anybody comes along with some better information.
     
  6. BR-549

    Well-Known Member

    Sep 22, 2013
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    In 1974 you could go to your electronics wholesaler and get a sam's photofacts.

    It would have all the info needed to replace that coil.
     
  7. Atha

    Thread Starter New Member

    Apr 30, 2016
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    If you mean the schematics, I have found schematics for other models close to this one. But they don't show any info on the coils. They just say the same as printed on the pcb. Which is L-3 in my case. No parts list shown.
     
  8. BR-549

    Well-Known Member

    Sep 22, 2013
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    Are you sure the transformer is bad? In all my years of repairing radios, I think I replaced a signal transformer once.

    Not only did sam's have part numbers, it had part descriptions, so if part was not available, you could substitute.

    Sam's also had signal and dc levels and alignment procedures.

    With lot's of pictorials and test points.

    There used to be web sites that sold old sam's manuals for a few dollars.

    But I haven't checked in years.
     
  9. BR-549

    Well-Known Member

    Sep 22, 2013
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  10. BR-549

    Well-Known Member

    Sep 22, 2013
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    And by golly, you can check with Midland support. They still make cb radios.

    https://midlandusa.com/cb-radios/

    Keep the shinny side up and the greasy side down, good buddy.
     
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