Help on Linear input split transformer making.

Discussion in 'General Technical Questions and Answers' started by SV2SBE, Aug 14, 2020.

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  1. SV2SBE

    SV2SBE Ham Member QRZ Page

    Hello,
    I have an amplifier working on LF 300-600Khz. Output is maximum at 10watts. And i want to use a type of binocular or a set of ferrites to split the output signal in two equals 180deg out of phase. Like used on all the push - pull linears.
    Any help please especially for the material to use, and if its easy info about the turns of cable for the construction of it?

    Thanks
    George
     
  2. SV2SBE

    SV2SBE Ham Member QRZ Page

    any help please?
     
  3. N7EKU

    N7EKU Ham Member QRZ Page

    Hi George,

    Not an expert, but this material seems appropriate: http://toroids.info/FT50-75.php You may need more than one core depending on if you experience heating or not, or if you need more reactance for good transformer action (generally it is recommended to have at least 4X the input or output impedance that the transformer will see).

    For turns, it depends on what you need. Some amps use a simple current balun type which balances the input but doesn't do any transformation of impedances, others use different windings in a transformer mode if impedance changes are needed.

    73
     

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