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568 BLYC power transistor question?

Discussion in 'Amplifiers' started by RichardHartman, Jun 8, 2021.

  1. RichardHartman

    Feb 7, 2019
    Likes Received:
    I have a 568 BLYC transistor pictured below. I am unable to find any information or cross reference on this. Can anyone help? Its out of a Boomer RX-100


    Attached Files:

  2. DoctorAudio

    DoctorAudio Active Member

    Sep 11, 2009
    Likes Received:
    It's approximately equivalent to a MRF-454.
    tecnicoloco likes this.
  3. Shockwave

    Shockwave Sr. Member

    Sep 19, 2009
    Likes Received:
    Unfortunately it would be closer to the also obsolete MRF454A. This is a stud mount part and there are no substitutes manufactured today.

    I just checked online stock and B&D Enterprises, has NOS Motorola MRF454A transistors from 1985, for $36 each. That's a good deal for this hard to find part. Replace both at the same time to avoid balancing issues. Actual matched pairs may not be available.
    #3 Shockwave, Jun 14, 2021
    Last edited: Jun 14, 2021

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