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Discussion in 'Datasheets, Manuals and Component Identification' started by Evan D, Jul 4, 2017.

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  1. Evan D

    Evan D

    Jul 4, 2017
    I need a data sheet for a Motorola SRF2978 power amplifier transistor. I have searched every web site available with no results. The subject resistor is used in a Swan 100MXA transceiver which uses MRF433 drivers. The model 100MX transceiver uses MRF458 power transistors and the same drivers.
  2. davenn

    davenn Moderator

    Sep 5, 2009
    yeah seems to be an oddball one
    It may have been produces for a specific customer and data isn't publically available for it ... this is common
  3. kellys_eye


    Jun 25, 2010
    Got a schematic of where it's used?

    What package type is it?
  4. Evan D

    Evan D

    Jul 4, 2017
    A responder informed me that in a lot of cases, Motorola re-designated MRF's to SRF's for specific use by companies that purchased and specified them, in this case, Swan, for the 100MXA. It is possible that they are the same as the MRF458's used in the Swan 100MX.
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