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Transistor Cross Over

Discussion in 'General Electronics Discussion' started by Warlord, Jul 25, 2014.

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  1. Warlord


    Jul 1, 2014
    Building a Fog Horn for my light house and I need replacement transistors for a BC547 and a BC 557. I have done Google searches but but have only been slightly helpful.
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Both BC547 and BC557 are readily available.

    They are jellybean components and it is unlikely they were chosen for any particular reason (other than being common).

    If you have a copy of the schematic we can tell for sure, but you can try any small signal NPN and PNP transistor. A 2N3904 and 2N3906 may be suitable.
    KrisBlueNZ likes this.
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