Transistor equivalent for bf494 & bc548

Discussion in 'General Electronics Chat' started by doug08, Mar 12, 2012.

  1. doug08

    doug08 Thread Starter Member

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    I decided to use ksp2222a to replace the bc548, and mpsh10 for the bf494. Let me know if you also think this is OK. My circuit does not work , and the transistors are definitely good(tested them).

    Thanks
  2. Audioguru

    Audioguru New Member

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    You forgot to post your radio (?) circuit so we don't know its frequencies.
  3. doug08

    doug08 Thread Starter Member

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    It is a small transmitter. I have no way to put it online. I don't have a scanner. I found it in an old electronics book.

    Thanks
  4. Audioguru

    Audioguru New Member

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    OLD, I know. I worked with the BF494 in 1969. It was the RF amplifier in an FM car radio.
    If you cause interference with FM radios or with airplane communications then you will be in for BIG trouble.
  5. doug08

    doug08 Thread Starter Member

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    No worries with that stuff where I live. LOL. Back to my question, I looked at the spec sheets and it looks like the transistors I used should work. Do you agree or disagree. All I need to know. Thank You.
  6. doug08

    doug08 Thread Starter Member

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