Transistor Replacement

Discussion in 'The Projects Forum' started by jj_alukkas, Aug 6, 2009.

  1. jj_alukkas

    Thread Starter Well-Known Member

    Jan 8, 2009
    751
    5
    Hi,

    Could somebody help me with replacement transistors for 9014(NPN, 150mA, 150MHz), 9018 (NPN, 50mA, 700MHz) and 8550(PNP, 1.5A, 200MHz)?? They are for use with a wireless device at 303MHz.. 9014 is available for me but I would like to know if a replacement is available.. 9018 is used in the transmitter tank, so it needs to get near 500MHz atleast..
     
  2. jj_alukkas

    Thread Starter Well-Known Member

    Jan 8, 2009
    751
    5
    Anybody please??
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,646
    2,345
    Hello,

    Is there a prefix before the numbers?
    Something like BF, BLX, BLY, 2N, 2S. or MRF.

    Greetings,
    Bertus
     
  4. jj_alukkas

    Thread Starter Well-Known Member

    Jan 8, 2009
    751
    5
    The circuit diagram I recieved just denotes the number but when I ask at my retailer, he says he has 'C9014'.. So I guess, all are 'c' and also since only the C series have numbers over 6000.. Any Idea??
     
  5. bertus

    Administrator

    Apr 5, 2008
    15,646
    2,345
    Hello,

    When there is an C at the beginning it will probably be a transistor from the 2SC series.
    Do you have the schematics where the transistors are used?
    With the position in the schematics it is more easy to give an answer.

    Greetings,
    Bertus
     
    Last edited: Aug 8, 2009
  6. jj_alukkas

    Thread Starter Well-Known Member

    Jan 8, 2009
    751
    5
    Oh yes, here are the ckts.

    [​IMG][​IMG]
     
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  7. bertus

    Administrator

    Apr 5, 2008
    15,646
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    Hello,

    I think you try the following transistors:
    9014 => 2N2222
    9018 => 2N3300
    8550 => 2N3762
    8050 => 2N3735

    I have also attached a transistor table that I found on the internet some time ago.
    (unzip it and you will get a spreadsheet with the data).

    Greetings,
    Bertus
     
  8. jj_alukkas

    Thread Starter Well-Known Member

    Jan 8, 2009
    751
    5
  9. bertus

    Administrator

    Apr 5, 2008
    15,646
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  10. jj_alukkas

    Thread Starter Well-Known Member

    Jan 8, 2009
    751
    5
    Yes, thats exactly the same page I converted after making it into a single column.

    And thanks a lot for the other link. It good.
     
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