amplifier stage for UHF TV modulator

Discussion in 'Wireless & RF Design' started by @lpha, May 10, 2012.

  1. @lpha

    Thread Starter Member

    Feb 21, 2012
    34
    0
    Hello

    I found a modulator from an old analog sat receiver, it work between channel 30 to 42 (550 - 650MHz), so how can I build an amplifier stage with one or two transistor (common transistor not the RF transistor so difficult to found).

    thnks ;)
     
  2. @lpha

    Thread Starter Member

    Feb 21, 2012
    34
    0
    nobody can help me ? I just need to amplify the very low output to 100 or 200mW with minimum of other frequency perturabtions or atenuation of video quality pics
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    Common audio transistors will not at those high frequencies.
    Better look for a transistor called BFW16. (see attached datasheet)

    Bertus
     
  4. @lpha

    Thread Starter Member

    Feb 21, 2012
    34
    0
    it's possible to use the test circuit in the datasheet ?
    My video modulator has an output power of - 60 to - 40 dbm
     
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