Trouble with 1w RF Amplifier

Discussion in 'Wireless & RF Design' started by doug08, Dec 19, 2012.

  1. doug08

    Thread Starter Member

    Jan 30, 2011
    153
    2
    I connected the amplifier to my very low power FM transmitter and it worked. I made a few modifications with the trimmers on the amplifier circuit, and now it hardly draws any current and no longer amplifies. I tested the RF transistor and it is fine. I also substituted a different RF transistor, and it still refuses to work. I tested the FM transmitter, and that works just fine. What is causing this problem? How can it work, then stop working with nothing burned up? Makes no sense. Not oscillating.

    Thanks.

    [​IMG]
     
  2. doug08

    Thread Starter Member

    Jan 30, 2011
    153
    2
    I did not make a few modifications to the trimmers. I simply adjusted the trimmers that were there. No parts were changed after it worked.
     
  3. bertus

    Administrator

    Apr 5, 2008
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