Antenna amp

Discussion in 'General Electronics Chat' started by maf00143, Jan 22, 2006.

  1. maf00143

    Thread Starter New Member

    Jan 22, 2006
    7
    0
    hi
    i want to make a uhf antenna ampfor my tv i want to have 20 to 30 db gain.
    can i use a low noise op amp?
    Thanks
     
  2. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
    1
    hi

    sure, why not. do you already have the circuit?

    moz
     
  3. maf00143

    Thread Starter New Member

    Jan 22, 2006
    7
    0
    I havent figured out the whole circuit just yet.
    i am gonna try to keep it simple mabye just the op amp and a rf filter.
    the main thing im concerned about is blowing up my new hdtv. so i'll use my old 13'' to test it on :)
     
  4. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
    4
    There are many UHF amplifier circuit on the web. These however mostly use RF transistors instead of opamps. You could google them to gain some idea.

    Any particular reason you want to use opamp instead of RF transistor? I would've think transistor amplifier is simpler and easier to design and might be cheaper as well.
     
  5. Gadget

    Distinguished Member

    Jan 10, 2006
    613
    0
    Most op amps wouldn't work very well up at UHF. There are specialized RF amp components like the MAR series, but most comercial amps use special RF transistors and special design techniques to prevent feedback and instabilities. Designing something with 20 to 30 db gain, that is stable and low noise is something not many would attempt. I suggest buying something ready made. Its not like UHF TV amps or Masthead amps are very expensive.
     
  6. maf00143

    Thread Starter New Member

    Jan 22, 2006
    7
    0
    i'll look into getting some transistors.
    one of the big things i want to do is have seperate amps for diffrent channels on seperate antennas
     
Loading...