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TV Antenna Amplifier Circuit

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A very simple and cheap tv antenna amplifier circuit built with BF961 a N–Channel Dual Gate MOS common transistor used for input and mixer stages especially for FM- and VHF TV-tuners up to 300 MHz.

L1 = L2 = 5turns / 0.8mm Ø / 5mm Ø / the second turn from ground.
This tv antenna amplifier can be used even as an fm receiver amplifier because it has a wideband amplification, so if you don’t use it for the tv set you can receive your favorite radio stations in better conditions.

TV Antenna Amp Circuit Diagram

tv antenna amplifier circuit diagram

BF961 datasheet

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19 Responses to “TV Antenna Amplifier Circuit”

  1. tek says: on January 1, 2009 at 2:02 pm

    very good
  2. Hossein says: on May 8, 2009 at 6:35 pm

    very very GOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOD
    • fred says: on December 28, 2009 at 3:31 pm

      Hi Hossein,did you built the above project? Care to share some video or pic of the project?I need to see the outcome before doing this project.Thanks
  3. Shan says: on June 17, 2009 at 6:51 pm

    Can use for UHF?
  4. fozol says: on January 25, 2010 at 5:04 pm

    i’m searching for communication project….
    any one know any good web site????
  5. Silas says: on February 28, 2010 at 11:16 pm

    Can you please make your schmatic diagram very bold and clear.thanks i really love this site
  6. rocknjulius says: on March 28, 2010 at 2:09 pm

    Is this work?? Or its just a waste of time? kindly reply me on my email add: rocknjulius@yahoo.com.. thanks guys..
  7. narendra says: on January 11, 2011 at 7:42 am

    give more description about L1 and L2
  8. Rob R says: on February 8, 2011 at 12:34 am

    what is the input wattage and db.gain
  9. stephen onsando says: on February 16, 2011 at 12:59 pm

    I really ned to join your company andf be part of you.plewase accept me. i hopoe to hear from you soon.
  10. Stas says: on May 4, 2011 at 7:05 pm

    l1 1 uH
    L2 150uH
  11. Stas says: on May 4, 2011 at 7:05 pm

    U VCC 12V
  12. Musa Shuaibu Opaluwa says: on June 28, 2011 at 8:27 am

    Please, how do I identify the gates of the MOS? I’m trying to embark on it, help me out please.
  13. Albert Palacio says: on August 8, 2011 at 5:21 pm

    can you post a pictorial diagram on your TV antenna AMP tnx
  14. aliasghar says: on November 15, 2011 at 8:19 am

    Very good.Thank You
  15. ABID says: on September 25, 2012 at 1:14 pm

    HOW TO EARTH IT>>>>ITS BURN IN RAINI WEATHER????
    • Jim Keith Jim Keith says: on September 25, 2012 at 1:46 pm
        member

      This circuit is subject to failure from electrostatic discharge. A lightning strike that sometimes accompanies rain could easily do this, and it does not even have to a close hit.

      Perhaps anti-parallel diodes (1N4148) connected gate to ground would offer protection. That would add 4pf each for a total of 8pf. Using (4) diodes in series parallel would drop this shunt capacitance to 4pf. The 6-25pf trimmer would need readjustment to compensate for the added capacitance.

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