TDA2822 (Equivalent KA2209)

Discussion in 'General Electronics Chat' started by lubnaan90, Jan 29, 2010.

  1. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    Hi all ,
    Constructed a Low power Stereo amplifier out of TDA2822 (Equivalent KA2209)(scheme attached).
    Every thing is Working Fine , except The amplifier is collecting Radio Frequencies for some reason , especially when the AV cable is connected .
    So the output is a Remix of Songs from Radio & the Mp3 Player
    Any help will be deeply appreciated .
     
  2. bertus

    Administrator

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

    What kind of cable do you use between the MP3 and the amplifier?
    It sounds like an RFI problem.

    Greetings,
    Bertus
     
  3. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    Its the Usual Stereo Cable , 3.5mm at one end & A/V connection at the other. like the one in the pic attached.
    I am using the same cable with my other power amp , but every thing is fine there (no radio Frequencies) .
    So any solution to deal with this problem ?
     
  4. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    Hi all,

    It seems the RCA female socket i am using is Catching the radio frequency (R/F) , as i tried connecting the amplifier without using the RCA female socket , the output is crystal clear , but when i use the same , The R/F is heard .

    So any suggestions to ground the radio frequency ?
     
  5. bertus

    Administrator

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

    Is the ground ring of the RCA male connector making good contact to the female one?
    It can be the ground springs needs to be pressed a tiny bit in.

    Greetings,
    Bertus
     
  6. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    Tried that before you Replied , But still the same problem .
     
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