PCB design for amplifier

Discussion in 'The Projects Forum' started by kaname08, Mar 17, 2012.

  1. kaname08

    Thread Starter Member

    Sep 22, 2010
    37
    0
    We had a made a amplifier using BJT and it does work in breadboard, then we transferred it in a pcb,but any sound will not be heard,
    My question is, is there a right thing in designing for the amplifier??:confused:
     
  2. jimkeith

    Well-Known Member

    Oct 26, 2011
    539
    100
    Murphy's law in action--prototypes work--production does not work

    Electrons never make mistrakes!

    Find your error--recheck--do not make assumptions--they can get you into trouble
     
  3. #12

    Expert

    Nov 30, 2010
    18,076
    9,680
    Audio amplifiers usually do not suffer from mysterious circuit board probelms. You have simply made a mistake and you must look closely until you find it.
     
  4. hgmjr

    Retired Moderator

    Jan 28, 2005
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    Can you post a copy of the amp here?

    hgmjr
     
  5. kaname08

    Thread Starter Member

    Sep 22, 2010
    37
    0
    I'm sorry about that, I really thought its our connection is the problem but my classmate said" oh your Rc is far from collector of the transistor", so i asked here if its true or not,

    you mean the pcb design?
     
  6. #12

    Expert

    Nov 30, 2010
    18,076
    9,680
    I think we are having a language problem.

    We need a schematic of the circuit...and photos of the circuit board would help a lot. Only then can we do anything besides guess.
     
  7. hgmjr

    Retired Moderator

    Jan 28, 2005
    9,029
    218
    Actually, I was referring to the schematic of your amplifier.

    hgmjr
     
  8. Audioguru

    Expert

    Dec 20, 2007
    10,966
    1,253
    Measure the DC voltages of your amplifier with no signal and post them on your schematic.
     
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