Push pull power amplifier

Discussion in 'General Electronics Chat' started by arfarfarfarf, Mar 26, 2012.

  1. arfarfarfarf

    Thread Starter New Member

    Mar 10, 2012
    17
    0
    HELP! We need to produce sound to a speaker by using a push pull power amp. The problem is, the speaker's impedance (8ohms) is very small compared to the circuit's output impedance (about 36ohms) that's why we have very low output voltage. Without the 8ohm speaker we have about 200 gain but with the speaker we have a less than 1 gain. what could we do with our power amplifier circuit. It is a push pull using 3904 3906 with diodes 1N4148. Thanks!
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    As always, schematics?

    My first inclination is a matching transformer. You could wind a toroid from scratch.
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    You must not have a circuit, because you didn't post a schematic.

    If you DO have a circuit, then post its' schematic. Without that, we're just wasting each others' time.
     
  4. arfarfarfarf

    Thread Starter New Member

    Mar 10, 2012
    17
    0
    Sorry I forgot! Here's my schematic
     
  5. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    Here is an audio amp that will easily drive eight Ohms or much lower impedances.
     
Loading...