Elenco AM-550TK Radio Audio Amp Circuit Analysis Help

Discussion in 'General Electronics Chat' started by bryantf, Jul 20, 2010.

  1. bryantf

    Thread Starter New Member

    Jul 19, 2010
    I am interested in learning how to go about doing a circuit analysis on the audio amp section of the Elenco AM-550KT transistor radio kit. The schematic is in the user's manual at http://www.tequipment.net/ElencoAM-550TK.html

    The text in the user's manual describes in general terms how the audio amp section works but it doesn't give the specific details of how to analyze the circuit.

    I have done quite a bit of reading about class ab amps, common emitter/collector/base circuits and feedback circuits but the text book always just give a basic circuit and applying the principles to this more complex circuit eludes me using standard KVL techniques. In particular, I know that beta needs to be "canceled out" since it quite variable but I haven't been able to do that.

    Does anyone know of a text book or other reference that demonstrates how to perform a circuit analysis of this or a similar circuit?

    Thanks in advance for any help provided.
  2. flat5

    Active Member

    Nov 13, 2008
    That's good value for money if the subject is new to you!

    Here is the amp.