Class A amplifier question

Discussion in 'General Electronics Chat' started by Adriara, Feb 18, 2011.

  1. Adriara

    Thread Starter New Member

    Feb 18, 2011
    Hello ,
    I am working on a class A amp ( MC7300 ). The left channel is warmer than the right one.All voltages on the final transistors are very much alike on both channels . I changed all finals and the pre-finals on both positive and negative heatsinks and got a much beter thermal behaviour ( it is heating much less ) , however it is still warmer than the right channel. I also matched the new transistors regarding theit Hfe.
    Could somebody , please , give me an idea on what to do next ? Or if i need to do other check ups on the transistors ?

    Thank you very much .