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studiomaster powerhouse Horizon schematics

Discussion in 'Electronic Repair' started by GEOFFOS., Oct 12, 2013.

  1. GEOFFOS.

    GEOFFOS. Guest

    I have a POWERHOUSE HORIZON 1208. and channel 1 has a lot of 'white
    noise,'worse when advancing the 'gain control. I have tried replacing the
    op-amp BA4560 the one nearest the Mic input channel 1. My problem is I cannot
    identify the 2 transistors at the Mic gain control, think they are PNP low
    noise devices BF A126B? but not found anywhere when searching from Google. The
    other transistors are easily available: type BC549C. Is there anyone who
    would know what type of Transistors these are or an equivalent?

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  2. Phil Allison

    Phil Allison Guest

    "GEOFFOS."

    ** Studiomaster commonly used 2N4403s at the mic input.



    ..... Phil
     
  3. N_Cook

    N_Cook Guest

    Try 2SA126B
     
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