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Transistor Cross

Discussion in 'General Electronics' started by Kjoseph621, Jul 4, 2003.

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  1. Kjoseph621

    Kjoseph621 Guest

    I am trying to find a replacement transistor for some equipment built in the
    early 1970's. It is a small transistor with the numbers X16A 5332. This was
    used in a circuit that generated crowd like noise for an arcade baseball game.
    Any help in what would work in it's place would be greatly appreciated. Thank
    you. Joe
  2. Robert Baer

    Robert Baer Guest

    A zener run at low current (say 100uA) would make an excellent noise
    Transistors have never been made to specifically generate noise, and
    (usually) only RF transistors have a noise spec to indicate how low
    their noise is in Rf amplifier circuits.
    If it is an NPN, then any other NPN will do; similarly for PNP.
    However, if it is a Germanium transistor, replacement with a Silicon
    transistor might require biasing adjustment - most especially in a
    direct-coupled amplifier circuit.
    The NTE cross-reference catalog #9 does not list it; a 5332 crosses to
    a zener diode.
  3. DarkMatter

    DarkMatter Guest

    Actually, I think the noise was digital, and stored in a ROM on the
    board. The chip is an audio output driver. It is a Q-MOS switch
    driver. With digital pulses, it would put out fine juice for a
    speaker. Most any video game I ever saw used digital sound. One
    could always hear the ringing from the non sinusoidal waveforms.

    Anyway, that MAY be the chip. Seems to be it.
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