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Peavey UA 35T II basic operation.

Discussion in 'Electronic Repair' started by David Farber, Jun 4, 2007.

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  1. David Farber

    David Farber Guest

    I am servicing a Peavey UA 35T II paging amplifier. The complaint is that
    intermittently the mic input goes dead. I swapped out mic's but still the
    same problem exists. There is a switch on the amp that according to the
    owner's manual operates like this:

    "Selects between mic and page input. The page selection
    provides internal pad, converting this input to line level for page

    What exactly does this mean? You can have a look at the manual here:

    Thanks for your reply.
  2. Meat Plow

    Meat Plow Guest

    Means the amp can be fed signal from a console that has line out (much
    higher signal than the output of a mic)

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  3. David Farber

    David Farber Guest

    Ok, so the switch is just an input attenuator.

    Here is something from a review I read about this amp:

    "When a signal is present at the mix/page input, the AUX input is muted.
    This feature is internally defeated when required."

    I am finding that when I hook a signal into the AUX input, it is not muted
    when you speak into the mic. You can hear both mic and AUX input at the same
    time. Does this seem correct? What is meant by, "This feature is internally
    defeated when required?" I don't see any switches other than the attenuator
    switch. Although there is nothing hooked up to AUX input in the application
    in which it's being used, I'm wondering if the muting circuit is acting up.

    Thanks for your reply.
  4. Meat Plow

    Meat Plow Guest

    The switch or jumper would be inside.
    The AUX input would be for music (like Muzak). That's why it would be
    muted when a page is going out.
  5. David Farber

    David Farber Guest

    I don't see any jumper or switch unless the attenuator switch serves two
    purposes. But in either position, the AUX input is not muted. It's just
    mixing the two signals together. I left a message with Peavey tech support a
    couple days ago but have not heard back yet.

    Thanks for your reply.
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