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I have a Peavey Valve King 112. When I plug in my guitar I get nothing.The power light is on and the preamp is on as well.There is just silince.No humming or crackling.

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  • Scott Frye
    Scott Frye Oct 07, 2010

    HI....

    Do the 2 power tubes ( inside the cage) have the filaments lit up?
    Can you try another speaker on it?
    This model has some board mounted fuses too. which requires taking the amp out of the box

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This could be anything. You could try swapping the preamp tubes. If it were a power amp tube problem, it is likely the mains fuse would have blown, Since the pilot lamp is still on, we will assume that the problem is at the preamp level. This absence of signal can be caused by a dead tube, or more complexly, by a faulty resistor or capacitor in the signal path. If you can't resolve the problem by swapping preamp tubes with a known good one, you should take the amp to a tech experienced in servicing tube guitar amps. Any good tech should be able to sort this out within an hour of labor time. I doubt it will require any expensive parts. It may even be as simple as a loose/bad connection, either from manufacturing, or from normal use. Pro tube amps are subjected to levels of heat, vibration and electrical stresses that consumer electronic gear never sees.

Posted on Oct 07, 2010

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You would NOT use a stereo cable to plug in your guitar.

The stereo cable would carry the battery voltage back to the amp and MAYBE cause the fuse to blow.

You use a MONO instrument cable for your guitar.

The ring connection is use to complete the circuit to turn on the battery in most guitars.

Replace the fuse ONCE and get the proper instrument cable (NOT consumer audio cable) for your guitar.

If fuse blows again, take amp to shop for service.

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I hope this helps and if it does would you mind rating the solution. Thanks

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