Question about Amplifiers & Preamps

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Preamp Noise My Audio Buddy Preamp is hissing and crackling. One input is not working at all. The recording channel levels on my software are going sky high even without anything plugged into the preamp. Through a process of elimination I have worked out the cables etc are OK. Please advise if it is repairable and if so, an estimate of cost would be great. Thanks

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  • KenO2 Jul 20, 2008

    Hi!

    All I can see inside is soldered to the circuit board. Nothing i can see is removable. Please explain what 'tube' is and what I am looking for.

    Thanks!


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The rectifier is the only thing wrong with the amp. Typically a bad rectifier will pop fuses but that is not the only thing than can cause that. You could try pulling tubes to see if you could isolate the problem. Just be careful if you haven't even taken the tubes out before, those PCB sockets are kind of flimsy. pull one tube at a time and see in the crackling goes away

Posted on Jul 20, 2008

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"PHONO" is the only designated connection on an audio device that is literal and exclusive. Nothing but PHONO will work right on it and old-school turntables would require it to preamplify the tiny current produced by a Phono cartridge.

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Swap the Left and Right channel cables between preamp and the amp with each other.

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Hi KenO2

First thing to check is that the phantom power is not turned on. If you are using a condenser mic, then it should. If you are using dynamic mic, then it will crackle and makes weird noises in the manner you describe. Other than that it sounds like you have a failing op amp in your preamp. This sort of repair work is not expensive(with respect to the outcome). I would anticipate $40-60 to fix it. Trouble is you can replace it super cheap at the moment 45% off for $64.95plus $9.95 shipping from zzsounds

So I guess that it may not be worth repairing, and more a replacement item for that money. If you have a mate with electronics experience, you could just replace the opamps at home for $10 worth of parts.

If you think my advice helped you to work out what to do, a FixYa rating would be great. Cheers

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