Tick in a MesaBoogie Studio Preamp

J Hollenberg · From: Vlaardingen, The Netherlands

There is often (every 10/15 minutes ) a tick in the speaker of my Nashville 400.
It is not the amp, because I don't have the problem with the amp alone.A friend of mine has also a MesaBoogie and has the same problem.Is this a grounding problem????

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Rich Paton · From: Santa Maria, CA.,

J, I would check the preamp for DC leakage on its outputs. Use a VTVM or digital multimeter set to the DC millivolts function, with the volume & master controls all the way off.
If there's a slightly leaky cap in the circuitry, it can cause the exact problem you describe (and/or worse!)
Good Luck

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