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Post subject: Blues Deluxe is making a thumping sound
Posted: Wed Mar 13, 2013 10:17 am
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Joined: Wed Mar 13, 2013 10:14 am
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Hi, my name is Jack S and I am new to this forum, but need some advice about a problem that has arisen with my amp.

My Blues Deluxe III amp has started making a steady thump sound. The guitar playing through it sounds right and unchanged in tone, but it will sometimes start a pulsing thump. So far, I have been successful stopping it by powering off for a minute and powering back up, but it has happened twice now and I need to get it fixed quick. The first time it happened I figured it was something from the club that was causing an oscillation of some kind that I was picking up through the amp, but the next time I used the amp at another club it happened again making me believe there is something going out in the amp itself.

Any ideas what would cause this? Is it as simple as looking for a faulty tube or is there another component that is likely to be at fault?


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Post subject: Re: Blues Deluxe is making a thumping sound
Posted: Wed Mar 13, 2013 3:14 pm
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Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
A hum ?

Is it on waranty ? if yes bring back to the store.

Could be a tube or bad connexion / solder inside the amp.


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Post subject: Re: Blues Deluxe is making a thumping sound
Posted: Thu Mar 14, 2013 10:10 pm
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Rock Star
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Joined: Mon Apr 05, 2010 2:37 pm
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Location: Natural Bridge, Virginia
Steady thumping noise could be "motorboating" which could mean a bad power supply cap or interstage coupling cap.

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