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Post subject: New 65 Twin Reverb Issue
Posted: Thu Jul 20, 2017 7:08 am
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Hobbyist
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Joined: Thu Jul 20, 2017 6:54 am
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I have a two-day old amp and noticed that with the volume on my Strat set to 4 and the volume on the vibrato channel set to roughly 3 1/2 there is a noticeable hum being generated. Upping the amp volume to 5 that hum can be heard throughout the house. Is this normal for tube amps? Granted the with the amp set at 3 1/2, turning the Strat up to 7 to 10 produces huge sound, but I am concerned that I may be dealing with a defective amp.


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Post subject: Re: New 65 Twin Reverb Issue
Posted: Tue Jul 25, 2017 3:23 am
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Rock Icon
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Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
With no guitar plug , how is the hum ?


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Post subject: Re: New 65 Twin Reverb Issue
Posted: Sun Jul 30, 2017 11:41 am
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Aspiring Musician
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Joined: Tue Jul 17, 2012 5:43 pm
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Location: Here In Oregon
Probably a bad tube and the story of my life. Any dimmer switches on, they are notorious for creating hum? Also possibly an AC ground-fault hum. Might try plugging into different AC outlets on different circuits and also check using different pickups on your guitar or another guitar if you have one.

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Post subject: Re: New 65 Twin Reverb Issue
Posted: Sun Jul 30, 2017 5:15 pm
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Roadie
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Joined: Sat Dec 13, 2014 7:34 am
Posts: 245
I've had many people say "my amp started humming" and 90% of the time it's the guitar. (Especially if they're facing the amp like most people do when they get a new amp) You HAVE to check it without anything plugged in. It won't hurt your amp a bit.

UN


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