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DT25 112 Combo....HUGE Electrical Noise...Any Ideas?...

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Just received a new DT25 112 Combo amp and having issues. 

 

There's a very high/noticeable amount of electrical noise using this amp in ANY setting (any dial...i.e. drive, presence, volume, master, class A/AB, pentode/Triode, etc).  The electrical noise only quiets down when you reduce the volume to too low a volume. 

 

Already at 10 o'clock dial setting the noise is marked....and every setting in the recommended Voice plastic cutout sheet that came with the amp is noisey as hell.  Overdrive is a joke in noisiness.  Cleans should be silent and aren't.

 

Power cord is in a balanced electrical outlet and cables are shielded.

 

I've had tube amps before in same wall socket/cables and none were as electrically noisey as this unit. It's deal breaking annoying.

 

 

MY GUESS:

1.)  Bad tubes

2.)  Broken unit  (i.e. needs servicing)

 

 

Any advice?.....

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My #1 suspect in this case would be one or more tubes.  It's possible that one might not be seated well after shipping.

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Just received a new DT25 112 Combo amp and having issues. 

 

There's a very high/noticeable amount of electrical noise using this amp in ANY setting (any dial...i.e. drive, presence, volume, master, class A/AB, pentode/Triode, etc).  The electrical noise only quiets down when you reduce the volume to too low a volume. 

 

Already at 10 o'clock dial setting the noise is marked....and every setting in the recommended Voice plastic cutout sheet that came with the amp is noisey as hell.  Overdrive is a joke in noisiness.  Cleans should be silent and aren't.

 

Power cord is in a balanced electrical outlet and cables are shielded.

 

I've had tube amps before in same wall socket/cables and none were as electrically noisey as this unit. It's deal breaking annoying.

 

 

MY GUESS:

1.)  Bad tubes

2.)  Broken unit  (i.e. needs servicing)

 

 

Any advice?..

 

 

Maybe you should do a support ticket if it's new.

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MY GUESS:

1.)  Bad tubes

2.)  Broken unit  (i.e. needs servicing)

 

 

Any advice?.....

 

Is it hum or fizz?

 

hum:

1. earth loop

2. bad insulation

 

fizz:

1. bad grounding on your guitar

2. bad cable

 

plus your ideas.

 

To try to isolate the problem I would (maybe you have already done this):

1. try another cable

2. try another guitar

3. try nothing plugged in and turn the amp up. See if the buzz is still there with no input signal

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