Opera Consonance M500 mkii

Pahstv · 14th January 2011, 09:48 PM

Gents,

Need some help/advice.....

Have just received a set of above tube amps and was really happy until i noticed a slight hum from both amps (both of them) and the speakers.

At normal listing level it is not noticable, but I know it is there which is a pain...

Without the tubes there is only a very very slight hum from the amps (transformers i assume) which increase graduently as i install the tubes.

Any ideas on what i can do to overcome this issue? Previous owner claims the amps have benn running for approx. 100 hours.

Brgds

Peter

singa · 15th January 2011, 11:21 AM

Hi, this is usually a grounding problem that is the amp has aged and
ground wires attached by eyelets with screws to chasis and similar
wiring and solder joints.Inspect them carefully for bad joints and loose parts.
Hope this helps.

14th January 2011, 09:48 PM	#1
Pahstv diyAudio Member Join Date: Jan 2011	Opera Consonance M500 mkii Gents, Need some help/advice..... Have just received a set of above tube amps and was really happy until i noticed a slight hum from both amps (both of them) and the speakers. At normal listing level it is not noticable, but I know it is there which is a pain... Without the tubes there is only a very very slight hum from the amps (transformers i assume) which increase graduently as i install the tubes. Any ideas on what i can do to overcome this issue? Previous owner claims the amps have benn running for approx. 100 hours. Brgds Peter

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15th January 2011, 11:21 AM	#2
singa diyAudio Member Join Date: Apr 2004 Location: near	Hi, this is usually a grounding problem that is the amp has aged and ground wires attached by eyelets with screws to chasis and similar wiring and solder joints.Inspect them carefully for bad joints and loose parts. Hope this helps.