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Popping and Crackling noise Intermitting


Posted on Monday, December 06, 2004 - 02:15 pm:   

I just got my MusicMan 210-HD 130 from the East Coast where I lived ...to California (like it matters...LOL) and the volume keeps going up and down and am getting a popping noise as it does... its like a volume pot is turned suddenly up or down... I turned the pots and dont see any change after it happens...love this amp on volume 3 or more... Tried the output tubes, no help, could it be the phaser tube? thanks

Oh, it was also happenning back east...
Posted on Monday, December 06, 2004 - 03:28 pm:   

I left the amp on a hour or two and the popping went away as did the volume flucs...210-HD 130

here is a sloppy recording of the amp...who needs a amp modleler?..

Posted on Monday, December 06, 2004 - 03:32 pm:   

oooops...the right link test tones
Steve Kennedy (admin)
Posted on Tuesday, December 14, 2004 - 05:26 pm:   

Popping and changes in volume can be anything from a tube to a cracked resistor to a leaky or noisy capacitor.

There isn't one answer. The fact that it goes away after several hours of heating suggests that it may be a resistor or capacitor that is at fault.

Once the problem disappears, can you make any of the symptoms reappear by vibrating or shocking the amp (lift a bottom corner an inch off the floor and drop it to create a physical shock)?


Posted on Saturday, December 18, 2004 - 12:37 pm:   

Steve, I had the amp shipped from the East to the West coast, as it was sitting for 2-3 years... The volume flux has goes away and has not re-appeared since i have been using it, i cant re-produce it unless i let it sit for a while...I may take it apart and do a visual on all the solder joints and resistors caps componets...and clean the pots to boot...thanks