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Curious question. I just purchased a new Fender Blues Junior on Friday. It has been making a sputtering, crackling noise ever since I got it home. It does it even with nothing plugged into the input jack. Just wondering if this might be a bad tube or something else. Thanks for your help.

sometimes you can isolate trouble spots by pulling the preamp tubes one at a time
if you find the right one, the noise will stop - if not, put it back in, and move to the next tube

sometimes, you can tap very lightly on a tube with either a fingernail or chopstick instead, but use caution

it may just be a tube, but if replacing the tube in the problem area with a known good tube doesn't stop the noise, then it's something else in that part of the circuit

Thanks Curly!


Originally Posted by Curlysometimes you can isolate trouble spots by pulling the preamp tubes one at a time
if you find the right one, the noise will stop - if not, put it back in, and move to the next tube

Do you mean pulling or replacing? Pullling a tube will stop the signal along with noise.


Originally Posted by alecleeDo you mean pulling or replacing? Pullling a tube will stop the signal along with noise.

if you happen to have Gerald Weber's first book, check page 128

Do what Curly said, but if it's anything beyond a tube problem......you bought it new, right? Many big stores have their own return/exchange policy for 10 or 30 days, so act quickly.

Thanks again guys. I think I'll just be swapping it for another one this weekend.