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Post by i9b on May 29, 2006 7:04:51 GMT -7
since i have brought the MAZ Jr home from the store there has been a lingering sizzling / sparking buzz of a tone that hangs on when the note is completed. it's a low volume osund. happens most of the time. have tried pushing the tubes up into their holders, as suggested by the salesman when i checked back in with him. didn't seem to help - but maybe i'm too timid with how i did that?? anyway looking for suggestions that might avoid the 4 hour drive to the dealer.
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Post by ke4unr on May 29, 2006 9:58:47 GMT -7
since i have brought the MAZ Jr home from the store there has been a lingering sizzling / sparking buzz of a tone that hangs on when the note is completed. it's a low volume osund. happens most of the time. have tried pushing the tubes up into their holders, as suggested by the salesman when i checked back in with him. didn't seem to help - but maybe i'm too timid with how i did that?? anyway looking for suggestions that might avoid the 4 hour drive to the dealer. Don't get too discouraged yet. It may be the tubes or the chassis being a bit loose. To make it easier, I'd suggest laying the amp face down. On a clean surface, of course. See if the bases of all the tubes are snug with the tube sockets. Use a small flashlight if needed, and it won't hurt to give them a bit of a push just to make sure they are seated well. If everything looks OK, then it may be a tube itself that is rattling. You'll need to pull each one and as you do put it close to your ear and give it a little bit of a shake. Not too much, but just enough to see if you hear any rattle type of noise. Yes, this is very similar to a light bulb. I'd suggest starting with your power tubes, then the rectifier and finally the preamp and PI tubes. If you happen to have spare tubes, try substituting one for one. Then play the amp and see if the noise you are hearing now goes away. No need to be too interested in the tone, just as long as the tubes function. Even if the tubes all check out fine, take a phillips screwdriver and tighten the chassis mounting screws. Dr. Z has a post somewhere about this. It is something you'll probably want to do as normal maintenance about once a year. I hope this helps. Just to let you know, my new Maz Jr came with a rectifier tube that had a rattle. Let us know what you find out. Ray K.
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Post by mikefleming on May 29, 2006 10:07:58 GMT -7
I have one more thing for you to check -- the handle. when I got mine it there was a rattle/buzz I couldn't get rid of no matter how hard I tried, chassis screws, tubes, speakers. The handle was the last thing I checked and it turned out one of the mounting screws was a little loose.
Mike
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Post by oldgoat on May 30, 2006 19:58:39 GMT -7
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Post by i9b on Jun 1, 2006 9:25:27 GMT -7
i found the culprit!! thank you for your suggestions. the power tubes have a delicate wire 'holder' or bracket that goes around them, and one of those has shifted and was leaning against the tube. i moved it slightly. noise problem gone.
i did check all other tubes for proper contact in sockets, as suggested, but i think it was the bracket touching the tube that had been the issue.
thanks for your help. paul
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Post by ke4unr on Jun 1, 2006 11:50:34 GMT -7
i found the culprit!! thank you for your suggestions. the power tubes have a delicate wire 'holder' or bracket that goes around them, and one of those has shifted and was leaning against the tube. i moved it slightly. noise problem gone. i did check all other tubes for proper contact in sockets, as suggested, but i think it was the bracket touching the tube that had been the issue. thanks for your help. paul Way to go, Paul! Now you can get back to concentrating only on the great tone. +1 coming your way. Ray K.
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Post by amakitalo on Jun 26, 2006 10:01:06 GMT -7
There have been several posts on different unwanted sounds from Maz Jr's. Finally “fixed” a couple of rattling noise problems in my Maz Jr 2X10 combo. I’ve had my Maz now for about year and a half. I’ve experience some unwanted noise when playing louder. You couldn’t here the noise in a live playing situation, but in practise or recording situations it was enough to drive me up the wall.
I had two kinds of rattles. One was the kind best described as a higher pitch mechanical noise sounding like tube filament noise but louder. The other was a lower noise akin to a low rumble like something was loose in the speaker area.
I thought the first noise was the power tubes rattling, so I kept trying different kinds of tubes, bought those silicon tuber rings etc. No help. As for other mechanical reasons, I tightened everything there was to tighten under the chassis, baffle board, reverb tank you name it, but the noise was still there. As for the lower sounding noise, it was the same. Nothing seemed to make a difference.
This weekend I pulled the aluminium chassis, where all the wiring is, out of the amp thinking that there must be something in there that causes the higher pitched mechanical noise. First, a disappointment, as there was pretty much nothing there to tighten, except for four small screws, two on each side of the chassis. All the other screws etc. were on the bottom of the chassis. However, all these 4 screws were loose, not so that things would fall off, but loose enough that I was sure they were causing the rattle. Tightened the screws and the rattle is totally gone! No tube filament noise, no nothing.
A for the lower rumbling kind of rattle. When I removed the chassis, I noticed that on about the half of the plastic panel glued on the back of the chassis (where serial number etc are) the glue wasn’t holding the panel any more and the plastic was loose. Any time I played the amp louder the plastic started vibrating and caused the low end “rumble”.
I don’t expect others to have necessary similar problems; however, I posted this in case you have. The answer is out there….
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Post by billyguitar on Jun 26, 2006 12:45:19 GMT -7
"lingering annoying tone"; Isn't that a typical Saturday afternoon sound at any Guitar Center?
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