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Showing 1 of 291 conversations about:
Salaaran
23
Jan 26, 2018
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I have had my Little Dot +I for some months now, and I have noticed that it has started to develop a super strong electrical buzzing sound. The fist couple of months I had this amp there were no noise at all with the amp (that I noticed at least), but lately it has started to develop a buzzing sound, which I could removed by pressing down slightly on the frame or by moving the amp around a little. However, the issue has grown more persistent, meaning that the noise is only removed as long as I apply pressure on the frame of the amp, or if I adjust on one of the tubes (the one over the volume dial). Do anybody know how to fix this issue?
I should note that this buzzing is strong enough that it is an issue even if I were to listen to music on 80% volume.
CupcakeBattle
63
Jan 28, 2018
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Salaaranthe only solution I can think of is to try different tubes (maybe you got a bad one). if you used different tubes then make sure the jumpers are in the correct slot or try switching the gain switch. Other than that, could be an inssue with a part inside the amp that needs to be fixed then I would contact little dot.
Eli35
653
Jan 29, 2018
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SalaaranTry swapping your tubes, and if the problem moves to the other channel you know the problem it's in the tube. I had kinda same problem with my stock Valvo 6CQ6, where one of the tubes was resonating and caused a chime that was sooo anoying and the only way I could partially mitigate it was touching the tube. A cheap and dirty workaround I perfomed was putting some scotch tape that created a bond between both tubes & chassis, mitigating the "background ring", but it required adjustments every few hours, and looked horrible. Final solution was buying some tubes on eBay (Mullard M8161 & Voskhod 6ZH1P-EV, both amazing) and no more chimes. Price/performance, the Voskhod are amazing tubes and you can find them for around $15 with shipping. Mullard are also great, but cost almost twice, so it's up to you. For more info about tubes, read this: https://www.head-fi.org/threads/little-dot-tube-amps-vacuum-tube-rolling-guide.563884/
Salaaran
23
Jan 29, 2018
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Eli35Thanks for the great advise, it seems like the issue resides in that one channel rather than the tubes unfortunately. Though it is pretty difficult for me to gauge, but it seems like the short term "fix" is me adjusting how the right tube sits.
Cheers mate, and thanks you again for the advice!
Salaaran
23
Jan 29, 2018
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CupcakeBattleI'll have to give that a go some time soon, thanks for the advise! Just on a side note, you wouldn't happen to know where I would be able to contact little dot? Since the only thing I can find when I google them is a forum that I don't really know how to work, so I am having a bit of difficulties finding that information.
Again, thanks for the advise, cheers mate!
CupcakeBattle
63
Jan 29, 2018
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Salaaranon the user manual the only information is www.littledot.net which is the forum.
here's part of the page that might give some more insight. http://www.littledot.net/forum/viewtopic.php?f=3&t=597&sid=7d4ff8ad0856e8bc43c31841954347ec
here's part of the page that might give some more insight. http://www.littledot.net/forum/viewtopic.php?f=3&t=597&sid=7d4ff8ad0856e8bc43c31841954347ec
Eli35
653
Jan 30, 2018
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SalaaranMaybe you got a defective socket, if you can't contact Little Dot you could try changing it, it's an easy desolder-solder work. Or you could have a ground loop, did you tested it? An easy way to check: unplug the RCA cables when you hear the electrical buzz, and if it goes away, you know where the problem is. Good luck mate!
Atolah
4
Mar 20, 2018
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SalaaranI was able to eliminate my right channel hum with a ground loop isolator and turning my source down, turning down my source also gave me cleaner low end and for some reason more sub bass. I also noticed something like my phone does not have the hum and plugging it into an A/B switch gave it hum on both channels regardless of having a ground loop on the input or not... so far it has been a difficult amp to keep happy. Goodluck
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