“Help! My audio amplifier project makes a buzzing noise when I turn it on.” This is the most common question .Hi all, I found this forum via this thread forums solid power amp.html and read the linked thread as well. Now, here is my troubles the amplifiers hum a little bit with nothing connected, if I close their inputs to ground, the hum is gone. The hum gets worse, if I connect the amplifiers to .If you have built any audio gear in the past which has a power supply and help amplifier, buffer or control the audio signal, noise, in the form of Hum, Buzz or Hiss, can be an issue. You can add “crackle” and “pop” to the list of noises possible. We would all love to build gear with none of these “demons” .Of course, I can remove the ground wire from the IEC socket and eliminate the hum completely, but the prospect of doing CPR on oneself should anything go wrong is not really appealing. So the question to amp DIYers is this can ground loop hum be eliminated completely in DIY amps? I m not talking .This set of slides is the culmination of my experience over a period of about years building numerous power amplifiers and preamplifiers. When I first started out in audio about years ago as a teenager, some of my creations were reasonably quiet through pure luck and others hummed and hissed .Hi DIY gurus, Few years back I built a micro KGCA amp. The amp sounded excellent but it had a hum which was annoying so slowly I moved away from .Both the gain and the master volume knobs on the amp increase the hum volume. I ve tapped my tubes and I m not discerning any particular sound or noise, however, I have not swapped tubes. I don t see the point, as from RG s advice, if both volume knobs increase the hum volume, then the hum is coming .Problem solved. Most multimedia setups can be handled easily by a single amp circuit and most household circuits are at least that. no ground ebtech hum x. Ebtech. Ebtech s Hum X eliminates ground loop noise safely. There are also DIY solutions online that are less expensive if you have the skills..Use a scope to identify hum areas by connecting scope ground to different GND points and then measuring other GND points. A good starter is to connect scope GND to the PCB s GND star point and measure from there. Its amazing how simple thick tracks can still allow hum to appear. Also bear in mind that amplifier GND .These are the symptoms of a “ground loop” problem. The answer is usually simple, but WHICH answer can be difficult. A drawing of your setup will be very helpful. For now, we are hoping you have made a simple error, but we can t tell from reading words. We need a drawing..
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A deep humming sound emanating from your stereo’s speakers is in many cases the result of connection problems between your amplifier and .
I thought I would post this hoping it may be helpful to someone troubleshooting amp hum or buzz.I have a Belles A Reference amp. Amplifier Hum A Problem Solved..
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