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- Feb 14, 2017
- 5
- Joined
- Feb 14, 2017
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The question:
How do I make this 200Khz huming sound go away?
More info:
I could use some help. Saw a YouTube video of a guy making a independant bluetooth speaker/bombox. It has a 3000mah battery at 12v. It uses a cheap chineese USB bluetooth reciver. I purchaced a AMP that supportes 2x15Watts.
In the video he makes the stereo signal into mono using resistors, but I did this using two capasators, works fine.
He used this dubble amplifying trick, where he runs the mono signal through the AMP twice. I did this, but found out that a ground loop isolater was needed for this to work.
About the problem:
When the signal goes out of the amplifier it gets a humming noice. My teacher used the ocyloscope to find out that the huming/buzz had a frequenzy of 200KHz. I tried using a ground loop isolater between the speaker and amplifier, but then it just mad this loud banging sound.
So I want to remove this huming.
So again:
How do I make this 200Khz huming sound go away?
(It is at 2v if it matters)
How do I make this 200Khz huming sound go away?
More info:
I could use some help. Saw a YouTube video of a guy making a independant bluetooth speaker/bombox. It has a 3000mah battery at 12v. It uses a cheap chineese USB bluetooth reciver. I purchaced a AMP that supportes 2x15Watts.
In the video he makes the stereo signal into mono using resistors, but I did this using two capasators, works fine.
He used this dubble amplifying trick, where he runs the mono signal through the AMP twice. I did this, but found out that a ground loop isolater was needed for this to work.
About the problem:
When the signal goes out of the amplifier it gets a humming noice. My teacher used the ocyloscope to find out that the huming/buzz had a frequenzy of 200KHz. I tried using a ground loop isolater between the speaker and amplifier, but then it just mad this loud banging sound.
So I want to remove this huming.
So again:
How do I make this 200Khz huming sound go away?
(It is at 2v if it matters)