I constructed a LM1875 kit from chipamp.com. I assembled and tested it per the instuctions listed here on DIYAudio.com.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=122793
The PSU tests OK, correct DC voltage. I measure NO DC-offset at the amp output. When connected to my system it produces only a loud hum and no music. I've checked everything I can think of, but find no discrpencies between the as-assembled amp and the instructions.
Anyone have any suggestions? Further testing I should do?
Thanks,
http://www.diyaudio.com/forums/showthread.php?s=&threadid=122793
The PSU tests OK, correct DC voltage. I measure NO DC-offset at the amp output. When connected to my system it produces only a loud hum and no music. I've checked everything I can think of, but find no discrpencies between the as-assembled amp and the instructions.
Anyone have any suggestions? Further testing I should do?
Thanks,
pclements said:I constructed a LM1875 kit from chipamp.com. I assembled and tested it per the instuctions listed here on DIYAudio.com.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=122793
The PSU tests OK, correct DC voltage. I measure NO DC-offset at the amp output. When connected to my system it produces only a loud hum and no music. I've checked everything I can think of, but find no discrpencies between the as-assembled amp and the instructions.
Anyone have any suggestions? Further testing I should do?
Thanks,
I have same problem :/
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