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Caps going out?? Whats this noise...

I just realized that I have some serious white noise similar to the noise you get when listening to the radio in between stations. The noise only comes from one channel, and only when my passive pre amp is turned off and my amp is still on. The noise is there with only my speakers and power cord connected to the amp (disconnected the rca's to try to locate where the white noise is coming from. Again, there is no noise when the pre amp is also turned on...
b_limo

Showing 1 response by georgehifi

georgehifi's avatar
georgehifi
10,312 posts
 
Just to give all an idea of what goes on when the Lightspeed Attenuator has no power connected, the amps inputs will see an open circuit.
I think that one of the channels of the amp is not quite behaving itself when it sees this open circuit and goes noisy.
Which to me says it could be the input loading resistor to ground has gone open circuit, and the base of the input transistor/s is/are seeing the universe, no big deal as when the Lightspeed is powered up it becomes the input loading resistor anyway, which will be lower than the one in the amp.

Cheers George
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