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Re: Mic Preamp [message #14439 is a reply to message #14433]

Mon, 17 September 2007 17:58

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

An AC power supply rectifies DC power from AC, so there is necessarily a filter. You'll have rectifier switcing artifacts and low frequency AC noise to deal with. A battery does not have these issues.

A battery has higher internal source impedance and has to be recharged or replaced, so those are the downsides to a battery. But it is pretty noise free and can be an attractive option, especially in a circuit like this that needs to be noise free and that has very low curent draw.

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[Message index]

		Mic Preamp By: Crystal on Mon, 10 September 2007 21:35
		Re: Mic Preamp By: Wayne Parham on Tue, 11 September 2007 08:08
		Re: Mic Preamp By: Crystal on Tue, 11 September 2007 12:25
		Re: Mic Preamp By: Wayne Parham on Wed, 12 September 2007 08:55
		Re: Mic Preamp By: willyable on Mon, 17 September 2007 12:46
		Re: Mic Preamp By: Wayne Parham on Mon, 17 September 2007 17:58
		Re: Mic Preamp By: Gilipsie on Tue, 25 September 2007 12:17
		Re: Mic Preamp By: sacback on Wed, 26 September 2007 12:24
		Re: Mic Preamp By: Gilipsie on Thu, 13 September 2007 12:57

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