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RE: Noise is bad-LT1083 100VA

Lt 108xs are very old hat when it comes to regulation but [are] cheap and easy.

The LT108x regulators are indeed cheap and easy but, as John Swenson has pointed out elsewhere, if you use well designed L-C filtering up front to take care of higher frequency noise, the likes of the LT108x are perfectly adequate.

This seems to be the case here: ". . . passive means are the only way to give good filtration and low output impedance." Designing such is not fiendish but it does need competent component selection and doesn't come cheap.

Having DIY'd several C-L-C PSUs to John's design, I can confirm they work very well indeed. I've even tried fancy regulators in place of the specified LT1084 but found they made little, if any, difference. I suspect these are good products.

Are they good value? Lucy is looking a little coy.

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  Atma-Sphere Music Systems, Inc.  

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