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In Reply to: Choke power supplys in Comp Symmetry BJT power amps posted by grhughes on August 19, 2011 at 08:00:32:
A pair of big air-gapped chokes suitable for a SS amplifier will cost more than the power transformer. Other than that, it's a good idea.Regulating the low-current voltage-gain stages will give 95%+ of the benefit of a fully regulated supply, and at a fraction of the price.
An Electrocompaniet Ampliwire would be an example of this.
Some of the Nelson Pass DIY designs used small air-core chokes (2mH~3mH) in a Pi fiter to reduce HF noise. Some of his commercial designs use a CRC with an inrush current limiter (around 1Ω cold) as the R.
Edits: 08/19/11 08/19/11
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- RE: Choke power supplys in Comp Symmetry BJT power amps - djk 16:25:32 08/19/11 (0)
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