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Old 10th June 2011, 01:56 PM   #1
Join Date: Nov 2006
Location: Torpoint
Default High Current Class A Amplifier Supply

I'm building a Nelson Pass Aleph 4 Class A Amplifer.

It uses a 40-0-40 VDC + 6A Power Supply per channel.

Using 500VA transformers and 50A Bridges, I have the components for two completely separate power supplies.

I have:
12 x 33000uF Computer Grade Caps.
4 x 22mH 15A Air Cored Inductors
4 x 0R47 25W Resistors.

It is intended to uses 3 x 33000uF capacitors per supply:
LEFT +ve
LEFT -ve

Question is, What is the best combination of C, R and L for this supply.

Previously the same capacitors worked beautifully as CCC (no R or L)

I'm guessing at CRCLC but I need someone with some SPICE experience to comment on how best to use the components avaialble.
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Old 10th June 2011, 05:50 PM   #2
Join Date: Nov 2006
Location: Torpoint
Within the limits of PSU2 that I could use, it would appear that CLCC is the best option.

Unfortunately the simulation just says that the diodes will blow, not surprising when I can only specify 1N5400s. I'm using 50A bridges.
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Old 10th June 2011, 06:57 PM   #3
Join Date: Nov 2006
Location: Torpoint
PSU2 is useless. It will not allow the specification of 35A diode bridge.
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Old 10th June 2011, 07:49 PM   #4
diyAudio Member
Join Date: Nov 2008
Location: Oakmont PA
Best is likely CLCRC 22mH is just an RF filter. Put a .1 uf after it. Lowest hum is LCRCC. Maximum current out of the transformers will not blow a 50A bridge. Internal resistance of the C is the unknown factor.
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