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Old 25th June 2005, 12:51 PM   #1
Dr.Gone is offline Dr.Gone  Netherlands
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Question Aleph-X powersupply

Hello everybody,

I'm in the process of building me an class A Aleph-X amplifier and I am curious, does this design have any major flaws or weaknesses? I am not an expert at electronics (my father is more the electronics expert but has no experience with designing for audio purposes). However, after simulating some straightforward C and CLC approaches, we came up with this design which supposedly gives a lower ripple voltage than most other simulated designs while being cheaper (using less capacitors and no choke)

Some specifications:
  • The powersupply will power one channel
  • Running 20.9Volts at 6A with a 7 mV ripple
  • For the bridge a B700C35A (pdf) will be used not the 3N248 (used for simulation purposes only).
  • I want to use two 500VA torroids with 2x12Volt secondaries (each supplying 24Volts)

A few final notes:
In the simulation the bridge must supply more than the rated 35A a few times during startup, will this cause any major problems?
Oh and btw. attached to this message is the + side of the powersupply.
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Old 25th June 2005, 06:07 PM   #2
paulb is offline paulb  Canada
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Default Re: Aleph-X powersupply

Quote:
Originally posted by Dr.Gone
attached to this message is the + side of the powersupply.
Attachment? What attachment?
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Old 25th June 2005, 08:22 PM   #3
Dr.Gone is offline Dr.Gone  Netherlands
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this attachment...
Attached Images
File Type: gif powersupply.gif (7.7 KB, 515 views)
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Old 26th June 2005, 12:06 AM   #4
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Hi Dr.Gone

Looks like a capacitance multiplier. Have a look at Rod's site for more details.

http://sound.westhost.com/project15.htm
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Old 26th June 2005, 08:23 PM   #5
Dr.Gone is offline Dr.Gone  Netherlands
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Quote:
Hi Dr.Gone

Looks like a capacitance multiplier. Have a look at Rod's site for more details.

http://sound.westhost.com/project15.htm
Thanks for the reply:
knowing how the design is called, makes searching a lot easier.



Regards,
Jacco Flenter
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Old 18th July 2005, 03:15 PM   #6
lcleven is offline lcleven  Canada
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Default Capacitance multiplier versus CLC

Is a capacitance multiplier power supply as good as a CLC design. I am building an Aleph-X using dual +/- 15V CLC power supplies. The transformers are 300VA torroids with 12 volt secondaries. Each power suppliy rail has 27,000uf/ 1.5mH inductor/ 81,000uf. A local electronics designer told me it is a waste of money and that a capacitance multiplier is the way to go. Any comments?
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Old 18th July 2005, 05:15 PM   #7
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G... as in Gouda?

Nice town, live there myself and am planning on building the Aleph-x myself ! Small world !

Ralph
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Old 18th July 2005, 05:32 PM   #8
Dr.Gone is offline Dr.Gone  Netherlands
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Quote:
Originally posted by rwagter
G... as in Gouda?

Nice town, live there myself and am planning on building the Aleph-x myself ! Small world !

Ralph

Darn... you solved the riddle Were do you order your parts?
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Old 18th July 2005, 05:45 PM   #9
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Caps in Zoetermeer at audio dimension (post order) they're BG's, resistors at partsconnexion, Dale RN-60 (got 10-20 of each value, plaaning to match them) IRF044, got about 52 of them also planning to match, got them with a GP. Small stuff I buy at conrad or digikey.

You know it's hard even to find the right fuse in gouda even shack doesn't sell them anymore

Ralph

ps what heatsinks have you ordered and where?
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Old 18th July 2005, 06:30 PM   #10
Dr.Gone is offline Dr.Gone  Netherlands
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I've just ordered my heatsinks at Conradheatsinks, I hope they arrive this week. The prices at conrad were much more reasonable, than the Seifer heatsinks at Clofis (www.clofis.nl)www, but it was around 2.5x the price I needed to pay at conrad, and I still had to pick them up myself.

Nice list of components btw.
Personally I was not planning on using typical audio brand equipment accept mabye for the 220 uF capacitors, it would be interesting to hear the differences.
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