| hhocean |
Hello
I want to build a Zen AMP, but I don't know how many current is the power at least to offer. Can anyone give me a suggest?
Thank you. |
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| Orgonom |
I think - - - it`s limited only by your own madness!!!
:redhot: |
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| Netlist |
If I understand you correctly you want to know the VA rating of the power transformer of the original Zen.
According to the article at passdiy.com, it should be 720Watts minimum for both channels.
http://www.passdiy.com/projects/zenlite5.htm
/Hugo :) |
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| hhocean |
thank you for reply.
but I just want to build a 10W output Zen AMP,
I found a article for this amp
(http://cygnus.ipal.org/mirror/www.p....com/zenamp.htm)
In this article mentioned the transform need 24-25V AC @ 5A secondaries.
I very doubt a 10W amp really need a 5A transform?
Can give me more information for Zen AMP?
Thank you. |
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| Netlist |
Because all Zen amps are classA they consume a lot of energy.
Efficiency is at best 50% with an Aleph current source found in Zen v2 article.
Go to www.passdiy.com/amps.htm and start reading at the bottom with "Zen Variations - Part 1: Zen-lightenment" and "Zen Variations - Part 2: The Penultimate Zen's Current Source", which will cover most of your questions.
/Hugo :) |
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| joensd |
| quote: | | The power transformer should source about 25 volts AC at 6 amps or so for each channel. While the actual DC draw is exactly 2 amps per channel, the power factor created by charging the power supply capacitors results in transformer dissipation greater than suggested by the 2 amps. |
What exactly is difficult for you to understand?
25VAC*6A per channel so
25VAC*12A=300VA (or bigger of course).
You might easily be fooled to think that one 6A transformer would be enough. Well try it (not for too long though) but donīt touch the transformer. :hot:
greets |
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