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Old 15th November 2006, 01:40 PM   #1
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Default Zen ZV9 power supply

What is the best way to feed the Zen ZV9?? Has anyone a schematic or a PCB to suggest?? Please help me!!
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Old 15th November 2006, 04:33 PM   #2
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Albertone,

look at the manual of similar Class A amplifiers, example Zen Amp

http://www.passdiy.com/pdf/zenamp.pdf

1 AC connector, a fuse, a transfo {3* times power used!}
choice of 1 or 2 secondaries {1 for each channel is better...}

100 watts for each channel, so: 250 to 300VA for each channel
that's a 300VA, for a monobloc or only 1 * 625VA for a stereo 2 channel

To get 50 volts DC : secondary(s) must provide: 36 volts AC on load to the bridge

And for each channel:
a bridge rectifier 25A/100volts
several capacitors, example 2*10 000microF

Perhaps a fuse for each channel DC, would be safe to protect the bridge(s) and transfo...

Alain.
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Old 6th December 2006, 08:56 PM   #3
sts9fan is offline sts9fan  United States
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Can someone tell me if this transformer will work for this project?

http://www.partsexpress.com/pe/showd...number=122-650

Also I am new at this and a bit confused on how to pick a transformer based on a schematic, If someone could lead me to some guidelines that would be sweet.

Kris
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Old 6th December 2006, 09:16 PM   #4
VT67 is offline VT67  Belgium
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sts9fan

Alain summed it up quite nicely.
Yes that transformer will work with the secondaries wired in parallel. You will end up with a rail voltage somewhere between 46 and 49VDC. One of those per channel is also my advice.

Regards
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Old 6th December 2006, 09:20 PM   #5
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Kris,

Good choice, this will give you about 49 to 50 volts DC at 2 Amps for each secondary.
You will need 1 for each channel monobloc,
and you put the secondaries in // {parallel}.

regards.

Alain.
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Old 7th December 2006, 02:13 PM   #6
sts9fan is offline sts9fan  United States
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Thanks for the help guys
I would assume that the AN 3236 would work also
http://www.toroid-transformer.com/
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Old 7th December 2006, 02:30 PM   #7
VT67 is offline VT67  Belgium
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Quote:
I would assume that the AN 3236 would work also
Yes. You could also use the AN 3218 with the secondaries wired in series.

Regards
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Old 7th December 2006, 02:33 PM   #8
sts9fan is offline sts9fan  United States
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Is there somewhere I can read about the secondaries of these transformers? I am confused about the differnet configurations and why some would be wires in series and the other in parallel
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Old 7th December 2006, 02:34 PM   #9
steenoe is offline steenoe  Denmark
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Quote:
You could also use the AN 3218 with the secondaries wired in series.
I will second that, as an even better choice. It will give you more possibillity's later on. Most of the Passdiy amps can be made with 2x18V secondaries.

Steen
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Old 7th December 2006, 02:39 PM   #10
steenoe is offline steenoe  Denmark
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Here is a nice place to start. Just go down the page untill you see the Transformer articles. All the other stuff is also worth reading.
http://sound.westhost.com/articles.htm

Steen
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