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Old 13th June 2009, 08:13 PM   #11
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Here for the guys who can not wait:

http://www.pingbattery.com/servlet/t...LiFePO4/Detail
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Old 13th June 2009, 09:10 PM   #12
Magura is offline Magura  Denmark
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Quote:
Originally posted by Jean-Paul_2
... the partlist, stereo.

I like:
- Mundorf capacitors,
- PRP resistors.

The batterie design with charger coming soon (starting wenesday).

If you really wanna spend that kind of money on caps, I suggest you look elsewhere than Mundorf. There are quite a few better industrial caps out there.


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Old 14th June 2009, 09:33 AM   #13
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thanks Magura, and there are?
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Old 14th June 2009, 10:31 AM   #14
Magura is offline Magura  Denmark
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Vishay makes some pretty neat naked film caps, Wima, and Rifa makes some hefty film caps as well.
At any rate, you'll have a hard time not getting more for your money from any of the above mentioned, than from Mundorf.

Pic is an example of the Vishay naked PP film caps I recently bought, 164uF 500V.

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Old 14th June 2009, 10:50 AM   #15
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The circuite and parts list you have is for a ZEN amplifier not
a SOZ amplifier. And why not build a later version of the ZEN
they are suposed to be much better?
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Old 14th June 2009, 10:53 AM   #16
Magura is offline Magura  Denmark
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Quote:
Originally posted by woody
The circuite and parts list you have is for a ZEN amplifier not
a SOZ amplifier. And why not build a later version of the ZEN
they are suposed to be much better?

Hey good catch Woody.

...but the original Zen is a good learning experience, coupled with a sound that some people actually like a lot.


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Old 14th June 2009, 11:00 AM   #17
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Hello Jean-Paul,
Nice project! A question though:
You have choosen gain to be x1(1k/1k). If this is your intention, why not go for a source-follower instead? Same gain and high Zin.
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Old 14th June 2009, 11:34 AM   #18
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All this supposition...

This amplifier is my first project with semiconductors. My preference are tubes. But only bad guys never change the opinion.

And thanks, I know that other parts can be used. I know WIMA, and take a look a the new products. Big film capacitors with very good specifications.

I will built this one, SOZ or ZEN, I donīt care. Do the measurements and my comments.
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Old 21st June 2009, 10:21 AM   #19
jkeny is offline jkeny  Ireland
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Jean-Paul,
I too am about to use these LiFePO4 batteries but to power a DAC - I believe that they will be wonderful powering your preamp. I'm interested in your charger schematic.
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Old 21st June 2009, 01:25 PM   #20
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Hi Keny,

next week, we start the braining:
- LTC balancing up to 1000VDC,
- and specific charger for 1 to N batteries.

What is the supply voltage of the preamp?
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