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Zion, a ready made Phono Stage by the Paradise team
Zion, a ready made Phono Stage by the Paradise team
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Old 6th May 2014, 04:15 AM   #11
metallicus69 is offline metallicus69  Netherlands
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Great ideas! following...
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Old 27th December 2014, 05:05 PM   #12
ponger is offline ponger  United States
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Hello Mr. Gerard,

I know that you're very busy, but I was wondering if you were still planning on making the Zion?

Thank you,

Ponger
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Old 29th December 2014, 11:31 AM   #13
Joachim Gerhard is offline Joachim Gerhard  Germany
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At this moment the project is on hold.
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Old 30th December 2014, 03:37 PM   #14
ponger is offline ponger  United States
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Thank you for the update. I look forward to when you can continue the project.

Ponger
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Old 4th November 2015, 02:05 PM   #15
sq225917 is offline sq225917  United Kingdom
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Still on holds gents?
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Old 18th September 2016, 05:54 PM   #16
Joachim Gerhard is offline Joachim Gerhard  Germany
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Frans and i have made an input stage. It is more or less a combination of what we learned.
It is differential in - differential out so that allows for balanced operation. It is DC coupled.
It is low noise without paralleling many transistors. It is conceptionally simple but high performance. I build a prototype today and i am impressed. I show you pictures and more data soon.
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Old 18th September 2016, 06:58 PM   #17
Joachim Gerhard is offline Joachim Gerhard  Germany
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Here is a sinewave and a 10kHz square. Open loop bandwidth is 210kHz ( -3dB ), open loop differential gain is around 800 x.
The circuit is thermally stable and has no overshot without compensation. I am impressed how close this build came to the simulation.
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File Type: jpg Zion Sine.jpg (141.5 KB, 845 views)
File Type: jpg Zion square.jpg (139.9 KB, 836 views)
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Old 18th September 2016, 07:01 PM   #18
Joachim Gerhard is offline Joachim Gerhard  Germany
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Here is a first circuit diagram. Do not build it yet or be experimental.
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File Type: pdf Zion 4th Draft With RIAA.PDF (202.2 KB, 524 views)
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Old 19th September 2016, 06:59 PM   #19
hesener is offline hesener  Germany
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Zion, a ready made Phono Stage by the Paradise team
Nice - looks like a "Blowtorch" with bipolars
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Old 19th September 2016, 07:00 PM   #20
hesener is offline hesener  Germany
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Zion, a ready made Phono Stage by the Paradise team
what are q19-q22 doing, if I may ask? thermal compensation?
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