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Power supply for Pearl phono
Power supply for Pearl phono
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Old 9th February 2005, 06:06 PM   #1
mattjk is offline mattjk  United States
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Default Power supply for Pearl phono

Help me build a powersupply!

I want build an excellent powersupply for the pearl I'm building, but would appreciate some tips, or post about your custom powersupply.

Thanks,
Matt
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Old 9th February 2005, 07:36 PM   #2
pro is offline pro  Italy
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The one showed in http://www.passdiy.com/pdf/pearlphono.pdf
page 3 is a very good one.
Ciao.
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Old 10th February 2005, 07:33 PM   #3
Ren is offline Ren  United States
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Matt,

I built the Pearl almost two years ago. Since it was my first real DIY project, I built it exactly as Wayne described it in the article. The Pearl is a fine-sounding phono stage without any mods. I don't think you'll be disappointed building it "stock".

If I were doing it over, I might try using soft-recovery diodes for AC recification and some film bypass caps for the PS electros, just because...

Ren
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Old 11th February 2005, 03:30 PM   #4
mattjk is offline mattjk  United States
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Sounds good, I will build the stock psu.

If I install the power supply into a shielded metal case, is it OK to install it into the same chassis?

Matt
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Old 11th February 2005, 06:57 PM   #5
Ren is offline Ren  United States
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Short answer: I don't really know.

Wayne recommended putting the PS in a separate chassis and I did that. However, I've never noticed any noise increase when I put the PS chassis right next to the preamp chassis.

Ren
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Old 11th February 2005, 07:45 PM   #6
pro is offline pro  Italy
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It's the same for me. Two metal chasses one on the other,but no problems. The sound ir really natural.
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Old 11th February 2005, 08:25 PM   #7
Panelhead is offline Panelhead
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Default Re: Power supply for Pearl phono

Quote:
Originally posted by mattjk
Help me build a powersupply!

I want build an excellent powersupply for the pearl I'm building, but would appreciate some tips, or post about your custom powersupply.

Thanks,
Matt

I also am very happy with my Pearl. It has a dual 30v, 50 watt Plitron transformer, schottky bridges, 10K ufd caps, and a pair of 4 mH 2 amp chokes.
This is external from the main phono board. I really think that is better than one boxing the unit. A power transformer can really radiate a field even through a metal housing.
The current draw on the Pearl is very small, 50 ma or so per channel. I really like chokes in the power supplies of class A circuits.

George
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