How to clean the DC at mains. And ripple too.

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maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #100 on: 22 Apr 2018, 10:27 am »
Yesterday, Saturday, 238V -> bad sound in my two systems.

Sunday, 234V -> very good sound in my second system.

Variac?

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #101 on: 26 Apr 2018, 08:49 am »
Alternative to the expensive Mundorf MGO capacitors. But are screw terminal.


KEMET PEH200 Series, +85°C

[PDF] http://www.kemet.com/Lists/ProductCatalog/Attachments/391/KEM_A4034_PEH200.pdf




Cheap here:

http://www.elektrodump.nl/en/51-elco-low-voltage

Elco / KEMET low voltage 47000uF 63V 85ºC  € 10

-> http://www.elektrodump.nl/en/elco-low-voltage/2222-elco-low-voltage-47000uf-63v.html

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #102 on: 4 May 2018, 07:01 pm »
I was informing about Don Sachs DS-2, very very very interesting 6SN7 tube preamplifer.

http://www.dsachsconsulting.com/custom%20line%20stage.html

http://www.tubes4hifi.com/SP14.htm

and I see two white ferrites inside!



Don Sachs SP14 Tube Preamp Review

https://www.audiocircle.com/index.php?topic=138092.0

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #103 on: 4 May 2018, 07:57 pm »
Custom KT88 Tube Amplifier

http://www.dsachsconsulting.com/custom%20kt88%20tube%20amp.html

It has a RF/EMI filter inlet!


maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #104 on: 5 May 2018, 09:36 am »
New and very promising thread by Jean Paul, aka JPS64, and the new design!

Univeral Power Amplifier Control Center UPACC

http://www.diyaudio.com/forums/solid-state/322282-univeral-power-amplifier-control-center-upacc.html#post5424517

Quote
Some power amplifier needs temperature monitoring.

Some amplifier needs fan control like ALPHA BB.

They´re builders who want VU-Meter or FFT real time visualization.

All power amplifier needs AC main power filtering; perhaps controlled powering.

Some power amplifier owner needs DC blocking.

All power amplifiers needs inrush current limiter.

Power amplifiers works with 115/230VAC 50/60Hz.

Some owners wants volume control.

And at last (but not least), some owners prefers symetrical inputs.


maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #106 on: 16 May 2018, 08:16 am »
http://www.diyaudio.com/forums/vendor-s-bazaar/310402-fs-ultra-low-noise-power-supply-lt3045-based-pcb-post5435017.html

by Cornan

Quote
I already do, but a balanced one (plus a DC blocker trap filter in front of it) that looks like this internally.

[IMG] https://www.computeraudiophile.com/uploads/monthly_2017_09/20170926_194113-1.jpg.465d8fe5474a6cbd36a0b90570ac9dea.jpg


It is connected to this star-earthed power distributor.

[IMG] https://www.computeraudiophile.com/uploads/monthly_2017_09/20170926_193942-1.jpg.ee5469d436c687ac7c13ff8f640592b0.jpg


This balanced *floating* isolation transformer together with the LT3045s in series is actually the biggest reason why I want to build my LPSUs.

As you can see on the picture there is a switch on the balanced isolation transformer where I can choose to *float* or *ground*. No contest in my setup. *Floating* sounds by far the best.


Both are custom made by Aleksandar (ATL Hi-Fi).

https://www.atlhifi.com/

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #107 on: 26 May 2018, 09:52 am »
United Chemi-Con GPD miniature electrolytics

[PDF] https://www.mouser.com/datasheet/2/420/UCC_GPDDatasheet-1210831.pdf


I have only found available: 7500uF 35V EGPD350ELL752MM40H

https://www.mouser.es/ProductDetail/United-Chemi-Con/EGPD350ELL752MM40H?qs=IYueExuAvkp0C0aPkPvYcQ%3d%3d

3,74 €

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #108 on: 26 May 2018, 09:54 am »
[PDF] http://www.mundorf.com/english%201.1/Broschuere%20Einzelseiten/MLGO.pdf




Imagine a new PCB with 2+2 Chemi-Con GPD capacitors... 1+1 en parallel -> 9 mOhms, and only EUR 7.5.

Or the current PCB and a little bit of skill.

And a DCBx4 with 4+4 Chemi-Con GPD caps.

Problem to compare, especially the ripple current: Chemi-con measures are at 100 kHz and Mundorf at 100 Hz

maty

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Re: How to clean the DC at mains. And ripple too.
« Reply #109 on: 26 May 2018, 04:42 pm »
New assembled product from ATL Hi-Fi (Aleksandar):

Combined module Soft Start (inrush current limiter) & DC Blocker (trap, filter) – assembled in case

https://www.atlhifi.com/shop/fully-assembled-devices/combined-module-soft-start-inrush-current-limiter-dc-blocker-trap-filter-assembled-in-case/


with the space to add a RF/EMI filter too. This is: Schaffner FN2090-16-06

http://uk.farnell.com/schaffner/fn2090-16-06/filter-1-ph-16a-chassis-mount/dp/1304862?st=FN2090