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11-06-2008, 04:05 PM
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100+ Head-Fi'er
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Join Date: Jul 2008
Location: Porto, Portugal
Posts: 439
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Quote:
Originally Posted by MASantos
Tangent, I can't see the image you posted above. Do other members see it?
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http://tangentsoft.net/elec/yjps/bitmaps/board-1.1.png
EDIT
n_maher got it first 
__________________
PC (WASAPI) → AMB/Mr.X γ1 (W.I.P) → Pure Silver m-RCA D.I.Y → Millett Hybrid MiniMAX D.I.Y (W.I.P) / AMB Mini³ D.I.Y → Sennheiser HD-650 / Grado RS-80
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11-06-2008, 05:38 PM
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Contributor  Headphoneus Supremus: Top Mall-Fi poster. The "T" in META42. Member of the Trade
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Join Date: Sep 2001
Location: Aztec, NM
Posts: 5,251
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Quote:
Originally Posted by n_maher
Tangent's url just got cut off.
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No, tangent just proved to himself that he still does occasionally post a URL publicly that points to his private web server. 
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11-06-2008, 06:27 PM
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1000+ Head-Fi'er
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Join Date: Oct 2006
Location: Vancouver, BC
Posts: 1,239
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Just a random idea...
I wonder if it might be useful to include a spot for a current sensing resistor before the output. Would be very handy for testing amps.
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11-06-2008, 06:51 PM
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Contributor Headphoneus Supremus: Top Mall-Fi poster. The "T" in META42. Member of the Trade
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Join Date: Sep 2001
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The point of this supply over something more typical is extremely low output impedance. You can't put a resistor on the output directly, or you'll wreck that. You could work out some kind of jumper scheme, but even that adds more resistance to the output.
If you install a Molex KK connector on the output, you can rig up an alternate version with such an inline resistor, or simply break the circuit with it so you can insert an ammeter.
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11-10-2008, 09:07 PM
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Contributor Headphoneus Supremus: Top Mall-Fi poster. The "T" in META42. Member of the Trade
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Join Date: Sep 2001
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Gerbers away.
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"Give a man a fish and he eats for a day. Teach a man to fish and he knows what tackle to buy."
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11-21-2008, 04:40 AM
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Contributor Headphoneus Supremus: Top Mall-Fi poster. The "T" in META42. Member of the Trade
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Join Date: Sep 2001
Location: Aztec, NM
Posts: 5,251
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__________________
"Give a man a fish and he eats for a day. Teach a man to fish and he knows what tackle to buy."
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11-21-2008, 10:33 PM
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500+ Head-Fi'er
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Join Date: May 2006
Location: Ireland
Posts: 785
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Tangent: will you be offering a kit for this (as opposed to the boards only) and also, will it be possible to do a dual rail supply with it?
Fran
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11-22-2008, 01:57 AM
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Contributor Headphoneus Supremus: Top Mall-Fi poster. The "T" in META42. Member of the Trade
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Join Date: Sep 2001
Location: Aztec, NM
Posts: 5,251
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Quote:
Originally Posted by fran
will you be offering a kit for this
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Sorry, no. Too many parts, many of them expensive. I wouldn't have a problem selecting a set of parts, but the expense and difficulty of kitting them in a sane fashion...<shudder>...
Quote:
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will it be possible to do a dual rail supply with it?
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Sure, but it would be inefficient. You'd end up with at least two YJPS boards, and either one or two transformers, depending on how you want to work that. If that's your goal, I think you'd be better off going with one of the small transformer-less Jung regulator boards that already exist.
And no, there won't ever be an inherently "dual" version of the YJPS, with everything on a single board. It's not my niche.
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11-22-2008, 02:13 AM
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100+ Head-Fi'er
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Join Date: Sep 2004
Posts: 203
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Those are pretty impressive numbers on that sheet of paper... 
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11-22-2008, 07:10 AM
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Contributor Headphoneus Supremus: Top Mall-Fi poster. The "T" in META42. Member of the Trade
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Join Date: Sep 2001
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Yes, that's rather the point of showing them.
I especially like the fact that the regulated output value didn't change at all when going from no load to a 105 mA load.
I haven't yet done LNMP testing, this is just my raw DMM readings. (My LNMP is broken at the moment. Grrr.)
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11-25-2008, 04:47 PM
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Junior Head-Fi'er
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Join Date: Nov 2008
Location: Upper Darby, PA
Posts: 25
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Application question
I hope an application question is OK here, even though this seems to be mostly a design thread. I need a new power supply for my Sota turntable - would the Young-Jung supply be appropriate for this use? Some details - my current supply puts out 25VDC (no regulation) and the motor momentarily draws around 150 mA while accelerating (occasionally up to 220 mA) and then settles to less than 50 mA. I'm looking for a lower cost high-performance alternative to Sota's "electronic flywheel", which is $300.
Thanks!
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11-25-2008, 10:21 PM
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Contributor Headphoneus Supremus: Top Mall-Fi poster. The "T" in META42. Member of the Trade
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Join Date: Sep 2001
Location: Aztec, NM
Posts: 5,251
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I don't see why this wouldn't work, but then, I've never built or even modded a turntable.
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11-25-2008, 10:57 PM
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Junior Head-Fi'er
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Join Date: Nov 2008
Location: Upper Darby, PA
Posts: 25
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OK thanks Tangent, I'll go ahead. And thanks in general for all your work on the PPA etc - I built a PPA and a STEPS and I love them!
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11-28-2008, 08:53 PM
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100+ Head-Fi'er
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Join Date: Aug 2008
Posts: 109
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I have a question about the filter that precedes the toroid in the schematic. Can this filter be applied to any electronic device's power supply?
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11-28-2008, 11:59 PM
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1000+ Head-Fi'er
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Join Date: Oct 2006
Location: Vancouver, BC
Posts: 1,239
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Quote:
Originally Posted by espressogeek
I have a question about the filter that precedes the toroid in the schematic. Can this filter be applied to any electronic device's power supply?
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It's basically identical to the circuit used in inexpensive line filters (e.g. http://www.cor.com/pdf/K.pdf), but with a beefier choke. You can use it for any circuit, provided you observe part ratings. Make sure you use line-rated components (C1 must be class X, C2 class Y) for safety.
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