This.
I've never had a coil just burst into flame for no reason.
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jonnyGURU
Badcaps Veteran
Last Activity: 04-24-2024, 04:22 PM
Joined: 02-07-2006
Location: Lake County, IL
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Re: Dead ATX power supply, please help.
This.
I've never had a coil just burst into flame for no reason....
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Re: Wanting to send/receive data over DC power pair
But I've never used that, nor do I have an immediate use for it so.....
I think I'm stuck in the mud on this one. Might have to count my blessings with four conductors and USB 2.0 speeds.
I used to think DC power was superior, but now I'm wishing for some more AC in my life. Oh well!
Last edited by jonnyGURU; 03-06-2011, 08:41 PM.Leave a comment:
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Re: Wanting to send/receive data over DC power pair
Ok... I looked at the USB 3.0 pin out and it looks like it uses the standard +5V, gnd, D+, D- like USB 2.0, and better speeds can be accomplished due to the better controller, but there's also the differential pins, 2 x RX and 2 x TX to obtain even better speeds. So it certainly seems like full USB 3.0 speds are out of the question.
And certainly, since the data isn't going to be shielded from power, I'm only going to see 1.5Mps speeds at the highest, which is pretty pathetic.
That sort of speed sacrafice...Last edited by jonnyGURU; 03-06-2011, 04:41 PM.Leave a comment:
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Re: Wanting to send/receive data over DC power pair
I know USB 2.0 uses four wires, but two of those wires are DC power and ground: +5VDC, Ground, data + and data -. USB 2.0 operates with two wires if you remotely power the device. For example: When we did Phobos at BFG, the iPod dock on top was only wired up to the USB controller with two wires, D+ and D-. The port's power came from the +5VSB of the PSU. This allowed the docked iPod or iPhone to continue getting charged even when the PC is "off" and in stand by.
I was not aware USB 3.0...Last edited by jonnyGURU; 03-06-2011, 04:00 PM.Leave a comment:
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Re: Wanting to send/receive data over DC power pair
Oh.. here some important variables that might make or break this project....
I need to be able to supply 10 to 15W of power (5VDC @ 2 to 3A). And the data could be as high as 3 to 5 Gb per second. Think USB 3.0. Essentially, I'm trying to make a powered USB hub that can provide its own power when plugged into the wall, or pull power from the PC when the hub is not plugged in.Leave a comment:
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Wanting to send/receive data over DC power pair
Hard to categorize this one.
It's power related... umm... not so much.
I'm wanting to do something that seems simple on the surface, but I can't figure out why its so dang hard to find information on when I'm looking for it. I don't know what IC to use, what kind of components... I don't know where to even start....
It's not hard to find information on data over AC (Home PNA, for example). But what I'm trying to do is send serial data (like to/from a USB device) over a +5VDC pair. My conduit actually handles two voltages (+19VDC and +5VDC as well as data), so if I... -
Re: Need help finding an LF Power Amp for my load tester
Wow! Thanks hardwareguy!
I actually found a couple pieces in Taiwan that are exact matches, so I have someone over there trying to figure out who's actually reputable enough to buy from.
Funny thing is that the data sheet says this transistor pairs up with the 2SD1435K. Maybe in typical applications, but in this load tester I can't find any 2SD1435K's!!Leave a comment:
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Re: Need help finding an LF Power Amp for my load tester
Agreed. There must be. Any ideas?...Leave a comment:
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Re: Need help finding an LF Power Amp for my load tester
Yeah... Thanks. I've got the datasheet and I'm afraid it doesn't help me find an equivalent. Maybe it can help someone else find an equivalent for me though. I'll offer up a free PSU in exchange for a good lead.
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Need help finding an LF Power Amp for my load tester
I've been looking all over for a Hitachi 1031(K) low frequency power amplifier for the ol' Sun Moon SM-268. It burned out and now the thing pops any PSU you plug into it. Stupid little $2 part and I can't find one.
Any help would be appreciated, alternate part numbers, source even if it's in China, etc.
Here's pics of a burnt one and a functioning one:... -
Re: PSU With Premium Capacitors
This is going to sound like a plug, but....
BFG ES-800 uses all Chemi-Con and Hitachi: [url]http://hardocp.com/article.html?art=MTQ2NywzLCxoZW50aHVzaWFzdA==[/url]Re: PSU With Premium Capacitors<br /...aWFzdA==[/url]Leave a comment:
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Re: Samxon question
Good thing the guy didn't buy hard drives from us!
For the record: I never had the problems with Deskstars that everyone reports either. Had four with no problems what so ever. About seven years too, I'd have to say. Then again, cheapest PSU I've ever used was an Enermax or Antec.
I hear some people complaining about Seagate SATA drives and high failure rates. Again, no problems here. And I deployed about 300 of them as voice mail servers with RAID1. Only one failed within a year and 2 after a year's time. The...Leave a comment:
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Re: Similar PSU's?
There are only three primary caps on the OCZ. As PITA as it was, I had the top half off and it was clear to see there was nowhere eles for any caps to hide.
Unfortunately, that review was 1.5 years ago and that unit long gone so I can't take any more pics for you.
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Re: Samxon question
True. It may very well be that "bad caps" didn't even kill these boards. But you don't know the whole story either. There is far more anecdotal evidence beyond "the PSU has excessive ripple output". I'll give you more background....
At TCWO we had barebones systems that had components in them that we already qualified. Motherboard, PSU, etc. Sold these units for years. Never had a problem. RMA rate on either motherboard or PSU was under 1%.. EASILY.
In comes local PC builder guy. Buys just the...Last edited by jonnyGURU; 04-01-2008, 07:13 AM.Leave a comment:
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Re: Samxon question
I'm going to disagree with kikkoman on this one.
Your statements are full of generalizations. Most PSU's are full of crap caps? That's why PSU's fail? Wrong.
I used to do RMA for TCWO (3 years) and ASI (two years) and most PSU's did not come back with bad caps.
Actually, most PSU's die due to fan failure (and then typically whatever fails due to the fan failure, which typically isn't cap related either). Of course, the fan is the part of a PSU with the shortest MTBF and it's MTBF is never calculated into the PSU's...Leave a comment:
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Re: Samxon question
Of course. For example, I'm looking at Samxon and will likely use Jun Fu as a back up. As it is Samxon seems to be able to do better volume than a lot of suppliers, so there may never be a need to use the Jun Fu's.
Yeah. The behaviour of caps on motherboards is entirely different than in PSU's. Linuxguru explained it rather eloquantly somewhere here in the forums, but I can't find it right now.
Actually, most caps used in PSU's are either 2000 hours @ 85°C or 1000 hours @ 105°C....Leave a comment:
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Re: Another Deer In the Crosshairs
Mmmm... I seem to remember fairly vividly some BX boards at the end that would do 133/66. I'll research....Leave a comment:
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Re: Samxon question
With rebate, which takes into consideration about a 50% redemption rate.
Also, Corsair is used to selling memory at next to nothing margins. Making 15 points on a power supply is like a gold mine to those guys....
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Re: Similar PSU's?
Yup. Plotech offers great quality and low price for OEM's needing 4-layer PCB....Leave a comment:
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Re: Similar PSU's?
I don't have to. Already have.
The old BFG 600W is based off the same Acbel platform: [url]http://www.bfgstore.com/ProductDetails.asp?ProductCode=BFGS600WPSU[/url]
And I already reviewed the EvoXstream 600W here: [url]http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=26[/url]
They're similar, yes. But not the same.Re: Similar PSU's?<br /> <br /> <b...S600WPSU[/url]...Leave a comment:
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