Fake primary capacitors

[Pentium4]

Re: Fake primary capacitors

Hahaha I am curious to know, they're probably 680's. And you should post some pics of the PowMax too!

[momaka]

Re: Fake primary capacitors

Not surprised about the JEE caps, those things are trash!

JEE, you think so?
Sorry, I just couldn't resist a dumb name joke like that

Although I have only seen them in ancient power supplies, think they went out of business?

I hope so. Chances are, though, if they are not making JEE caps anymore, they're probably selling under a different brand. Or worse, making sleeveless generic caps and selling to random people/companies to put on their own brand.

I'm going to pull out those JEE caps from my PowMax PSU and measure them on the capacitance meter in my friend's shop this week. Pretty sure the bulged one won't be in spec, but I wonder what the "good" one will show.

[Pentium4]

Re: Fake primary capacitors

I'm guessing an old Leadman unit?? I saw pictures here on BCN of a fairly okay-built LP-6100D unit with supposedly original "Rubycon" primary capacitors. Makes me wonder if they were fake too. That PSU had some Rulycon caps on the secondary.

I have an older 6100D too (a PowMax). Built quite well but has 1 bulging 200V 1000 uF JEE cap on the primary and several Jun Fu WG caps on the 3.3V and 5V outputs.

It's not even a year old...Not surprised about the JEE caps, those things are trash! Although I have only seen them in ancient power supplies, think they went out of business?

It's amazing how widespread this problem is. I wonder why PSU manufacturers keep buying mislabelled capacitors.

It is amazing...You'd think they would want to know what they are getting!

[PeteS in CA]

Re: Fake primary capacitors

Well, tom, P/S mfrs don't make or label the caps they use (AFAIK). Delta started as a mfr of magnetic components, and Liteon as a semis mfr, but I don't know of any P/S mfr that started as a caps mfr. P/S mfrs specify and buy caps, and sometimes the price they can sell at dictates component choices. That may mean choosing between using dubious quality components and and having to stop selling to parts of the P/S marketplace. Both strategies have longterm risks.

All that said, the problem of fraudulently labelled caps is probably a fraud committed by the cap mfrs. They gave properly labelled parts in the design stage, and then started selling fraudulently labelled parts after prototyping and pilot production. Design, prototyping and pilot production is when testing is most stringent, and fraudulently labelled parts would be caught (by hold-up time or ride-through tests). Once in volume production, testing will likely be rudimentary (turned on, full load voltages, maybe min load voltages, maybe PARD). The P/S mfr should randomly and regularly subject samples off the production line to complete tests, but that takes time and disrupts/complicates the process slightly. And if they find a problem, what then? Line down? Recall product using the problem parts (Does the P/S mfr have records of what parts lots were used in what lots of P/Ss? Wanna buy a bridge?). So there's more than a bit of trust or willful blindness on the side of the P/S mfr. Unless there's a Dell-Nichicon-style disaster, no one will get hurt, except for the consumers whose computers were a bit flaky or lasted 2-4 years instead of until becoming hopelessly obsolescent.

[Khron]

Re: Fake primary capacitors

Do you even have to ask? (cheapness)

[tom66]

Re: Fake primary capacitors

It's amazing how widespread this problem is. I wonder why PSU manufacturers keep buying mislabelled capacitors.

[momaka]

Re: Fake primary capacitors

Came out of a Leadman

I'm guessing an old Leadman unit?? I saw pictures here on BCN of a fairly okay-built LP-6100D unit with supposedly original "Rubycon" primary capacitors. Makes me wonder if they were fake too. That PSU had some Rulycon caps on the secondary.

I have an older 6100D too (a PowMax). Built quite well but has 1 bulging 200V 1000 uF JEE cap on the primary and several Jun Fu WG caps on the 3.3V and 5V outputs.

[Pentium4]

Re: Fake primary capacitors

More! "technically" in spec but this was from a brand new PSU so I think they are fake once again...They feel pretty light even for 560

[Khron]

Re: Fake primary capacitors

... And they're not snap-ins

[ben7]

Re: Fake primary capacitors

I posted this in the hall of shame but figured might as well add it to this thread as well. Came out of a Leadman

Fake one LOL

KMG sleeves are supposed to be brown not black xD

[Pentium4]

Re: Fake primary capacitors

I posted this in the hall of shame but figured might as well add it to this thread as well. Came out of a Leadman

[ben7]

Re: Fake primary capacitors

They are still doing this. Cap was manufactured the first week of 2013.

Get out the guns!

[Pentium4]

Re: Fake primary capacitors

They are still doing this. Cap was manufactured the first week of 2013.

[Heihachi_73]

Re: Fake primary capacitors

That line through the side of the 'Mercedes' vent looks like they tried to turn it into a K shape to match what a Rubycon should have.

[Pentium4]

Re: Fake primary capacitors

Notice the wacko vent shape on one of them!

Yeah true! But they probably had plastic discs over them though?

The JEE 330uF 200V primaries which came out of this trashed King World ATX-250W PSU measured at 202.8uF and 198.8uF respectively, both with an ESR of 0.07 ohms and a date code of 9828. No doubt they are 220s with a 330uF label, as they are still in tolerance of said capacitance.

Same again with Su'scon. The two 470uF 200V LXs I ripped from an L&C LC-230ATX were measured at 312.0uF and 319.9uF respectively; both 0.06 ohms ESR. As with the above caps, they are well within tolerance... of a 330uF capacitor. This PSU was also from 1998.

Wow that's crazy, doesn't surprise me though from L&C

[Heihachi_73]

Re: Fake primary capacitors

The JEE 330uF 200V primaries which came out of this trashed King World ATX-250W PSU measured at 202.8uF and 198.8uF respectively, both with an ESR of 0.07 ohms and a date code of 9828. No doubt they are 220s with a 330uF label, as they are still in tolerance of said capacitance.

Same again with Su'scon. The two 470uF 200V LXs I ripped from an L&C LC-230ATX were measured at 312.0uF and 319.9uF respectively; both 0.06 ohms ESR. As with the above caps, they are well within tolerance... of a 330uF capacitor. This PSU was also from 1998.

[ben7]

Re: Fake primary capacitors

Those are some decent looking fakes. Also curious to know their actual capacitance

Notice the wacko vent shape on one of them!

[Pentium4]

Re: Fake primary capacitors

Those are some decent looking fakes. Also curious to know their actual capacitance

[ben7]

Re: Fake primary capacitors

I found these fake Rubycon snap-in units in two identical Chinese power supplies.
Officially, Rubycon USP only comes in 85C whereas these fakes (both USP series) were labelled 105C.

Haha well found!

Got any esr specs and capacitance specs for the fakes? (I.e., are they actually 100uF?)

[japlytic]

Re: Fake primary capacitors

I found these fake Rubycon snap-in units in two identical Chinese power supplies.
Officially, Rubycon USP only comes in 85C whereas these fakes (both USP series) were labelled 105C.