Jamicons

[Neo2_000]

At last - I've seen them!

Never even heard of them till I read about them in this forum.

From what I recollect they are about on a par with the devil!

The all at once - two A-Open power supply units with them.

Hard to miss with their bright blue casings.

About half of them bulging and leaking everywhere.

Recapped one so far and tests OK.

[Topcat]

Re: Jamicons

Pics Please.

[Neo2_000]

Re: Jamicons

Sorry TC, no cam. One day maybe.

In the micro-ATX PSU there were some unusually small green caps which had swelled ouit.

On inspection these proved to be 330uF Jamicons!

Makes you wonder how low can you go?

Can see now why you guys likem so much

There was an inflated 470uF x 16V Jamicon also.

In another PSU I inspected, I found a couple of big Rubicon 470uF x 250V caps.

Needless to say, these appeared fine.

[yanz]

Re: Jamicons

all my acerview 33d monitor caps are jamicons. it has been running fine from more than 10 years...

i found those jamicon caps on some old at & atx psu that still running fine, dont remember the value. they ńegative mark are very unique...

[willawake]

Re: Jamicons

we have no data on jamicon being bad. you say it is a micro atx psu, can we exclude overheating or even mains power problem?

[Neo2_000]

Re: Jamicons

OK, I'm officially confused!

Just did a quick search for bad Jamicons and couldn't find a thing! That's a worry! Maybe I should use more ventilation when soldering from now on. Still, the name was so instantly familiar. Must have got it from somewhere? Oh well, one ticket to Graylands please!

OK. Since you don't have any records, I will have to get you some pics of these. Two PSU's, one micro, one regular, both A-Open brand. Since even the small value caps in the Micro are blown, there may be some doubt as to the cause. Having said that, there are also Teapo caps in it that exhibit no physical signs of failure.

As for the regular ATX power supply unit, this was definitely not a case of a massive power overload because it was still working, albeit contributing to all sorts of squirly problems on PC in question.

I should also point out that I live in a small country town of about 20,000 people and compared to the big city, it is said that we get more than our fare share of badcap problems. Something to do with the stability and quality of our deisel driven town power supply perhaps?

[willawake]

Re: Jamicons

there are also Teapo caps in it that exhibit no physical signs of failure.

they generally dont exhibit they are shy caps. how do they read on your esr meter?

[Neo2_000]

Re: Jamicons

Checked em out 4 ya - two 1000uF caps.

Would not have surprised me if they were also stuffed.

But surprise! .03 and .04 ohms on the ESR which is within reasonable limits.

Perhaps it was just a case of bad caps on the micro after all? But it would be a poor reflection on the brand name given the failures in such unusually low values.

Wadda you guys reckon?

[luptona]

Re: Jamicons

So does anyone have an official standing on the Jamicons at this point? I have a pair of HP X4000 memory boards that have two bad 1000 10v Fuh Yins on them and the local electronics shop is putting a pair of Jamicons on for me.

From what I've been able to find, I don't see an issue with these but if you *KNOW* otherwise, from experience, I sure would like to know!

Thanks

[willawake]

Re: Jamicons

we had one or two reports, generally it sounds promising but since you are only talking about 4 caps for 2 killer workstations, why not use the best caps you can find from the top brands.

[luptona]

Re: Jamicons

What is considered the best? I've even seen a couple of bad reports on the Rubycons too.

[MD Willington]

Re: Jamicons

Post links to the bad Rubycons please.

You sure they aren't RuLycons?

[linuxguru]

Re: Jamicons

I haven't actually seen a visibly failed Jamicon yet. Several in AT power supplies have lasted over a decade and a half. However, if you're putting in new caps, why don't you just go with Rubycons, Panasonics or Nichicons? The Rubycon YXG 1000/6.3 8mm is widely available and inexpensive. Similarly, the Panasonic FC 1000/10 10mm.

[willawake]

Re: Jamicons

i think you are in the states. pm Topcat who owns the forum, he has some good ones to sell.

[kc8adu]

Re: Jamicons

the jamicons i replaced were black with blue print.
i have found bad ones in several psu and some in a video card.