Badcaps.net Forum
Go Back   Badcaps Forums > General Topics > General Capacitor Questions & Issues
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools
Old 05-26-2017, 07:12 AM   #801
RukyCon
A Fake Rubycon
 
RukyCon's Avatar
 
Join Date: Jan 2017
City & State: The Peoples Republic of California
My Country: USA
Line Voltage: 122.5VAC 59.9Hz
I'm a: Knowledge Seeker
Posts: 679
Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
Originally Posted by Per Hansson View Post
They got the letters reversed, it should be: SCRAP!
It was a typo on the company's half.
RukyCon is offline   Reply With Quote
Old 05-26-2017, 09:19 AM   #802
Behemot
Badcaps Veteran
 
Behemot's Avatar
 
Join Date: Dec 2009
City & State: Prague, 504'52.22"N, 1423'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
I'm a: Knowledge Seeker
Posts: 4,703
Default Re: The Hall of Shame - Badcaps Photo Montage

What meter you have? Anyway, why it has so short leads? New caps usually have long leads
__________________
Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

Exclusive caps, meters and more!
Hardware Insights - power supply reviews and more!
Behemot is offline   Reply With Quote
Old 05-26-2017, 09:46 AM   #803
Wester547
-
 
Join Date: Nov 2011
City & State: CA.
My Country: USA.
Line Voltage: 120-125VAC 60Hz.
I'm a: Knowledge Seeker
Posts: 1,265
Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
Originally Posted by ruky con View Post
The capacitor is still good [in my opinion] testing at 5000uf with an ESR of .18Ω.
That would depend on its Vloss measurements (leakage current). Capacitors can measure in-spec for capacitance and ESR but still out-of-spec for leakage current. I suppose it isn't difficult even for dodgy brands to manufacture "okay" general purpose capacitors (85C or otherwise). Manufacturing high quality low impedance capacitors, on the other hand, is a much more demanding practice. It requires very special additives and oxidizers, extreme purity of materials, exceptional QA, and precise manufacturing methods in order to make a stable and long-lasting end product. Low impedance capacitors is the "area" where most Chinese and Taiwanese brands just aren't very good.

Also, for a 16mmx25mm general purpose capacitor, 0.18Ω is a bit on the high side. Ideally it would not measure much higher than 0.10Ω.

Last edited by Wester547; 05-26-2017 at 09:57 AM..
Wester547 is offline   Reply With Quote
Old 05-26-2017, 09:53 AM   #804
Behemot
Badcaps Veteran
 
Behemot's Avatar
 
Join Date: Dec 2009
City & State: Prague, 504'52.22"N, 1423'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
I'm a: Knowledge Seeker
Posts: 4,703
Default Re: The Hall of Shame - Badcaps Photo Montage

Oh man, wait for that german fool, he'll explain ya how great them Chinese and Taiwanese are Cause some random who-knows-if-real guy in TDK Lambda told him, so it's true, ya know?
Behemot is offline   Reply With Quote
Old 05-26-2017, 05:03 PM   #805
RukyCon
A Fake Rubycon
 
RukyCon's Avatar
 
Join Date: Jan 2017
City & State: The Peoples Republic of California
My Country: USA
Line Voltage: 122.5VAC 59.9Hz
I'm a: Knowledge Seeker
Posts: 679
Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
Originally Posted by Behemot View Post
What meter you have? Anyway, why it has so short leads? New caps usually have long leads
The leads are pre cut by either the manufacturer or the seller.

Quote:
Originally Posted by Wester547 View Post
That would depend on its Vloss measurements (leakage current). Capacitors can measure in-spec for capacitance and ESR but still out-of-spec for leakage current. I suppose it isn't difficult even for dodgy brands to manufacture "okay" general purpose capacitors (85C or otherwise). Manufacturing high quality low impedance capacitors, on the other hand, is a much more demanding practice. It requires very special additives and oxidizers, extreme purity of materials, exceptional QA, and precise manufacturing methods in order to make a stable and long-lasting end product. Low impedance capacitors is the "area" where most Chinese and Taiwanese brands just aren't very good.
The Vloss on the capacitor is about 3% which i think is ok because i was told by a badcaps user that if it's below 4% then i should be good.

Quote:
Originally Posted by Wester547 View Post
Also, for a 16mmx25mm general purpose capacitor, 0.18Ω is a bit on the high side. Ideally it would not measure much higher than 0.10Ω.
I've seen general purpose capacitors with an ESR as high as 5Ω, i'm guessing that's bad, right?

Last edited by RukyCon; 05-26-2017 at 05:21 PM..
RukyCon is offline   Reply With Quote
Old 05-26-2017, 06:54 PM   #806
Wester547
-
 
Join Date: Nov 2011
City & State: CA.
My Country: USA.
Line Voltage: 120-125VAC 60Hz.
I'm a: Knowledge Seeker
Posts: 1,265
Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
The Vloss on the capacitor is about 3% which i think is ok because i was told by a badcaps user that if it's below 4% then i should be good.
It would be interesting to see if that capacitor could handle its rated voltage (16V) applied to the terminals. If the leakage current exceeds 752A after 2 minutes at 20C-25C (or 0.01CV, in adherence to the YEC SM datasheet), then it's out-of-spec.

Quote:
I've seen general purpose capacitors with an ESR as high as 5Ω, i'm guessing that's bad, right?
That would depend on the case size.
Wester547 is offline   Reply With Quote
Old 05-28-2017, 10:46 AM   #807
Behemot
Badcaps Veteran
 
Behemot's Avatar
 
Join Date: Dec 2009
City & State: Prague, 504'52.22"N, 1423'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
I'm a: Knowledge Seeker
Posts: 4,703
Default Re: The Hall of Shame - Badcaps Photo Montage

And capacity. The lower the rated cap, the higher the ESR, brand new 0.1uF lytics are in the range of tens of ohms.
Behemot is offline   Reply With Quote
Old 05-28-2017, 08:40 PM   #808
RukyCon
A Fake Rubycon
 
RukyCon's Avatar
 
Join Date: Jan 2017
City & State: The Peoples Republic of California
My Country: USA
Line Voltage: 122.5VAC 59.9Hz
I'm a: Knowledge Seeker
Posts: 679
Default Re: The Hall of Shame - Badcaps Photo Montage

Dead 1000uf 16v capacitor on a capacitor dropper power supply.

Though there was a zener diode next to the capacitor and the PCB under the diode was burnt making me think the zener killed it.
Attached Images
File Type: jpg 20170528_193156[1].jpg (743.9 KB, 230 views)
__________________
I'm not a expert, I'm just doing my best.
RukyCon is offline   Reply With Quote
Old 05-29-2017, 10:14 AM   #809
Behemot
Badcaps Veteran
 
Behemot's Avatar
 
Join Date: Dec 2009
City & State: Prague, 504'52.22"N, 1423'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
I'm a: Knowledge Seeker
Posts: 4,703
Default Re: The Hall of Shame - Badcaps Photo Montage

Incredible ripple spikes when the cap feiled killed the zener.
Behemot is offline   Reply With Quote
Old 05-29-2017, 06:54 PM   #810
RukyCon
A Fake Rubycon
 
RukyCon's Avatar
 
Join Date: Jan 2017
City & State: The Peoples Republic of California
My Country: USA
Line Voltage: 122.5VAC 59.9Hz
I'm a: Knowledge Seeker
Posts: 679
Default Re: The Hall of Shame - Badcaps Photo Montage

I may have spotted a panasonic capacitor in it's first stages of failure.
I tried to take a photo of it but it's really challenging to face the camera at the right angle to show the the bulging vent.
Here are two of the photos i took.


Here's a close up on the cap.

The one next to the NCC cap is the one that has the bulging vent.
I will try to desolder it sometime soon.
Attached Images
File Type: jpg 20170529_172808[1].jpg (1,005.5 KB, 227 views)
File Type: jpg 20170529_172938[1].jpg (747.3 KB, 227 views)
File Type: png panny.PNG (491.2 KB, 223 views)

Last edited by RukyCon; 05-29-2017 at 06:57 PM..
RukyCon is offline   Reply With Quote
Old 05-29-2017, 08:23 PM   #811
Wester547
-
 
Join Date: Nov 2011
City & State: CA.
My Country: USA.
Line Voltage: 120-125VAC 60Hz.
I'm a: Knowledge Seeker
Posts: 1,265
Default Re: The Hall of Shame - Badcaps Photo Montage

That capacitor is definitely starting to bulge. The board is just about eight years old judging by the date codes on the components. That negative polarity stripe (on the failed 820F 6.3V Panasonic FJS) looks suspiciously fuzzy, but I don't think it's a counterfeit, because... it looks like it was polarized the wrong way around! There always exists the chance that Panasonic sleeved it the wrong way around from the factory, though.

Carefully look at which way the other capacitor's negative stripe faces, then look at that one Panasonic. This looks to be an ASUS or Pegatron board, and those boards are known to have the shaded side of the polarity circle denote the anode side of the capacitor.

Last edited by Wester547; 05-29-2017 at 08:24 PM..
Wester547 is offline   Reply With Quote
Old 05-29-2017, 09:16 PM   #812
RukyCon
A Fake Rubycon
 
RukyCon's Avatar
 
Join Date: Jan 2017
City & State: The Peoples Republic of California
My Country: USA
Line Voltage: 122.5VAC 59.9Hz
I'm a: Knowledge Seeker
Posts: 679
Default Re: The Hall of Shame - Badcaps Photo Montage

Ok.
The motherboard came from a HP machine with a power supply fully capped with dying capxons.
RukyCon is offline   Reply With Quote
Old 05-30-2017, 09:24 AM   #813
Per Hansson
Super Moderator
 
Per Hansson's Avatar
 
Join Date: Jul 2005
City & State: ----
My Country: Sweden
Line Voltage: 230v 50Hz
I'm a: Knowledge Seeker
Posts: 5,213
Default Re: The Hall of Shame - Badcaps Photo Montage

Good eye Wester!
Time to take out the DMM and verify ruky con
__________________
"The one who says it cannot be done should never interrupt the one who is doing it."
Per Hansson is offline   Reply With Quote
Old 05-30-2017, 10:13 PM   #814
Behemot
Badcaps Veteran
 
Behemot's Avatar
 
Join Date: Dec 2009
City & State: Prague, 504'52.22"N, 1423'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
I'm a: Knowledge Seeker
Posts: 4,703
Default Re: The Hall of Shame - Badcaps Photo Montage

Oh yeah ASUS, always has to be special. They're the only in the universe having reversed polarity marking…how many caps I've only killed with these idiots and how many times I had to correct half of the already installed caps even if I've noticed on time SInce than I double or tripple check the polarity is normal each time I'm on a MoBo or VGA…

Last edited by Behemot; 05-30-2017 at 10:14 PM..
Behemot is offline   Reply With Quote
Old 06-02-2017, 04:49 AM   #815
RukyCon
A Fake Rubycon
 
RukyCon's Avatar
 
Join Date: Jan 2017
City & State: The Peoples Republic of California
My Country: USA
Line Voltage: 122.5VAC 59.9Hz
I'm a: Knowledge Seeker
Posts: 679
Default Re: The Hall of Shame - Badcaps Photo Montage

Dying nichicon VX capacitor from an audio amp.



And here are the dying CapXon capacitors from the HP PSU.


Attached Images
File Type: jpg 20170602_033925[1].jpg (1.20 MB, 203 views)
File Type: jpg 20170602_033945[1].jpg (1.50 MB, 201 views)
File Type: jpg 20170602_034444[1].jpg (1.23 MB, 195 views)
File Type: jpg 20170602_034511[1].jpg (2.12 MB, 193 views)
File Type: jpg 20170602_034543[1].jpg (1.72 MB, 194 views)
RukyCon is offline   Reply With Quote
Old 06-06-2017, 05:45 PM   #816
momaka
master hoarder
 
momaka's Avatar
 
Join Date: May 2008
City & State: VA (NoVA)
My Country: U.S.A.
Line Voltage: 120 VAC, 60 Hz
I'm a: Hobbyist Tech
Posts: 10,860
Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
Originally Posted by Wester547 View Post
That negative polarity stripe (on the failed 820F 6.3V Panasonic FJS) looks suspiciously fuzzy, but I don't think it's a counterfeit, because... it looks like it was polarized the wrong way around! There always exists the chance that Panasonic sleeved it the wrong way around from the factory, though.
Good catch!

I'd say someone probably has reworked the board before and placed that cap in backwards. I see all the other caps have their stripes facing the non-shaded half-circle on the board. So this is probably an ASUS motherboard.

Quote:
Originally Posted by ruky con
The motherboard came from a HP machine with a power supply fully capped with dying capxons.
HP has been known to use ASUS boards quite a bit.

For non-OEM boards, some of the older AsRock boards were also built by ASUS, so beware when recapping one of those.

Quote:
Originally Posted by Behemot View Post
Oh yeah ASUS, always has to be special. They're the only in the universe having reversed polarity markinghow many caps I've only killed with these idiots and how many times I had to correct half of the already installed caps even if I've noticed on time SInce than I double or tripple check the polarity is normal each time I'm on a MoBo or VGA
Well, in my case, I've recapped more ASUS boards than non-ASUS boards. After doing a small batch a few years back, I almost put the caps in backwards on a non-ASUS motherboard , due to being so used putting the caps with the anode facing the shaded semi-circle.
momaka is offline   Reply With Quote
Old 06-15-2017, 05:44 AM   #817
RukyCon
A Fake Rubycon
 
RukyCon's Avatar
 
Join Date: Jan 2017
City & State: The Peoples Republic of California
My Country: USA
Line Voltage: 122.5VAC 59.9Hz
I'm a: Knowledge Seeker
Posts: 679
Default Re: The Hall of Shame - Badcaps Photo Montage

Found this listing for Rubycon KZG capacitors.
http://www.ebay.com/itm/10PCS-16V-47...4AAOSwjL5ZB9Dk
Something about them seems a bit off.
RukyCon is offline   Reply With Quote
Old 06-15-2017, 12:03 PM   #818
PeteS in CA
Badcaps Veteran
 
PeteS in CA's Avatar
 
Join Date: Aug 2005
City & State: San Jose, CA
My Country: USA, Unsure of Planet
Line Voltage: 120VAC, 60Hz & 115VAC, 400Hz
I'm a: Professional Tech
Posts: 3,398
Default Re: The Hall of Shame - Badcaps Photo Montage

Quote:
Originally Posted by ruky con View Post
Found this listing for Rubycon KZG capacitors.
http://www.ebay.com/itm/10PCS-16V-47...4AAOSwjL5ZB9Dk
Something about them seems a bit off.
They aren't swollen?
__________________
PeteS in CA

Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
****************************
To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
****************************
Anti-Covid-Vaxxer pig crap claim/prediction, Doctor: Heart Failure from mRNA Jabs "Will Kill Most People" | Principia Scientific Intl. ; Dr. Geert Vanden Bossche Warns COVID-19 Jab Injuries and Deaths Will Soon "Collapse Our Health System" (VIDEO) ; Fully Vaxxed May 2021; Since that time I've done 7 5Ks, 1 8K, 8 10Ks, and 4 half marathons
PeteS in CA is offline   Reply With Quote
Old 06-15-2017, 07:30 PM   #819
delaware74b
Badcaps Veteran
 
delaware74b's Avatar
 
Join Date: Apr 2009
City & State: Delaware
My Country: USA
Line Voltage: 480VAC 60Hz or Less
I'm a: Knowledge Seeker
Posts: 597
Default Re: The Hall of Shame - Badcaps Photo Montage

....considering they're Chemicon, not Rubycon.

Some fool not knowing any better will buy them
__________________
Stupidity should be a crime, especially for drivers. I have NO patience for them.
delaware74b is offline   Reply With Quote
Old 06-15-2017, 07:36 PM   #820
eccerr0r
Solder Sloth
 
eccerr0r's Avatar
 
Join Date: Nov 2012
City & State: CO
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hobbyist Tech
Posts: 7,201
Default Re: The Hall of Shame - Badcaps Photo Montage

Dang... I stuck in some crappy chongx caps thinking that running 10V caps at 1.2V should last a while, but I was wrong... they bulged up and need to be replaced again after 6 months
I had one of the caps off the board a bit because I screwed up a via, and could access the pins from the top side of the board. I soldered another cap in parallel to that bulged cap (this probably would be a great picture for the "ghetto mods" thread) and verified that the board once again works as it should without removing the board from the case...

Maybe I should just leave it now and search for good deals on good caps...
eccerr0r is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 03:43 PM.
Did you find this forum helpful?