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Search: Posts Made By: pc7fan
Forum: General Capacitor Questions & Issues 10-20-2020, 02:49 PM
Replies: 30
Views: 1,017
Posted By pc7fan
Re: 4700uF 6.3v and 3300uF 16v in a 10mm Diameter

SMG is a fine choice, but remember that estimated lifetime doubles each 10 degrees Celcius less. KMG then should technically have double the lifetime than SMG at 4000 hours at 85C, if other factors...
Forum: General Capacitor Questions & Issues 10-19-2020, 05:19 PM
Replies: 30
Views: 1,017
Posted By pc7fan
Re: 4700uF 6.3v and 3300uF 16v in a 10mm Diameter

They used KMG for a reason, those aren't areas that require high ripple current, thus 105 GP caps deem appropriate for decoupling. I have also seen good 10mm 16/3300 and 6.3/4700 Fuhjyyu TN that...
Forum: General Capacitor Questions & Issues 10-17-2020, 04:49 PM
Replies: 8
Views: 482
Posted By pc7fan
Re: Blown cap

Indeed, I've also seen failed Taicon primaries. I have actually seen more failed primaries than secondary caps from them. I would say failure rate for primaries is about on par as with Samxon,...
Forum: General Capacitor Questions & Issues 10-06-2020, 08:46 PM
Replies: 52
Views: 4,943
Posted By pc7fan
Re: Panasonic FC series - leaking? quality gone?

I would vow Taicon (Nichicon, Taiwan) as a 2nd tier brand, along Samxon and SamYoung (NCC, Korea), excluding the faulty series. They are arguably decent and they seem to be consistent - lifetime...
Forum: General Capacitor Questions & Issues 09-24-2020, 06:15 PM
Replies: 11
Views: 1,254
Posted By pc7fan
Re: Replacement Chemicon SMG caps

FR is an aqueous series AFAIK, similar specs to HE. All very good caps. Since this amp used SMG, I would preferably stick with the same class of caps, but using higher temperature variants. KMG, NHG...
Forum: General Capacitor Questions & Issues 09-20-2020, 02:48 PM
Replies: 52
Views: 4,943
Posted By pc7fan
Smile Re: Panasonic FC series - leaking? quality gone?

It is indeed a non-aqueous series. Regardless, if a cap catches fire in a power supply, something's seriously wrong :P
Forum: General Capacitor Questions & Issues 09-19-2020, 05:36 PM
Replies: 52
Views: 4,943
Posted By pc7fan
Re: Panasonic FC series - leaking? quality gone?

Seen that notice from NCC. LXJ is not as prone to leak from the bung as the noted ones.. but when they leak, they wreck PCB traces just like the others. The only brand from that era that I don't see...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-10-2020, 12:46 PM
Replies: 1,661
Views: 378,815
Posted By pc7fan
Re: the gutless, bloated, and fried power supply hall of shame

Always brown. Same with KMM, KMQ and KMG.
Forum: Troubleshooting Power Supplies and Power Supply Design 08-26-2020, 08:33 PM
Replies: 1,661
Views: 378,815
Posted By pc7fan
Re: the gutless, bloated, and fried power supply hall of shame

What a ridiculously underseized transformer. Like Pete, I would say 150W continuous... Unless you swap it with an EI33 or even an 35/39. These half bridge supplies are very similar between models and...
Forum: General Capacitor Questions & Issues 08-14-2020, 04:21 PM
Replies: 52
Views: 4,943
Posted By pc7fan
Re: Panasonic FC series - leaking? quality gone?

Am wondering as well. I've also seen a few FCs leak in older GM/Ford ECUs. likewise Nichicon PF/PL/PR, NCC LXF/LXJ leakers that I can remember that I've seen in many 80s/90s old electronics. Does...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-29-2020, 06:07 PM
Replies: 33
Views: 2,904
Posted By pc7fan
Re: DC Power Supply QW-MS605D

I have an MS605D here. Replace the P75NF75 FET and that should fix the cap popping and cycling issue (use 100V output caps instead of the 63V ones).
Forum: Troubleshooting Power Supplies and Power Supply Design 06-20-2020, 09:13 AM
Replies: 25
Views: 1,381
Posted By pc7fan
Re: QW-MS3010D 30V 10A Variable PSU Blown MOSFET

The PSU design itself is OK, it's the parts that are not adequate for its rating, but after doing my modifications, it can deliver its full 300W and can short it without breaking anything. It was...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-18-2020, 08:12 PM
Replies: 25
Views: 1,381
Posted By pc7fan
Re: QW-MS3010D 30V 10A Variable PSU Blown MOSFET

Yes, it is. Yes, you can put them in series. However unground the outputs.

Another common problem with these power supplies is the P75NF75 linear regulator FET fails D-S. (makes the supply lose...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-14-2020, 08:05 PM
Replies: 25
Views: 1,381
Posted By pc7fan
Re: QW-MS3010D 30V 10A Variable PSU Blown MOSFET

I have an QW-MS605D (same basic circuit as the 3010D except for a few components) the IRF840s in mine failed while running a 200W load. While it failed, it took out Q4, Q5, Q6 and Q7 - as well as the...
Forum: General Capacitor Questions & Issues 02-27-2020, 07:45 AM
Replies: 6
Views: 1,324
Posted By pc7fan
Re: Another custom C(r)apXon in FSP unit!!

Seen 16V 470uF custom CrapXons in 6.3x20 in FSP too, got to love it...
Forum: General Capacitor Questions & Issues 02-12-2020, 05:15 PM
Replies: 11
Views: 1,039
Posted By pc7fan
Re: Identifying reason for board's similar caps, but different physical sizes

Sacon? Rebadged GSC, garbage caps. Glad the PSU is working after the repair.
Forum: General Capacitor Questions & Issues 02-05-2020, 10:22 AM
Replies: 973
Views: 446,933
Posted By pc7fan
Re: The Hall of Shame - Badcaps Photo Montage

^
Seen plenty of bad WB series caps, they also fail open without any visible signs as well. Replace all of these caps, not only the bulged/leaked ones.
Forum: Troubleshooting Power Supplies and Power Supply Design 06-18-2015, 08:34 PM
Replies: 11
Views: 2,054
Posted By pc7fan
Re: Adapters Voltages?

Once I had a 12V 500mA wall wart and unloaded it was reading around 28V (but with a 24 ohm resistor - 500 mA load), it was 10% of the labeled 12 volt rating.
Forum: General Computer & Tech Discussion 02-26-2015, 06:36 AM
Replies: 174
Views: 33,676
Posted By pc7fan
Re: Windows Vista Pretty Much Sucks

Windows 8.x is actually faster & smoother than Windows 7 and even more stable. The only "minor" problem I got with it is the Metro interface. It looks nice but it is cumbersome. M$ is doing a good...
Forum: General Computer & Tech Discussion 02-13-2015, 10:32 PM
Replies: 42
Views: 6,472
Posted By pc7fan
Re: Trying Win 10 Install Preview!

Agreed, much better to prevent than trying to cure it, BTW Windows 10 build 9926 with all available updates is just as stable as Windows 7 IMO at basic operations, though RAM consumption is higher...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-13-2015, 08:39 AM
Replies: 4
Views: 7,386
Posted By pc7fan
Re: Magicjack power adapter failure

Very naaty indeed, you may use a genuine phone charger (Samsung, LG, etc), this MJ charger by the looks of it are low quality crap.
Forum: General Capacitor Questions & Issues 12-16-2014, 10:35 PM
Replies: 29
Views: 10,556
Posted By pc7fan
Re: bad caps of the 1990's played havoc with car ECU's

^^Could not agree more! Always use quality capacitors, especially in critical applications like this. These crappy caps should be only used on non critical equipment and on hobby projects.
Forum: General Capacitor Questions & Issues 12-03-2014, 07:09 PM
Replies: 3
Views: 1,496
Posted By pc7fan
Re: should OSTs in motherboard VRM sections always be replaced?

Agreed with you c_hegge - I've seen OST go bad in PSU's, especially in the 5Vsb section. They really despise heat AFAIK and just fail most of time without any physical signs. They're just fine in low...
Forum: General Capacitor Questions & Issues 11-27-2014, 01:34 PM
Replies: 17
Views: 2,214
Posted By pc7fan
Re: 470 'uf' 35V CapXon, Selecting the right cap.

Yes! I have seen alot of these small caps fail open (no capacitance and infinite ESR). They may look fine from the outside but they often fail open IMO. Most of these caps are from shoddy brands like...
Forum: General Capacitor Questions & Issues 10-24-2014, 08:01 PM
Replies: 37
Views: 11,907
Posted By pc7fan
Re: Any more info on counterfeit Nichicons?

What?! Is your tester good? About 3x the nominal value is impossible lol
Showing results 1 to 25 of 46

 
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