Forum: Troubleshooting Power Supplies and Power Supply Design
05-16-2022, 02:17 PM
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Replies: 3,195
Views: 1,040,441
Re: Power supply build quality pictorial. part 2
Looks like a filled up Deer (full input filter and nothing seems to be omitted). If you fully recap this L&C/Deer (upgrade the primary caps to at least 470u for 250W if you have any laying around)....
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Forum: General Capacitor Questions & Issues
04-19-2022, 12:00 PM
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Replies: 129
Views: 65,460
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Forum: General Capacitor Questions & Issues
01-21-2022, 06:37 PM
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Replies: 10
Views: 1,072
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Forum: General Capacitor Questions & Issues
10-20-2020, 02:49 PM
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Replies: 30
Views: 3,820
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...
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Forum: General Capacitor Questions & Issues
10-19-2020, 05:19 PM
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Replies: 30
Views: 3,820
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...
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Forum: General Capacitor Questions & Issues
10-17-2020, 04:49 PM
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Replies: 8
Views: 1,416
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,...
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Forum: General Capacitor Questions & Issues
10-06-2020, 08:46 PM
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Replies: 83
Views: 14,579
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...
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Forum: General Capacitor Questions & Issues
09-24-2020, 06:15 PM
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Replies: 11
Views: 2,713
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...
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Forum: General Capacitor Questions & Issues
09-20-2020, 02:48 PM
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Replies: 83
Views: 14,579
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Forum: General Capacitor Questions & Issues
09-19-2020, 05:36 PM
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Replies: 83
Views: 14,579
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...
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Forum: Troubleshooting Power Supplies and Power Supply Design
09-10-2020, 12:46 PM
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Replies: 1,722
Views: 458,984
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Forum: Troubleshooting Power Supplies and Power Supply Design
08-26-2020, 08:33 PM
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Replies: 1,722
Views: 458,984
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Forum: General Capacitor Questions & Issues
08-14-2020, 04:21 PM
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Replies: 83
Views: 14,579
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...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
06-29-2020, 06:07 PM
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Replies: 33
Views: 5,657
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).
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Forum: Troubleshooting Power Supplies and Power Supply Design
06-20-2020, 09:13 AM
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Replies: 25
Views: 2,748
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...
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Forum: Troubleshooting Power Supplies and Power Supply Design
06-18-2020, 08:12 PM
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Replies: 25
Views: 2,748
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...
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Forum: Troubleshooting Power Supplies and Power Supply Design
06-14-2020, 08:05 PM
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Replies: 25
Views: 2,748
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...
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Forum: General Capacitor Questions & Issues
02-27-2020, 07:45 AM
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Replies: 6
Views: 2,511
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Forum: General Capacitor Questions & Issues
02-12-2020, 05:15 PM
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Replies: 11
Views: 1,900
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Forum: General Capacitor Questions & Issues
02-05-2020, 10:22 AM
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Replies: 1,015
Views: 516,778
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Forum: Troubleshooting Power Supplies and Power Supply Design
06-18-2015, 08:34 PM
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Replies: 11
Views: 2,588
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.
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Forum: General Computer & Tech Discussion
02-26-2015, 06:36 AM
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Replies: 174
Views: 37,297
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...
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Forum: General Computer & Tech Discussion
02-13-2015, 10:32 PM
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Replies: 42
Views: 7,656
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...
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Forum: General Capacitor Questions & Issues
12-16-2014, 10:35 PM
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Replies: 29
Views: 12,168
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