Re: Fake primary capacitors
Sorry for off topic.
Some Chinese companies can fake rating on their cheap caps, could they also fake rating or specs on semiconductor products such as diode,... say they up a general purpose 1N4007 to FR107 or something ? It is serious, many fast recovery diodes are used in PSU.
ttn328
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Last Activity: 05-09-2023, 08:51 AM
Joined: 01-07-2011
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Re: the gutless, bloated, and fried power supply hall of shame
Seen this on the internet
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Re: Shame on you Corsair! (Capxon)
Sorry for a bit OT but related to Corsair - VS450, fake wattage ?
Corsair has recently launched the VS450 model in Vietnam. According to their website, they claim that: "Real power. The VS450 delivers a guaranteed 450 Watts of continuous power"
[url]http://www.corsair.com/cn/vs-series-vs450-450-watt-80-plus-certified-power-supply.html[/url]
Today, on some Vietnamese forums, users have a suspicion that the VS450 can't deliver 450W. None of those have enough equipments to test. The link below is in Vietnamese...Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
Yes, the transformer is very very small, it is smaller than the one of my Pen II Dell 200W PSU....Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
Sorry for misspelling ... jumpered
Thanks for all your info. My friend paid 150000 vn dong (about 7 USD) for it, don't know how much power it could supply....Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
This PSU has no PFC, just jumbered. I don't know who is real manufacturer. This is their logo....Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
VENR (fake ?) 450S-ATX
No EMI filter. Primary caps : Fhy 330uF - 200V x2 85C
Two transistors 5VSB: C945, D13003
Main switcher: D13007 x2. Very small main tranformer.
Secondary:
Rectifiers: S16C40C x2, F12C20C. No pi filters.
DC filter caps: 1000uF - 16V x3 , 470uF - 16V, 1000uF - 16V (5VSB), all BH 105C.
PWM controller : HS8108....Leave a comment:
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Re: Using a ceramic buzzer as computer speaker ?
Thank all of you very much. All your opinions are very useful.
As for regular electromagnetic buzzer, I have already got some pieces. The situation is that I want to learn about an alternate ability. What I wonder is that using ceramic buzzer can harm the motherboard or not. I do not dare try to plug it in to test.Leave a comment:
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Using a ceramic buzzer as computer speaker ?
Hi All,
I have a motherboard which has no built-in buzzer. As far as I know, typically, an electromagnetic buzzer is used in this case. Is it possible to use a ceramic buzzer instead ?
Any opinions appreciated.
Thanks in advance. -
Re: ESR of a cap in parallel with ceramic one
Hi All,
The name " Le Hung " is a Vietnamese name. I recognized it just because the language in this name is my native language. I do not have any other thoughts.Leave a comment:
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