Re: fake PC supplies
- From: René <rjz~REMOVE~@xs4all.nl>
- Date: Tue, 24 May 2005 20:09:33 +0200
On Mon, 23 May 2005 21:45:35 +1000, "Adam. Seychell"
<invald@xxxxxxxxxxx> wrote:
>I'm recently seeing more cheap PC supplies on the market which appear to
>be fake, in that the clammed output power not impossible for the size of
>parts inside. e.g I have a 500W "Shaw" brand ATX supply, and its output
>inductor uses a piddly T106 (26mm OD) core. The 5V is specified at
>35Amps yet the output inductor winding is 2x1.2mm diam wire and the
>rectifiers for the 5V is a 15Ax2 Schottky device. This is typical for
>these very cheap power supplies. Similarly the 12V @ 18A output uses
>2x8A diode (STPR1620).
>
>I've also seen several other PC supplies that have completely omitted
>EMC components, and simply used wire links where the CM inductors are
>meant to go. Some PC supplies I've come across have even used standard
>ceramic/polyester capacitors in place of the Y and X2 rated safety
>capacitors.
>
>How do they get away with this ?
Off course they use the same "commercial Watts" as utilized in those 2
x 150W wallplug-adaptor-fed PC speakers.
Perhaps it's "500W PMPO".
Makes me think of early computer monitors that would do 1600 x 1200
pix; and >100Hz refresh. They would indeed - but not at the same time.
--
- René
.
- References:
- fake PC supplies
- From: Adam. Seychell
- fake PC supplies
- Prev by Date: Re: Thermocouple signal amplification
- Next by Date: Re: Designing HV transformers.
- Previous by thread: Re: fake PC supplies
- Next by thread: L oscillator stability
- Index(es):
Relevant Pages
|
Loading
