Caps on the connectors

[370forlife]

Topower does this, puts little 100uf or so caps on the molex connectors





Would it be worth doing on a rebuilt power supply that dosen't have enough filtering caps on the secondary? The trouble would be getting them in there, you would need a tool to remove the pins from the connectors.

[Per Hansson]

Re: Caps on the connectors

What?
That just looks too stupid IMO

And very easy to knock the capacitor off, or worse short it, since as we know Molex connectors can be so stuck you need a V8 truck and a towing wire to pull them out!

[KeriJane]

Re: Caps on the connectors

Hi 370

Oh, those regular Molex connectors are easy to remove from the connector.

Just get either a small pair of needle-nose pliers and squeeze in the tabs, or get a small piece of tubing from your local Hobby/Crafts store and push it down to compress the tabs and pull the terminal out the back.

Once out, you could solder a cap to it.

But wouldn't it be better just to get a good PSU?

Have Fun,
Keri

[370forlife]

Re: Caps on the connectors

But wouldn't it be better just to get a good PSU?

Have Fun,
Keri

Some people will refuse to buy a good power supply on the grounds of money. So they keep their sunpro, or other real POS power supply that has 1 filtering cap on each rail, and the cap size is 10mm so no real chance of just putting a large value cap in there.

@Per Hansson, you put shrink wrap over it. That connector in that pic had it at one time, but it was peeled off to show the caps on the connector.

[ratdude747]

Re: Caps on the connectors

yes. get a good psu. no matter what you do, a piece of crap is a piece of crap.

[momaka]

Re: Caps on the connectors

No wonder so many of the reviews on newegg say their units are DOA.
Like Per said, this is a sloppy design and it's just too easy to knock off something.

[Newbie2]

Re: Caps on the connectors

That just looks hideous.

[ratdude747]

Re: Caps on the connectors

yes. its the law that reads "an item will fail the day after the warranty expires."

thats called a shit design. total shit.

[370forlife]

Re: Caps on the connectors





These are what they look like with the sleeving on them.

[ratdude747]

Re: Caps on the connectors

still could get damaged if some dumbass used pliers to remove a stuck plug. also, if one used a y cable then you could get problems.

[Gianni]

Re: Caps on the connectors

Some people will refuse to buy a good power supply on the grounds of money. So they keep their sunpro, or other real POS power supply that has 1 filtering cap on each rail, and the cap size is 10mm so no real chance of just putting a large value cap in there.

If you have a small cap inside PSU does adding a 100uF make difference?
I think it is completely useless to add caps on connector: if you want to minimize ripple you have to put good caps close to the transformer/rectifier. Read some PSU application notes from ST, Onsemi, Unitrode, Fairchild, etc... all of them tell you to reduce current path between power element (transformer/rectifier/caps) to have good regulation, good performances and low ripple/noise.

Like Keri wrote: but wouldn't it be better just to get a good PSU?

Ciao
Gianni

[ratdude747]

Re: Caps on the connectors

but wouldnt having it right by the connector mean less interference?

im thinking ADDDING this to a good psu for added protection.

[Gianni]

Re: Caps on the connectors

but wouldnt having it right by the connector mean less interference?

Maybe... I'm not quite sure.
What do you mean with "interference"?

AFAIK every piece of hardware has his own input filter capacitor so if the voltage/power comes from a good PSU there's non need for extra cap.
Large capacitor reduce ripple and voltage fluctuation but if you want to reduce/eliminate spikes and high frequency noise you need MLCC.

Ciao
Gianni

[ratdude747]

Re: Caps on the connectors

just a thought. thats all.

[Logistics]

Re: Caps on the connectors

Uh... isn't that 100 picofarads?

[kc8adu]

Re: Caps on the connectors

any way you slice it its shit.

[Oklahoma Wolf]

Re: Caps on the connectors

Topower can't be bothered to do it right, but they'll gladly do this so they can make people think they're doing it right. It's one of the things that drives me nuts about them.

[weirdlookinguy]

Re: Caps on the connectors

http://www.hypermicro.com/itemdesc.a...SAB001&eq=&Tp=

[Pyr0Beast]

Re: Caps on the connectors

Tagan does this as well... some blocking and some operating capacitance.

[PCBONEZ]

Re: Caps on the connectors

Caps with that small a capacitance are there for EMI, not ripple, and from an engineering standpoint it's a great idea.