Dual power supply,switching model.

[båndsei]

I just recived a small powersupply from:
http://www.futurlec.com/index.shtml
ET-MINI PWR DAUL.pdf
It is working at 52 khz.
Will it be good for a preamp?

[star882]

Overkill but it should work.

[båndsei]

Overkill,maybe .I only have to ad a transformer and i get a regulated supply 1A and very low powerloos, for 10 USD and 4 UsD for shipping.
I would like comments about humm and noise.The caps are 1000UF. but its at 52khz. so wouldt it be enough for 0.5A. output. Low ripple like 20mv. or lower?

[doomy]

Originally Posted by båndsei

Overkill,maybe .I only have to ad a transformer and i get a regulated supply 1A and very low powerloos, for 10 USD and 4 UsD for shipping.

Cool.

But what else can this circuit do a LM317 or a 7812/7812 do?
(in case you don't need to save power)

This circuit is just a replacement for a diodebrigde with 7805 and 7812 with a few caps between + and ground. Plus a inductor in the output, but I'm not so sure about the details about a inductor.
Who may be cheaper than 14 USD, it depends what you've got...

I prefer a linary powersupply with a lot of heat and
GOOD caps but that's me.

I can't say that 1000 is too much or too little for you, but it can be wrong to have too much. Insert a high quality caps between 2 to 10uf in parallell with the big caps!

Ripple noise is not a big deal, the big deal lies is the question that
your switches powersupply gives your preamp a good natural sound.
Do the 52khz swiching affect the sound?



Good luck!