need help to build my own smps based on blaupunkt schematics gta400 please

[Ground Zero]

Hello

For the moment i have no caps

I search a good website in European union who sell condensators for a good price so if someone have this it will be cool

i search condensators of 4700µF/25V with dimensions for D 18mm "max" and Length is not "really important"

thanks in advance

 

[luka]

fr.farnell.com

 

[Ground Zero]

Hello Luka

Thanks but i know farnell, the problem is the price of shipping cost, it's expensive "12" euros for just 8 condensators

 

[luka]

well then find local store, it won't get any cheaper then that

 

[Ground Zero]

I'll try to find a store to finish my amplifier

 

[Ground Zero]

Hello Guys

I finish my smps but i need to find a pretty box for it

Do you think i can use a plastic box ? or a box like that

Galaxy 40 - 10mm - HIFI2000 GX248 - 40x230x280 - Facade 10mm Noire

I think the plastic will be more simple to use but i'm worry about the heat of each components

If you have other box to advice me please ?
I need theses dimensions inside the box:
width: 31cm
depth:28cm
height: 4cm or more max 6 cm

Thanks in advance

 

[luka]

if you don't buy to big, and you can still put amps in, then metal is better, since you can use it as cooler and it looks great

 

[Ground Zero]

Hello Luka

Ok thanks

For the moment i stop the project because i need money but i will continue it soon

 

[Ground Zero]

Hello

I've got news about my smps

I change the capacitors value who are in serial with the snubbers resistor.

On the original schematics it use 100nf, with the snubbers resistors who comes really hot "about 106°C and seems grow up..." and the output square wave on the primary winding is not perfect.

In fact i decide to use a 10nf capacitors with 22ohms 10w resistors snubbers.

Now the square have on the primary winding is better and the (resistors/transformers) have a temperature of about 49 °C after burningtest of 30 minutes.

In the next day i will build other smps