need help to build my own smps based on blaupunkt schematics gta400 please - Page 15

Ground Zero · 11th January 2011, 06:48 PM

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 · 07:30 PM

fr.farnell.com

Ground Zero · 12th January 2011, 12:44 PM

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 · 12th January 2011, 03:18 PM

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

Ground Zero · 12th January 2011, 05:26 PM

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

Ground Zero · 25th January 2011, 11:25 AM

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 · 28th January 2011, 11:04 AM

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 · 29th January 2011, 04:34 PM

Hello Luka

Ok thanks

For the moment i stop the project because i need money

but i will continue it soon

Ground Zero · 19th August 2011, 01:03 PM

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

11th January 2011, 07:26 PM	#142
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	fr.farnell.com __________________ home page @ http://www.classdaudio.tk/ @ 24/7 all year long I FEEL SLOVENIA Last edited by luka; 11th January 2011 at 07:30 PM.

12th January 2011, 03:18 PM	#144
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	well then find local store, it won't get any cheaper then that __________________ home page @ http://www.classdaudio.tk/ @ 24/7 all year long I FEEL SLOVENIA

28th January 2011, 11:04 AM	#147
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	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 __________________ home page @ http://www.classdaudio.tk/ @ 24/7 all year long I FEEL SLOVENIA

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11th January 2011, 06:48 PM	#141
Ground Zero diyAudio Member Join Date: Aug 2007	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

12th January 2011, 12:44 PM	#143
Ground Zero diyAudio Member Join Date: Aug 2007	Hello Luka Thanks but i know farnell, the problem is the price of shipping cost, it's expensive "12" euros for just 8 condensators

12th January 2011, 05:26 PM	#145
Ground Zero diyAudio Member Join Date: Aug 2007	I'll try to find a store to finish my amplifier

25th January 2011, 11:25 AM	#146
Ground Zero diyAudio Member Join Date: Aug 2007	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

29th January 2011, 04:34 PM	#148
Ground Zero diyAudio Member Join Date: Aug 2007	Hello Luka Ok thanks For the moment i stop the project because i need money but i will continue it soon

19th August 2011, 01:03 PM	#149
Ground Zero diyAudio Member Join Date: Aug 2007	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

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