Beginner Amp

locoo · 12th October 2010, 09:04 PM

Hello wourld

I have a question i nead help advice or some thing.
Tinking of bilding my own amp , tinking of using some of the tda chips.
It must be hi-fi 12v dc power 10w to ..
And will a swiching power suply do

tomchr · 09:32 PM

Switchmode supplies have a bad reputation in DIY audio for various reasons. One reason being people being stubborn and reluctant to change. But there are good technical reasons why one wouldn't use a switchmode supply in an audio amp. But that's not saying that you cannot use one.

If you can find a switchmode supply that can deliver the needed voltage and current, you're in business. If not, then I recommend that you start with a transformer, diode bridge, and reservoir caps like everybody else...

I do *not* recommend that you try to design or build the switchmode power supply yourself.

Tekko · 12th October 2010, 09:32 PM

LM1875 and a ATX computer power supply is about as simple as it gets.

locoo · 12th October 2010, 09:48 PM

Well i thought of this as a power suply

and it says for the tda that it neads -12 +12 and the atx power suply gives only 0,8 A on the -12.Will it be enough and is it HI-FI Quality.

locoo · 12th October 2010, 09:56 PM

well i got a power supply runing 12 v 10A

And for the lm1875 runs on -+15 on the data sheat and the standard atx gives only 0,8 A on the -12 out pot will it do?

And when i said HI-FI i ment hifi Quality on some chips datasheats it says hi fi and on some doesnt so is it inportant?

Tnx for the reply-s and sory for my bad english

Tekko · 13th October 2010, 08:16 AM

You can run a LM1875 on single supply, if you can tolerate the dc blocking capacitor on the output.

AndrewT · 13th October 2010, 12:42 PM

I won't say what I think!

locoo · 14th October 2010, 08:17 PM

What if i buy one of this it is class t i hear it is ok

There are four that are in play

You help me pick an is the t class any good copared to ab class

MKll Tripath TA2024 fully finished&tested pcb 2x15watt on eBay (end time 26-Oct-10 03:09:58 BST)

2*15W @4? Tripath TA2024 D-class Audio Amplifier Board on eBay (end time 10-Nov-10 08:54:06 GMT)

New Version MKIII Tripath DIY Audio TA2024 PCB on eBay (end time 29-Oct-10 02:19:02 BST)

Classic T digital TA2024 amplifier ? optimized Version on eBay (end time 24-Oct-10 09:12:41 BST)

12th October 2010, 09:04 PM	#1
locoo diyAudio Member Join Date: Oct 2010 Location: Zagreb	Beginner Amp Hello wourld I have a question i nead help advice or some thing. Tinking of bilding my own amp , tinking of using some of the tda chips. It must be hi-fi 12v dc power 10w to .. And will a swiching power suply do

12th October 2010, 09:26 PM	#2
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	Switchmode supplies have a bad reputation in DIY audio for various reasons. One reason being people being stubborn and reluctant to change. But there are good technical reasons why one wouldn't use a switchmode supply in an audio amp. But that's not saying that you cannot use one. If you can find a switchmode supply that can deliver the needed voltage and current, you're in business. If not, then I recommend that you start with a transformer, diode bridge, and reservoir caps like everybody else... I do not recommend that you try to design or build the switchmode power supply yourself. Last edited by tomchr; 12th October 2010 at 09:32 PM.

13th October 2010, 12:42 PM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	I won't say what I think! __________________ regards Andrew T.

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12th October 2010, 09:32 PM	#3
Tekko diyAudio Member Join Date: Jan 2005	LM1875 and a ATX computer power supply is about as simple as it gets.

12th October 2010, 09:48 PM	#4
locoo diyAudio Member Join Date: Oct 2010 Location: Zagreb	Well i thought of this as a power suply and it says for the tda that it neads -12 +12 and the atx power suply gives only 0,8 A on the -12.Will it be enough and is it HI-FI Quality.

12th October 2010, 09:56 PM	#5
locoo diyAudio Member Join Date: Oct 2010 Location: Zagreb	well i got a power supply runing 12 v 10A And for the lm1875 runs on -+15 on the data sheat and the standard atx gives only 0,8 A on the -12 out pot will it do? And when i said HI-FI i ment hifi Quality on some chips datasheats it says hi fi and on some doesnt so is it inportant? Tnx for the reply-s and sory for my bad english

13th October 2010, 08:16 AM	#6
Tekko diyAudio Member Join Date: Jan 2005	You can run a LM1875 on single supply, if you can tolerate the dc blocking capacitor on the output.

14th October 2010, 08:17 PM	#8
locoo diyAudio Member Join Date: Oct 2010 Location: Zagreb	What if i buy one of this it is class t i hear it is ok There are four that are in play You help me pick an is the t class any good copared to ab class MKll Tripath TA2024 fully finished&tested pcb 2x15watt on eBay (end time 26-Oct-10 03:09:58 BST) 2*15W @4? Tripath TA2024 D-class Audio Amplifier Board on eBay (end time 10-Nov-10 08:54:06 GMT) New Version MKIII Tripath DIY Audio TA2024 PCB on eBay (end time 29-Oct-10 02:19:02 BST) Classic T digital TA2024 amplifier ? optimized Version on eBay (end time 24-Oct-10 09:12:41 BST)

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