circuit prolems

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mike03

New Member

• Dec 21, 2009

• #1

I have this amp project that I'm trying to put together it is 600watt/300per ch.The problem I am having is that the symbols on the diagram are not properly labled I just cannot identify if the resistors are carbon or metal film and there % and watt.For some of the capacitors there is no voltage for them.

 

Vizier87

Active Member

• Dec 21, 2009

• #2

Please post your diagram as well. We'll take a look at it.

 

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mike03

New Member

• Dec 21, 2009

• #3

Here is the circuit https://www.electro-tech-online.com/attachments/ymya-600w-20audio-20amp-jpg.36543/

 

Attachments

• (YMYA)600W%20AUDIO%20AMP.jpg

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Nigel Goodwin

Super Moderator

Most Helpful Member

• Dec 21, 2009

• #4

I would suggest you find a proper circuit, that's absolute junk and even uses incorrect symbols for non-polarised capacitors.

 

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mike03

New Member

• Dec 21, 2009

• #5

Someone needs to help me out now please I need a circuit with good diagrams symbols somthing that can work well with the transformer I bought for this project which is. 38+0+38

 

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mike03

New Member

• Dec 21, 2009

• #6

Someone needs to help me out now please I need a circuit with good diagrams symbols somthing that can work well with the transformer I bought for this project which is. 38+0+38

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Dec 21, 2009

• #7

Have a look at:

https://www.ampslab.com/projects.htm

 

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mike03

New Member

• Dec 21, 2009

• #8

Not much there.Is there anymore sites that I can get some good projects to choose from?

 

M

mike03

New Member

• Dec 21, 2009

• #9

Not much there.Is there anymore sites that I can get some good projects to choose from?

 

chemelec

Well-Known Member

• Dec 21, 2009

• #10

mike03 said:

Not much there.Is there anymore sites that I can get some good projects to choose from?

Click to expand...

Send me an Email.

 

audioguru

Well-Known Member

Most Helpful Member

• Dec 21, 2009

• #11

The guy from YMYA simply copied the amplifier from the LM4702 datasheet. national Semi has a good applications note for it showing a recommended pcb layout.

The guy from YMYA lied about it producing 300W per channel into 8 ohms. A 300W into 8 ohms amplifier needs a supply that is plus and minus 65VDC. With your 38V-0V-38V transformer its output at clipping is 142W per channel into 8 ohms.

The guy from YMYA added a huge 400uF/400V output coupling capacitor that will reduce bass response. The circuit from National Semi does not have an output coupling capacitor.

 

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mike03

New Member

• Dec 21, 2009

• #12

Thanks brother that's why its good to be around a umbrella of proffesionals .