chumoy amp.. help!!

ceplos · 26th November 2009, 11:54 AM

i have done with my chumoy amp based onDIY Simple Headphone Amp Tutorial: Cmoy Amplifier i dunno if its working or not because when i try connect to my mp3 player its working n have a sound.. but when i unplug the 9 volt battery or switch off my amp n its still working n have a sound.. iam little bit confuse why my amp still working when i unplug the battery.. can anyone help?

Mooly · 26th November 2009, 12:47 PM

You may get sound with no battery but I would expect the level to be low and distorted possibly.

Maybe you have wired it up incorrectly (pictures

)

Puffin · 26th November 2009, 03:01 PM

I found it easier to follow this, than the pictures on that site.

ceplos · 26th November 2009, 05:38 PM

sorry i cannot post the picture now.. i will post later..

Mooly · 26th November 2009, 05:40 PM

It's a standard circuit configuration... if taking the battery out makes no difference you have it wired wrong

Green Marlin · 26th November 2009, 07:36 PM

Hi, i had the same problem with cmoy .
The problem was the resistor in out r3 o r4 i don't remember, but the problem is an error in the connection
Ciao Sergio

26th November 2009, 11:54 AM	#1
ceplos diyAudio Member Join Date: Nov 2009 Location: Selangor..	chumoy amp.. help!! i have done with my chumoy amp based onDIY Simple Headphone Amp Tutorial: Cmoy Amplifier i dunno if its working or not because when i try connect to my mp3 player its working n have a sound.. but when i unplug the 9 volt battery or switch off my amp n its still working n have a sound.. iam little bit confuse why my amp still working when i unplug the battery.. can anyone help?

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26th November 2009, 12:47 PM	#2
Mooly diyAudio Member Join Date: Sep 2007	You may get sound with no battery but I would expect the level to be low and distorted possibly. Maybe you have wired it up incorrectly (pictures )

26th November 2009, 03:01 PM	#3
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	I found it easier to follow this, than the pictures on that site.

26th November 2009, 05:38 PM	#4
ceplos diyAudio Member Join Date: Nov 2009 Location: Selangor..	sorry i cannot post the picture now.. i will post later..

26th November 2009, 05:40 PM	#5
Mooly diyAudio Member Join Date: Sep 2007	It's a standard circuit configuration... if taking the battery out makes no difference you have it wired wrong

26th November 2009, 07:36 PM	#6
Green Marlin diyAudio Member Join Date: Nov 2005	Hi, i had the same problem with cmoy . The problem was the resistor in out r3 o r4 i don't remember, but the problem is an error in the connection Ciao Sergio

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