DIY LM1875 chip amp on strip board made simple

dannyjmf · 4th October 2011, 02:42 AM

I recently completed a new pair of LM1875 based chip amp . This post is basically give an idea to other readers that want to construct a LM1875 chip based amp .... real quick n dirty ....

below are attached photos ....

teachjava · 4th October 2011, 03:45 AM

Quote:

Originally Posted by dannyjmf

I recently completed a new pair of LM1875 based chip amp . This post is basically give an idea to other readers that want to construct a LM1875 chip based amp .... real quick n dirty ....

below are attached photos ....

Great job! Do you get enough power out of the dual transformers?

dannyjmf · 4th October 2011, 04:31 AM

still waiting to get another one when have enough $$$ .... the smaller one is in case i want to add opamp ....and now also power the two case fan .....

Bicolor · 4th October 2011, 09:54 AM

Nice work, I am thinking about building one myself "quick and dirty" style.

AndrewT · 4th October 2011, 11:13 AM

Does your mains power supply socket/plug have a third pin to protect the users from equipment faults?

dannyjmf · 4th October 2011, 01:34 PM

currently not yet .... but planning forward to do it later .... this is still under prototype ...

dannyjmf · 4th October 2011, 02:09 PM

another surprise i found ..... though i didn't really build a power supply with high capacitance value .... also using strip boards for these amps .... noise is almost inaudible ....

Leolo · 5th October 2011, 03:23 AM

The LM1875 has 94dB ripple rejection. I should HOPE your amp is low noise.

4th October 2011, 11:13 AM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Does your mains power supply socket/plug have a third pin to protect the users from equipment faults? __________________ regards Andrew T.

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4th October 2011, 04:31 AM	#3
dannyjmf diyAudio Member Join Date: Feb 2010 Location: Malaysia - Melaka	still waiting to get another one when have enough $$$ .... the smaller one is in case i want to add opamp ....and now also power the two case fan .....

4th October 2011, 09:54 AM	#4
Bicolor diyAudio Member Join Date: Mar 2010	Nice work, I am thinking about building one myself "quick and dirty" style.

4th October 2011, 01:34 PM	#6
dannyjmf diyAudio Member Join Date: Feb 2010 Location: Malaysia - Melaka	currently not yet .... but planning forward to do it later .... this is still under prototype ...

4th October 2011, 02:09 PM	#7
dannyjmf diyAudio Member Join Date: Feb 2010 Location: Malaysia - Melaka	another surprise i found ..... though i didn't really build a power supply with high capacitance value .... also using strip boards for these amps .... noise is almost inaudible ....

5th October 2011, 03:23 AM	#8
Leolo diyAudio Member Join Date: Dec 2009 Location: Quebec	The LM1875 has 94dB ripple rejection. I should HOPE your amp is low noise.

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