TDA2040 Amp

[Fritzell]

Hey everyone, im putting together the TDA2040 20Watt amp from this circuit schematic
http://www.electro-dan.co.uk/electronics/TDA2040.html

Its the first time i build with chip amps and actually putting all stuff together in a little box. So i was wondering (spell?) If there is something special i shall think about when i wiring everything up. I made the circuit + preamp on a "towerboard" (not a pcb) and im using 2 4700mFD 40V capacitors. I think i shall put the chip to the box and use the whole box as a heatsink.
It would be nice to hear if someone else has done this and tell me something about it

Thanks

 

[Kiriakos]

Bang & Olufsen will disagree with the version of the above story.


Old LX2502 Bang & Olufsen TV set, this came to the point having severe components aging problem (picture stability), and I did dismantle it for recycling, but I did kept it pair of speakers and this TDA2040 stereo amp.
This working with +/_ 20V DC it is written even over the PCB.

The plan is me to create a new power supply (just diodes bridge and transformer is what is needed).
I will combine two 12V 3A transformers, simply because I have them in my workshop.

While this project looks simple, I have to remove several unneeded components, and this will take significant time.

 

[Kiriakos]

My project this started moving.
Any one interested he can have a quick view here LX2502 Bang & Olufsen TV set & transformation to sound amp 2x15W 8Ohm

 

[nigelwright7557]

I would put the decoupling as close to the 2040 as possible.
Keep wiring as short as possible.
Use star grounding especially where power supply is concerned.

 

[Kiriakos]

Use star grounding

Will do, as soon I will find or make a metal enclosure for it.

Addtionaly what looks as amazing is that the specific chips they run almost frozen at my test setup with +12.5V, 0V, -12.5V .
Now I am looking to use 20V so to measure any output gain difference with my Oscilloscope.