TDA7294 Stereo/Bridge with PSU

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#62
apexaudio said:
This PCB can be use with TDA7293 or TDA7294, clip work only on TDA7293.
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sorry again for silly questions but I need to know before I start with it again:
I have instead of 1000uf/35v 1000uf/50v can I use them?
for the grounding point do you suggest if I make both PCB work with same power supply input using the same ground or separated one?
for 0.1u can I use ceramic type?
2u2 what do you suggest for this type of capacitor?
thank you very much for your help, and I'm looking now to build more complicated project do you think as start for solid stat what I can use for first step?
I think this so complicated as first "http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier.html"?
but how about this one? "MOSFET Amplifier IRFP240/IRFP9240"🙄
 
#63
Hosam said:
sorry again for silly questions but I need to know before I start with it again:
I have instead of 1000uf/35v 1000uf/50v can I use them?
for the grounding point do you suggest if I make both PCB work with same power supply input using the same ground or separated one?
for 0.1u can I use ceramic type?
2u2 what do you suggest for this type of capacitor?
thank you very much for your help, and I'm looking now to build more complicated project do you think as start for solid stat what I can use for first step?
I think this so complicated as first "http://www.diyaudio.com/forums/solid-state/173462-studio-reference-amplifier.html"?
but how about this one? "MOSFET Amplifier IRFP240/IRFP9240"🙄
Click to expand...

U can use 1000/50 instead 1000/35, I suggest http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-beginners.html for first SS project.
Regards
 
#70
sorry again for posting another one but do you think Mile bridge mod could handle 55v dc from ps?
I build one in previous post to handle these:
- single LM3886 amp
- single TDA7294 amp
- bridge TDA7294 amp
- X-over with TL074 as you suggest me to build with LM
again if they all connected together then does this still make power supply danger to TDA's?
 
#72
My Project

thank you Mr Mile that has been shared circuit and layout components.
I have finished building the power amplifier based on TDA7294.
I feel happy for this series because his voice is soft to be heard.
I wanted to combine with the tone control, but I have not found the tone control is suitable for this amplifier.
pls help me Mr. mile to get the maximum sound crystal clear and detailed sound. Thanks APEX :up::up::up:
 

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#73
Hello,
I have made your circuit of TDA7294 Stereo/Bridge with PSU from this theme http://www.diyaudio.com/forums/chip-amps/162179-tda7294-stereo-bridge-psu.html . The amplifier will be used only in Bridge regime. But I have one problem. When I connect the music signal in the out there is a disturbance (rumbling). It is the same when I connect the GND, the input to the Master amp - the speaker starts to rumble. The Slave amplifier is also connected to GND. Do you have any idea what’s the reason for that? The elements are the same as those in the schematic, except the Capacitors which are 390pF. I have changed them with 220pF, but there is no influence. I think that I have Ground Loop, but I am not sure. I made a test with another amp (Slave), but the problem still exist.
Thank you in advance, I look forward to your answer.

Regards
 
#74
lyubcho88 said:
Hello,
I have made your circuit of TDA7294 Stereo/Bridge with PSU from this theme http://www.diyaudio.com/forums/chip-amps/162179-tda7294-stereo-bridge-psu.html . The amplifier will be used only in Bridge regime. But I have one problem. When I connect the music signal in the out there is a disturbance (rumbling). It is the same when I connect the GND, the input to the Master amp - the speaker starts to rumble. The Slave amplifier is also connected to GND. Do you have any idea what’s the reason for that? The elements are the same as those in the schematic, except the Capacitors which are 390pF. I have changed them with 220pF, but there is no influence. I think that I have Ground Loop, but I am not sure. I made a test with another amp (Slave), but the problem still exist.
Thank you in advance, I look forward to your answer.

Regards
Click to expand...

Can you post pictures?
 
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