TDA7294 PCB - Needs Checking - Page 4

cyberzeed · 14th April 2011, 03:09 PM

Thanks for your attention
I have some doubts about your amplifier:

About the L1, how many turns and what is the diameter and which wire to use?
With these power transistors what power i will have and whats the minimum impedance?

Thanks in advance.

cats squirrel · 14th April 2011, 03:52 PM

would it not be tempting to separate the power supplies to the input/voltage amplifying stages (pins 7 &8) from the output power stages (pins 13 & 15)? as it has been designed in, and all the pcb's and built amplifiers I have seen don't have this, it may be worth trying. Someone may like it!

nayrb · 14th August 2011, 11:39 AM

Hi sir wizardmaxx,
I am new here and i read your post about your TDA7294 amplifier. and i am interested of it and i want to try to build this circuit, can you give me complete parts list of your TDA7294 amplifier, tnx in advance sir...

flaotte · 11th January 2012, 08:28 AM

Can I power TDA7294 with single supply +47 VAC transformer? Does anyone have circuit for that?
I would make middle point with resistors. Would it work or do I need to get better middle point?

14th April 2011, 03:09 PM	#31
cyberzeed diyAudio Member Join Date: May 2010	About L1 on the schematic Thanks for your attention I have some doubts about your amplifier: About the L1, how many turns and what is the diameter and which wire to use? With these power transistors what power i will have and whats the minimum impedance? Thanks in advance.

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14th April 2011, 03:52 PM	#32
cats squirrel diyAudio Member Join Date: Feb 2011 Location: Devon, UK	would it not be tempting to separate the power supplies to the input/voltage amplifying stages (pins 7 &8) from the output power stages (pins 13 & 15)? as it has been designed in, and all the pcb's and built amplifiers I have seen don't have this, it may be worth trying. Someone may like it!

14th August 2011, 11:39 AM	#33
nayrb diyAudio Member Join Date: Aug 2011	Hi sir wizardmaxx, I am new here and i read your post about your TDA7294 amplifier. and i am interested of it and i want to try to build this circuit, can you give me complete parts list of your TDA7294 amplifier, tnx in advance sir...

11th January 2012, 08:28 AM	#34
flaotte diyAudio Member Join Date: May 2011	Can I power TDA7294 with single supply +47 VAC transformer? Does anyone have circuit for that? I would make middle point with resistors. Would it work or do I need to get better middle point?

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