MY DESIGN L20D IRS2092+IRFI4020H 200W8R - Page 55

MrSlim · 11th September 2012, 01:54 PM

Quote:

Originally Posted by Jogi

I am considering the L15-D mono modules and think about using a transformer with two 38V secondaries and 440Va, just because it is lying in the drawer. Should be o.K for the L15, as it uses lower voltage than L20.
The question is, if I can supply both modules from one +/- supply?
That means transformer--> rectification to ca 53 volt--> +22000µf/-22000µf--> 2 mono modules. Or do I get groundloops or something like this when not supplying each module by its own supply?

Thanks a lot for advice,

Juergen

You should be fine, most commercial amplifiers use a single power supply for two channels, that is unless they are using a fully "dual mono" design. I've got two L15D's running off a single 300R SMPS. It sounds great.

Jogi · 11th September 2012, 05:46 PM

Thanks, that's exactly what I wanted to read

. Those amps seem to be a great value, I'll order soon. Nice project for the long autumn nights....

DarpMalone · 24th September 2012, 04:13 AM

I have a question for LJM or anyone else who can answer regarding the L25D.

If I change the appropriate resistors, will it operate @ +/-42v?... Approximately how much power can I expect into 8R / 4R (2x 420VA transformers)?

Thanks

doctordata · 24th September 2012, 10:18 AM

Hi DarpMalone ,

Yes , It will work .
You'll get about 80 watts @ 8 ohms before clipping and double that @ 4 ohms .
See the reference design and calculate your resistors about in between the AMP7D-100 and the AMP7D-150 . Enjoy !

Cheers ,

Rens

DarpMalone · 24th September 2012, 11:31 AM

Thanks Rens. I guess I'll be ordering some L15-D's, in that case

luizcpimenta · 24th September 2012, 01:18 PM

My class D Amplifier...

portomomo · 1st October 2012, 03:16 PM

Quote:

Originally Posted by luizcpimenta

My class D Amplifier...

Hi luizcpimenta,
can you give more informations, i.e. in what your design is different from LJM's, how it works, sounds etc? Just a layout with no infos isn't of much information.

luizcpimenta · 1st October 2012, 05:14 PM

Quote:

Originally Posted by portomomo

Hi luizcpimenta,
can you give more informations, i.e. in what your design is different from LJM's, how it works, sounds etc? Just a layout with no infos isn't of much information.

It is exactly like the circuit LJM, except the bias, which put off the board.

Hadighorbani · 4th October 2012, 09:27 PM

Quote:

Originally Posted by luizcpimenta

My class D Amplifier...

Thanks
Thanks for share it to all

Hadighorbani · 4th October 2012, 09:29 PM

Are you have part list for your amp?
What about protection?

24th September 2012, 10:18 AM	#544
doctordata diyAudio Member Join Date: Apr 2010 Location: Brisbane	+/- 42 Volts Hi DarpMalone , Yes , It will work . You'll get about 80 watts @ 8 ohms before clipping and double that @ 4 ohms . See the reference design and calculate your resistors about in between the AMP7D-100 and the AMP7D-150 . Enjoy ! Cheers , Rens __________________ If you measure, you know; if you guess, you don't

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11th September 2012, 05:46 PM	#542
Jogi diyAudio Member Join Date: Jan 2008	Thanks, that's exactly what I wanted to read . Those amps seem to be a great value, I'll order soon. Nice project for the long autumn nights....

24th September 2012, 04:13 AM	#543
DarpMalone diyAudio Member Join Date: Sep 2008 Location: Toronto	I have a question for LJM or anyone else who can answer regarding the L25D. If I change the appropriate resistors, will it operate @ +/-42v?... Approximately how much power can I expect into 8R / 4R (2x 420VA transformers)? Thanks

24th September 2012, 11:31 AM	#545
DarpMalone diyAudio Member Join Date: Sep 2008 Location: Toronto	Thanks Rens. I guess I'll be ordering some L15-D's, in that case

4th October 2012, 09:29 PM	#550
Hadighorbani diyAudio Member Join Date: Jun 2010	Are you have part list for your amp? What about protection?