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Old 11th September 2012, 01:54 PM   #541
MrSlim is offline MrSlim  Canada
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Quote:
Originally Posted by Jogi View Post
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--> +22000f/-22000f--> 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.
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Old 11th September 2012, 05:46 PM   #542
Jogi is offline Jogi  Germany
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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....
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Old 24th September 2012, 04:13 AM   #543
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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
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Old 24th September 2012, 10:18 AM   #544
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Default +/- 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
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Old 24th September 2012, 11:31 AM   #545
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Thanks Rens. I guess I'll be ordering some L15-D's, in that case
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Old 24th September 2012, 01:18 PM   #546
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My class D Amplifier...
Attached Files
File Type: pdf D_AMPL.pdf (110.0 KB, 439 views)
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Old 1st October 2012, 03:16 PM   #547
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Quote:
Originally Posted by luizcpimenta View Post
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.
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Old 1st October 2012, 05:14 PM   #548
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Originally Posted by portomomo View Post
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.
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Old 4th October 2012, 09:27 PM   #549
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Originally Posted by luizcpimenta View Post
My class D Amplifier...
Thanks
Thanks for share it to all
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Old 4th October 2012, 09:29 PM   #550
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Are you have part list for your amp?
What about protection?
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