"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets - Page 229 - diyAudio
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Old 27th February 2014, 10:01 AM   #2281
AndrewT is offline AndrewT  Scotland
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Keantoken Multiplier
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Old 27th February 2014, 11:08 AM   #2282
Mark Kravchenko --- www.kravchenko-audio.com
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Keantoken's CFP cap multiplier

With many very constructive comments from Andrew.
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Old 27th February 2014, 05:44 PM   #2283
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Originally Posted by mwmkravchenko View Post
Keantoken's CFP cap multiplier

With many very constructive comments from Andrew.
Maaaaaaan... a lot to read, a lot to understand.
Many thanks
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Old 27th February 2014, 08:37 PM   #2284
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Andrew, before I read the whole thread and then realize not to have understand a lot, let me just ask you if you mean the K-multiplier on the site The K Multiplier

Is it that schemata I should build? I'm now at site 14 and there are a lot pages to read, but I'd like to build anything within the next days
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Old 28th February 2014, 08:38 AM   #2285
AndrewT is offline AndrewT  Scotland
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Yes.
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Old 1st March 2014, 04:03 PM   #2286
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Many thanks for your answer!

Another question:
When using a separate PS for the LME the IC is gonna be powered a little later then the outputs. As some amps have problems with that, what about "The Wire"?
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Old 4th March 2014, 12:05 PM   #2287
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Originally Posted by Stammheim View Post
Many thanks for your answer!

Another question:
When using a separate PS for the LME the IC is gonna be powered a little later then the outputs. As some amps have problems with that, what about "The Wire"?
To be really sure I have following question... The LME and the outputs have their own PS-connection on the board. So when I wanna use one PS for both I connect one PS to both connections, while if I wanna use a separate PS for the LME I connect it to LME's connection WITHOUT changing anything on the board, right?
As it's not described anywhere I'd like somebody to confirm it
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Old 4th March 2014, 12:22 PM   #2288
opc is offline opc  Canada
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Hi Stammheim,

Both power supplies need to be connected no matter what. There is no on-board connection between the two.

If you are running one supply for both the front end and the output stage, then wire both supply points separately back to the supply. This will prevent the front end voltage from dropping due to the drop across any supply leads.

If you are running separate supplies, simply wire each up to its respective terminal on the board, and you should be ready to go.

If you are running a single supply for both front end and output stage, you might want to try and isolate the front end supply with an additional CRC filter with large caps and a resistance value as high as you can get with only about a volt or two of drop. Because the front end draws a constant current, it will help reduce noise on the front end supply, and isolate it somewhat from ripple caused by the output stage when under heavy load. Somewhere in the ballpark of 10,000uF, 75R, 10,000uF would probably work reasonably well.

To address your earlier post about the supply of the ALF lateral fets, I will need to look into it a little further. You are correct that there does not seem to be trustworthy supplier for these parts at the moment, and everyone appears to be out of stock.

I have a healthy supply of 160V N channel parts (ALF16N16W) if anyone needs them, but that's all I have on hand. I will do a little digging and see if I can figure our why none of these lateral parts seem to be available anymore.

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Owen
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Old 4th March 2014, 12:34 PM   #2289
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Owen, many thanks for your fast response!
OK, I got it right, fine.

The ALF16N16W are easy to get, at least in Germany. So I'll try them out. As I only have the Hypex SMPS600 with +-65V I drive them at the upper end... and still think about using another PS.. also because of the higher voltage for the LME.

Did anybody have success with the DSP500? I read the thread from the beginning and am now on page 90, so still a lot of stuff...

Many thanks,

Stammheim
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Old 13th March 2014, 11:41 AM   #2290
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Originally Posted by Stammheim View Post
Owen, many thanks for your fast response!
OK, I got it right, fine.

The ALF16N16W are easy to get, at least in Germany. So I'll try them out. As I only have the Hypex SMPS600 with +-65V I drive them at the upper end... and still think about using another PS.. also because of the higher voltage for the LME.

Did anybody have success with the DSP500? I read the thread from the beginning and am now on page 90, so still a lot of stuff...

Many thanks,

Stammheim
In addition to my older questions...
To achieve the 360mA I'd liketo know where theyhave tobe measured... between both +-rails? Between +/- and GND?
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