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Old 21st April 2009, 08:29 PM   #21
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Quote:
Originally posted by Eric Weitzman
25 watts per channel seems low if the amps are dissipating 300 watts per stereo channel and the output stage is drawing 3.5A at 50V. Where are the missing 100 watts?
They are pure heat. This is a Burning Amp.

You will get a lot more efficiency out of BA#2, which is push-pull
instead of single-ended/constant current source.

If you want more efficiency out of the all-N channel output stages,
we will expect to be doubling the efficiency in a later version.

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Old 22nd April 2009, 12:06 AM   #22
Variac is offline Variac  United States
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One of the reasons the board area is pretty tight is that the shorter chassis is very congested inside compared to t he longer one. - Mainly due to fitting in 4 supply capacitors...

I'm not sure if there ARE any short chassis with all 240 output devices..

Nelson states that with Elna Silmic 10uF radial caps it sounds great- now those would be easy to fit!! What other radial caps are there that people might consider?, and what are their lead spacing and size?
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Old 22nd April 2009, 12:12 AM   #23
Variac is offline Variac  United States
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This would be a great design for those that have gotten irf250 mosfets from Nelson over the years at Burning Amp. You would only need 4 or 6 per channel as each 250 is pretty much two 240's in one can...
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Old 22nd April 2009, 02:13 AM   #24
eyoung is offline eyoung  United States
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I am waiting with much excitement and anxiety.

That would be a bump, I Think...

keep me in the loop.

Elwood.
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"You are free to choose, but you are not free from the consequences of your choice!" So Choose wisely...
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Old 22nd April 2009, 06:05 AM   #25
CfM is offline CfM  Germany
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Quote:
Originally posted by Variac
What other radial caps are there that people might consider?, and what are their lead spacing and size?
Wima MKP10 - lead spacing 37,5 mm - width 20 mm
... would be my consideration.
But I could also go with axial caps as you proposed if this is the common agreement.


Chris
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Old 22nd April 2009, 06:23 AM   #26
Variac is offline Variac  United States
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Clearly cviller intends for it to work with a lot of caps. I think having your suggestion as an option is a good idea.
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Old 22nd April 2009, 06:25 AM   #27
cviller is offline cviller  Denmark
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I'm quite sure I have left space for 37.5 pin distance - if not it's a mistake.
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Old 22nd April 2009, 06:51 AM   #28
Variac is offline Variac  United States
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He's worried about the width too..
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Old 22nd April 2009, 06:53 AM   #29
Variac is offline Variac  United States
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WE HAVE CORRECTED THE ARTICLE

Now its Rev. 1.0 as suggested

Please check it out........

Thanks for your patience
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Old 22nd April 2009, 05:54 PM   #30
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Quote:
Originally posted by Nelson Pass
If you want more efficiency out of the all-N channel output stages,
we will expect to be doubling the efficiency in a later version.

By turning it into an A5?

- Eric
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