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Old 29th November 2001, 06:38 AM   #1
pkgum is offline pkgum  Australia
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for the 100W AKSA amp kit what power range(VA) should the DUAL transformers be?

the printed electronics website state that you have to have dual transformers rated at around 160VA for the 55W AKSA.

what about the 100W ASKA?
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Old 29th November 2001, 07:48 AM   #2
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For the 100w Aksa, according to the plans they should be around 300VA each. The AVEL LINDBERG Y236752 is recommended and it is a 2 x 35v, at 330VA transformer.
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Old 30th November 2001, 02:31 AM   #3
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Default Cherhit is Correct

I just received an e-mail two days ago from Hugh Dean of AKSA confirming this.
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Old 30th November 2001, 11:39 AM   #4
palesha is offline palesha  India
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I will like to see schematics of AKSA along with proper values. Can someone send me more information about the said circuit.
MP
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Old 30th November 2001, 02:10 PM   #5
mlloyd1 is offline mlloyd1  United States
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Default AKSA schematic?

Palesha:

From my message on Audio Asylum -
"Posted by mlloyd1 (A) on November 28, 2001 at 14:13:19
For folks that either own or have played with the AKSA 55W amp...
I've been looking at the "conceptual" schematic at http://sound.westhost.com/project61.htm
Assuming the voltage gain stage bootstrap cap (electrolytic C4 in project 61 above) still exists in the current design, I'm curious about:
1. How good is the bass really?
2. How well does the amp behave in overload/clipping/recovery conditions.
3. Anybody taken any of the various kinds of distortion measurements? I'm not looking to have debates about whether 0.000001% is sonically preferable to 0.1%; I'm curious about how the curves look vs. frequency.

Comments anybody?

Michael"

I saw responses from folks that indicated that this schematic was reasonably current.

Michael

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Old 30th November 2001, 03:24 PM   #6
palesha is offline palesha  India
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I know about this site. But they have not given the device numbers and componenets values & ratings. Hence this schematics is totally useless for us. We can only try it if we buy it. Hence of no use. That's why i asked for detailed schematics.
Mahendra Palesha
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Old 30th November 2001, 10:00 PM   #7
mlloyd1 is offline mlloyd1  United States
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grakatu:

I hear you! As I think about it, I guess that's kinda' where I'm comin' from too, with my original question to the asylum group. I remember seeing pretty much this same circuit in some books in high school (late 70's). Back then, I thought the bootstrap for the driver current source was clever. Certainly, Hugh has most likely done some great optimization and improvement has occured: R11 between the driver emitters, carefully selected operating points for the semiconductors, tweaking the PCB layout and the use of "sustained beta" output devices, as some examples. Maybe there is a lot of positive excitement about the AKSA because it is a good, trouble-free, first project for folks?

Michael
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Old 1st December 2001, 02:12 AM   #8
grataku is offline grataku  United States
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mlloyd,
sorry, I removed that post I sometimes write what I think on the spur of the moment, and get in trouble for it, so I decided to avoid the polemic for now. Though I was glad to see that you agreed with me!
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Old 1st December 2001, 02:35 PM   #9
ergo is offline ergo  Estonia
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The schematic with component values was available on Rod Elliots page before Hugh Dean began to sell AKSA kits. I have that version of the schematic printed out at home somewhere. I don't know if the current AKSA is the same but I suppose it hasn't changed too much.

The other question is, if it would be moral of me to make it public although it was some time back publicly available. I suppose if anyone is interested I can dig it up and mail to you. Just let me know....


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Old 1st December 2001, 07:15 PM   #10
palesha is offline palesha  India
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I am interested.
Mahendra Palesha
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