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Old 4th February 2009, 12:57 PM   #41
miklos is offline miklos  Canada
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Looking good Gabor. I wonder what you mean with Class D MosFet, I think the term Class D is referred to a switch mode amplifier.
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Old 4th February 2009, 01:06 PM   #42
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HI
The mosfet is Lateral type .
The company main product the class D amplifier was at the beginning . And now they call their mosfet Class D .
But really nothing to do with Class D .
You can find out more if you Google them or they even sell assembled kits on the forum .
Here is some info http://classd.ltd.uk/home.php
Greetings .
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Old 4th February 2009, 01:34 PM   #43
miklos is offline miklos  Canada
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I see, the company called Class D manufacturing these devices ACD100NSD/ACD102PSD. How well the N and P channel devices are matched?
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Old 4th February 2009, 02:02 PM   #44
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HI
I don't know , all I know after Renesans took over the manufacturing the Hitachi lateral mosfets I do not like them .
I never tested yet .
A have some 6 pair from Class D but I didn't did any test yet .
Before I used EXICON those are one of the best lateral if not the best .
I tested the Renesans in the ProFet , after I switch to Exicon heaven and earth the difference between them in favor of the Exicon .
At the class D company they wrote me these are close to the quality of Exicon .
I will see when I do some test .
But I need to make a enclosure for the amp after I can do some tests .
Greetings
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Old 4th February 2009, 02:42 PM   #45
miklos is offline miklos  Canada
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The enclosure is the hardest part of the diy.
Here's one of mine, cost me ca. 250 bucks and a lot of elbow grease.
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Old 4th February 2009, 06:30 PM   #46
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Quote:
Originally posted by gaborbela
...
The Iq to set up 400mA for the Grand Mos .
..... [/B]
400mA for one device or 400mA for whole amp?

I don't think about built this amp for now. I'am just curious. My problem with such amp is high idle current. With 2x50V, 400mA gives 40W - quite high. There is no any thermal feedback.
Also good mosfet are not cheap - another small problem.

But I cant stop thinking about this amp ...
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Old 4th February 2009, 06:40 PM   #47
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HI
I need to correct you .
These amplifier 100W/Chanel . 400mA /channel the Iq .
So that not so much .Only a couple Watt in Class A .
There are many amplifier give only 10W per side and biased in class A some of them close to 3A .
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Old 4th February 2009, 06:48 PM   #48
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Hello
I forget also U can run the amp in Class A/B mode .
These is a very high quality amp .
But if you want something more simple take a look at the Zenquito .From the same designer .
You can bias that in pure Class A or A/B to .
Much simple less parts and great sound if U use similar components like many DIY-ers did in France .http://pagesperso-orange.fr/jm.plantefeve/theo.html
You can open the site in English if you Google Zenquito DIY amplifier .
Regards
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Old 5th February 2009, 02:50 PM   #49
Xoc1 is offline Xoc1  United Kingdom
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Hi
I too amp very intrested in the performance of the Class D lateral mosfets
They are made by Semefab. Semefab also make the Exicon and Magnatec Lateral Mosfets
I came across the Semebab specifications for the acd100nsd and acd101ndd Mosfets and it is different to the spec published by Class D.
You can find it here

http://www.semefab.com.cn/acd100nsd.pdf

http://www.semefab.com.cn/acd102psd.pdf
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Old 1st March 2009, 06:40 PM   #50
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Hello, I am too interested in the GrandMos. I have a couple of Exicon pairs and I think I would like to use them in a simple topology like this one. I'd like to know if there are any stability issues with it and how well it performs.
Thanks in advance.
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