GM120 diy amp

bodopriva · 22nd February 2006, 08:47 PM

Hi
I found very interesting and professionaly done diy GM120 amplifier .
What do you think about topology of this one ?

Unfortunately there is no PCB layout - maybe someone could make new PCB for that amp ?

Warning ! Forum is in chinesse...

link for GM120

Very sorry for poor english

)

bodopriva · 22nd February 2006, 11:03 PM

link to the schematic of GM120:

http://www.diyzone.net/images2/GM0203SCH-1.pdf

and parts list:

http://www.diyzone.net/images2/GM0129BOM.XLS

ilimzn · 22nd February 2006, 11:49 PM

The FET input LTP should REALLY be cascoded to it's tail... otherwise, it's remarkably similar to many amps from the late 70s, (that should actually be a compliment

) except for the MOSFET output

SY · 23rd February 2006, 04:19 AM

The source of this schematic, if indeed it IS their schematic, is a company notorious for ripping off the designs, hard work, and creativity of others. Speaking as a member of this community, not on any official basis, I would encourage people NOT to visit that site or even consider spending a penny of money with them.

lineup · 23rd February 2006, 04:36 AM

Quote:

Originally posted by SY
The source of this schematic, if indeed it IS their schematic,
is a company notorious for ripping off the designs, hard work, and creativity of others.
Speaking as a member of this community, not on any official basis,
I would encourage people NOT to visit that site
or even consider spending a penny of money with them.

What company ??
And I promise I will not spend a penny!

With 'website', do you mean diyzone.net ??
If it is,
then is easy to avoid visiting links going there.
Besides, is too confusing with pages having "??????????" all over.

SY · 23rd February 2006, 04:40 AM

Yes.

mtlin12 · 23rd February 2006, 04:45 AM

DIYZONE ( a Taiwan DIY kits supplier) has sold out all GM120 kits.

DZ's PCB layout is quite interesting, like this a piggy-bag DC-servo.

If you can read Chinese, more pictures in here:
http://www.diyzone.net/article.php?sid=674

bodopriva · 23rd February 2006, 07:16 AM

So, how much is it ? Full or not soldered kit I mean. Is there possible to buy only PCB ?

Sorry I don't speak chinesse.

mtlin12 · 23rd February 2006, 07:45 AM

Quote:

Originally posted by bodopriva
So, how much is it ? Full or not soldered kit I mean. Is there possible to buy only PCB ?

Sorry I don't speak chinesse.

Full kit with case at NT9,999, it was about US$300.

But I think they will not sell bare PCBs, maybe you can ask their
boss Mr. Wu . limin_wu@diyzone.net

SY · 23rd February 2006, 10:53 AM

Whom do you think THIS design is stolen from?

23rd February 2006, 04:19 AM	#4
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	The source of this schematic, if indeed it IS their schematic, is a company notorious for ripping off the designs, hard work, and creativity of others. Speaking as a member of this community, not on any official basis, I would encourage people NOT to visit that site or even consider spending a penny of money with them. __________________ If there's a sucker born every minute, where do the rest of them come from?

23rd February 2006, 04:40 AM	#6
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	Yes. __________________ If there's a sucker born every minute, where do the rest of them come from?

23rd February 2006, 04:45 AM	#7
mtlin12 diyAudio Member Join Date: Nov 2003 Location: Taipei	DIYZONE ( a Taiwan DIY kits supplier) has sold out all GM120 kits. DZ's PCB layout is quite interesting, like this a piggy-bag DC-servo. If you can read Chinese, more pictures in here: http://www.diyzone.net/article.php?sid=674 __________________ EuLeit Audio Studio one of the best hi-end Amp design house in Taiwan http://www.euleitaudio.com

23rd February 2006, 10:53 AM	#10
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	Whom do you think THIS design is stolen from? __________________ If there's a sucker born every minute, where do the rest of them come from?

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22nd February 2006, 11:03 PM	#2
bodopriva diyAudio Member Join Date: Nov 2005	link to the schematic of GM120: http://www.diyzone.net/images2/GM0203SCH-1.pdf and parts list: http://www.diyzone.net/images2/GM0129BOM.XLS

22nd February 2006, 11:49 PM	#3
ilimzn diyAudio Member Join Date: Feb 2005 Location: Zagreb	The FET input LTP should REALLY be cascoded to it's tail... otherwise, it's remarkably similar to many amps from the late 70s, (that should actually be a compliment ) except for the MOSFET output

23rd February 2006, 07:16 AM	#8
bodopriva diyAudio Member Join Date: Nov 2005	So, how much is it ? Full or not soldered kit I mean. Is there possible to buy only PCB ? Sorry I don't speak chinesse.

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