Brother of Quasi

quasi · 14th October 2006, 03:05 AM

Conceptualised in the thread "Power Amp Under Development" here is the transistor output stage variant.

http://www.diyaudio.com/forums/showt...429#post946429

A version has already been built by fellow diy'er Kraft and this thread is dedicated to the development of this version.

Cheers
Quasi

quasi · 14th October 2006, 03:10 AM

The schematic is of course very similar. Apart from the output stage other small changes were made to accomodate a workable layout.

Cheers
Q

quasi · 14th October 2006, 03:15 AM

Here is the board layout. It retains the famous U-channel heatsink for the second stage transistors

Please check it before you build.

Cheers
Q

quasi · 14th October 2006, 03:17 AM

Here are the tracks. This board also contains DC detection.

Cheers
Q

poobah · 14th October 2006, 03:18 AM

I hate people that try to be quasi quasi...

NO CIGAR!

Leolabs · 14th October 2006, 05:41 AM

Quote:

I hate people that try to be quasi quasi...

Why???Because you like to be symmetrical???

edl · 14th October 2006, 09:01 AM

Hi,

Hmmm... Such high power amp without short-circut protection?!
Then it's not intended for PA usage... Then for what?

quasi · 14th October 2006, 11:08 AM

Quote:

Originally posted by edl
Hi,

Hmmm... Such high power amp without short-circut protection?!
Then it's not intended for PA usage... Then for what?

It is intended as a powerful high quality domestic power amp. The reason for this thread is because there have been requests (forum and email) for a varient of the mos design that used conventional power transistors, particularly TO3 types.

So here it is. Anyone who wants to build it and take advantage of TO3 devices they have laying around may do so. Or they can choose not to.

Cheers
Q

mikeks · 14th October 2006, 12:49 PM

http://www.diyaudio.com/forums/showt...42#post1023742

mikeks · 14th October 2006, 12:50 PM

http://www.diyaudio.com/forums/showt...28#post1022628

14th October 2006, 03:05 AM	#1
quasi diyAudio Member Join Date: Sep 2004 Location: Adelaide, Australia	Brother of Quasi Conceptualised in the thread "Power Amp Under Development" here is the transistor output stage variant. http://www.diyaudio.com/forums/showt...429#post946429 A version has already been built by fellow diy'er Kraft and this thread is dedicated to the development of this version. Cheers Quasi __________________ http://sites.google.com/site/quasisdiyaudiosite/

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14th October 2006, 03:18 AM	#5
poobah diyAudio Member Join Date: Nov 2005	I hate people that try to be quasi quasi... NO CIGAR!

14th October 2006, 09:01 AM	#7
edl diyAudio Member Join Date: Oct 2004	Hi, Hmmm... Such high power amp without short-circut protection?! Then it's not intended for PA usage... Then for what?

14th October 2006, 12:49 PM	#9
mikeks Account Disabled Join Date: Jun 2004 Location: Animal farm	http://www.diyaudio.com/forums/showt...42#post1023742

14th October 2006, 12:50 PM	#10
mikeks Account Disabled Join Date: Jun 2004 Location: Animal farm	http://www.diyaudio.com/forums/showt...28#post1022628