TSSA - The Simplest Symmetrical Amplifier

Lazy Cat · 4th April 2012, 02:42 AM

Schematic explains itself.

DJNUBZ · 4th April 2012, 03:03 AM

Have you built it? How does it sound?

Bigun · 4th April 2012, 03:19 AM

F5

Lazy Cat · 07:37 AM

FA

P.S. F5 with input BJT-s.

Lazy Cat · 4th April 2012, 07:39 AM

Quote:

Originally Posted by DJNUBZ

Have you built it? How does it sound?

As I was informed Mr. Nelson Pass built it. Everything what comes from him sounds perfect.

AKSA · 4th April 2012, 07:57 AM

Andrej,

I really like your simplification of the SSA. Very elegant.

Hugh

sonnya · 4th April 2012, 08:08 AM

Place those diodes on top of the mosfets (top diode on bottom mosfet and bottom diode ...).

Lazy Cat · 4th April 2012, 08:10 AM

Hi Aksa

Thanks, the credit goes to NP F5. Still it is also very close to basic SSA, somehow logical step to a really low parts count, still maintaining input BJT-s and to have bias/offset setting. I couldn't resist to draw it ...

Regards, Andrej

Lazy Cat · 4th April 2012, 08:15 AM

Quote:

Originally Posted by sonnya

Place those diodes on top of the mosfets (top diode on bottom mosfet and bottom diode ...).

You mean thermally?

Electrically diodes provide bias conditions for input BJT-s and thus for the whole amp. Output bias should be class-A.

buzzforb · 4th April 2012, 09:24 AM

Might have to try this one. See how the bjt compares to jfet.

4th April 2012, 03:03 AM	#2
DJNUBZ diyAudio Member Join Date: May 2003 Location: Chicago	Have you built it? How does it sound? __________________ My 3d printing startup, need something printed? Car Audio Connoisseur

4th April 2012, 03:19 AM	#3
Bigun diyAudio Member Join Date: Jan 2009 Blog Entries: 2	F5 __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

4th April 2012, 07:11 AM	#4
Lazy Cat diyAudio Member Join Date: Sep 2007	FA P.S. F5 with input BJT-s. Last edited by Lazy Cat; 4th April 2012 at 07:37 AM.

4th April 2012, 07:57 AM	#6
AKSA diyAudio Member Join Date: Sep 2001 Location: Melbourne, Australia	Andrej, I really like your simplification of the SSA. Very elegant. Hugh __________________ Aspen Amplifiers P/L (Australia) www.aksaonline.com

4th April 2012, 09:24 AM	#10
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Might have to try this one. See how the bjt compares to jfet. __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!


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4th April 2012, 08:08 AM	#7
sonnya diyAudio Member Join Date: Oct 2001 Location: Denmark	Place those diodes on top of the mosfets (top diode on bottom mosfet and bottom diode ...).

4th April 2012, 08:10 AM	#8
Lazy Cat diyAudio Member Join Date: Sep 2007	Hi Aksa Thanks, the credit goes to NP F5. Still it is also very close to basic SSA, somehow logical step to a really low parts count, still maintaining input BJT-s and to have bias/offset setting. I couldn't resist to draw it ... Regards, Andrej

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