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Old 4th April 2012, 02:42 AM   #1
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Lightbulb TSSA - The Simplest Symmetrical Amplifier

Schematic explains itself.
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Old 4th April 2012, 03:03 AM   #2
JZatopa is offline JZatopa  United States
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Have you built it? How does it sound?
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Old 4th April 2012, 03:19 AM   #3
Bigun is online now Bigun  Canada
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F5
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Old 4th April 2012, 07:11 AM   #4
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FA

P.S. F5 with input BJT-s.

Last edited by Lazy Cat; 4th April 2012 at 07:37 AM.
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Old 4th April 2012, 07:39 AM   #5
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Quote:
Originally Posted by DJNUBZ View Post
Have you built it? How does it sound?
As I was informed Mr. Nelson Pass built it. Everything what comes from him sounds perfect.
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Old 4th April 2012, 07:57 AM   #6
AKSA is offline AKSA  Australia
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Andrej,

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

Hugh
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Old 4th April 2012, 08:08 AM   #7
sonnya is offline sonnya  Denmark
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Place those diodes on top of the mosfets (top diode on bottom mosfet and bottom diode ...).
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Old 4th April 2012, 08:10 AM   #8
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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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Old 4th April 2012, 08:15 AM   #9
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Quote:
Originally Posted by sonnya View Post
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.
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Old 4th April 2012, 09:24 AM   #10
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Might have to try this one. See how the bjt compares to jfet.
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