TSSA - The Simplest Symmetrical Amplifier

[Idefixes]

Originally Posted by Lazy Cat

Do you plan to use optional +/- 10 V rails for the front-end. It would be a significant improvement for a little cost involved, also the output's stage efficiency would go to maximum.

Perhaps in second time and depend how many space a can dispose in future case. I will see if i can plan it in case conception process. I will need +/-55Vdc to +/-60Vdc more supply. Are this power supply requierement same as SSA? For trafo option are easy. I can find trafo 10Va 2x21V. two of these with secondary in // give me 20Va 2x42Vac so 59Vdc max after rectifying. 2X24Vac ar more easy to find in much wider range of power but that give 2x48Vac with secondary in // so 67Vdc after rectifying.

Marc

[Lazy Cat]

Let's try with 100 ohm and 47 pF for the input low pass filter

[Idefixes]

Originally Posted by Lazy Cat

Let's try with 100 ohm and 47 pF for the input low pass filter

Ok noted in bom list...

Marc

[Lazy Cat]

Originally Posted by Idefixes

Perhaps in second time and depend how many space a can dispose in future case. I will see if i can plan it in case conception process. I will need +/-55Vdc to +/-60Vdc more supply. Are this power supply requierement same as SSA?

Marc

Yes, quite the same, from 5 to 10 V higher rails voltage potential and correct resistors values from the table chart. Serial diode MUR160 plus 22 ohm resistor can stay on PCB without any harm.

[Smiley 09]

LC

I'm very impressed with this nice ongoing thread, especially Marc is very intuitive here and I wonder to
congrats both of You for a really very nice and synergistic follow up the simple SSA to become an art.
Andrej I wonder to ask You from Yours enormous experiences which front end would be the best
for the bal. V12 engine to drive: the TSSA or SSA ?
Is the topology for inv. bal pin2 the same as is for the SSA?
After my experience with Nemo I listen music very rarely and wonder to chose the very best front end
for my bal. V12 which is in my slow progress obtaining all semis needed for the proto.
Which Tosh. VAS drivers would You suggest instead the IRF?
I attach the guessed bal. IP for the TSSA. Your sharp eye suggestion & comment would be much appreciated.
Thnx for the answ.

[Idefixes]

Originally Posted by Lazy Cat

Input BC's matching is also very important, as much hFE as possible and the same number for NPN/PNP. VAS KSA/KSC selection is also crucial, etc.

So i grown up my bom list and put in 100x BC550c/560c and 100x KSC3503/KSA1381 => sever amout of work to mesure all in prevision.

Marc

[sonnya]

I am sorry, i have off this thread for some time.

I have been working on a softstart unit for remote enable, or IR remote on/off with an idle current of less than 500mW for commercial amp design. It is a requirement from EU and it takes effect 2013. So it is more or less mandatory in new amps.

Marc: it is a nice work you have done (in eagle?) You must have been using a lot of hours on it.

[Idefixes]

Thanks sonnya, yes the work is done on eagle. I play with it since several year so i am relatively aware with this software and creating library in it. Yes it represent a bench of hours. Some people like building puzzle,....and i like spending time on doing layout...The Lazy Cat coaching made it a way more pleasent.

Marc

[Lazy Cat]

Hi guys

Of what I experienced today (SSA), I can guarantee that TSSA will rock hard and will do that in a refined way, just wait and hear, soon. I wish you all a lot of fun building TSSA amplifier, each and every second spent will be fully rewarded.

Regards Andrej

[Lazy Cat]

Originally Posted by sonnya

I am sorry, i have off this thread for some time.

I have been working on a softstart unit for remote enable, or IR remote on/off with an idle current of less than 500mW for commercial amp design. It is a requirement from EU and it takes effect 2013. So it is more or less mandatory in new amps.

Marc: it is a nice work you have done (in eagle?) You must have been using a lot of hours on it.

Will you be present in Munich on High End Show?