TSSA V1.5

sonnya · 30th May 2012, 06:24 AM

Hi All.

As you know i have laid out the PCB TSSA V1.5.

I will be offering this PCB in three variants:

Bare PCB - €21/channel
PCB with SMT assembled €39/channel
PCB with all SMT assembled and all parts except heatsink - €102/channel
TSSA module assembled and test on a SK56 150mm heatsink - €253/channel

If there is any interrest mail me on audioparts@sitosite.dk

meanman1964 · 30th May 2012, 02:54 PM

maybe a dom question what's the output power of this amp?

sonnya · 30th May 2012, 03:37 PM

A safe value on a 25vac transformer would be 40watt into 8ohm

Salas · 30th May 2012, 03:44 PM

What can it do @ 4 Ohm, and are there any THD and FFT plots to show? BOM and CCT should be attached here too I guess.

sonnya · 30th May 2012, 07:49 PM

Hi Salas and Meanman1964.

I have attached the measurement.

I will post the schematic and bom as soon as i have tested it with the renesas mosfets

Joachim Gerhard · 30th May 2012, 09:16 PM

Interesting, it simulates to have more second and what comes out more is the third !
That goes lower when the wattage goes down.

Salas · 30th May 2012, 09:35 PM

Takes an Lpad to divide signal tapped off the 8R dummy so not to overload the interface's input and see at 1/3 nominal RMS power. That would be more like it in speakers. Square waves at such power would be nice too.

sonnya · 30th May 2012, 09:44 PM

To be honest, i am not satisfied with the ALF16N16W and ALF16P16W.

I have to make more measurements before i say more. But at higher level the starts to rise there vgs off region.

I have not seen it with Exicon ECX10N20 and ECX10P20.

It shows up as crossover into low loads. And when we lower the power level they cool of and the crossover disappears.

My first thought is that they cannot handle the power they are supposed to be handling. They are 250W package!!!!

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30th May 2012, 02:54 PM	#2
meanman1964 diyAudio Member Join Date: Oct 2006 Location: Belgium the land of chocolate	maybe a dom question what's the output power of this amp?

30th May 2012, 03:37 PM	#3
sonnya diyAudio Member Join Date: Oct 2001 Location: Denmark	A safe value on a 25vac transformer would be 40watt into 8ohm

30th May 2012, 03:44 PM	#4
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	What can it do @ 4 Ohm, and are there any THD and FFT plots to show? BOM and CCT should be attached here too I guess.

30th May 2012, 09:16 PM	#6
Joachim Gerhard diyAudio Member Join Date: Mar 2009	Interesting, it simulates to have more second and what comes out more is the third ! That goes lower when the wattage goes down.

30th May 2012, 09:35 PM	#7
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Takes an Lpad to divide signal tapped off the 8R dummy so not to overload the interface's input and see at 1/3 nominal RMS power. That would be more like it in speakers. Square waves at such power would be nice too.

30th May 2012, 09:44 PM	#8
sonnya diyAudio Member Join Date: Oct 2001 Location: Denmark	To be honest, i am not satisfied with the ALF16N16W and ALF16P16W. I have to make more measurements before i say more. But at higher level the starts to rise there vgs off region. I have not seen it with Exicon ECX10N20 and ECX10P20. It shows up as crossover into low loads. And when we lower the power level they cool of and the crossover disappears. My first thought is that they cannot handle the power they are supposed to be handling. They are 250W package!!!!