TSSA V1.7 mosfet Current feedback amp module

[sonnya]

I hope this helps..

It is the connection diagram for the Softstart.

 

[awty]

Yes
thanks.

 

[awty]

Hi
What type and size capacitor do I use in c4 & c5?

 

[pdb]

Hi
What type and size capacitor do I use in c4 & c5?

I don't think you have to populate c4 and c5. They are left out on purpose as other capacitors were upgraded if I remember right. All for the benefit of SQ 🙂

 

[awty]

I don't think you have to populate c4 and c5. They are left out on purpose as other capacitors were upgraded if I remember right. All for the benefit of SQ 🙂

Well thats easy then thanks.

Ive finished building my copper box, just need to fit all the inner bits.

 

[pdb]

...Ive finished building my copper box...

Copper box... sounds serious 😉 Makes me think of Japanese highend stuff from the good old days 🙂

 

[awty]

Copper box... sounds serious 😉 Makes me think of Japanese highend stuff from the good old days 🙂

Oh, I think you'll be seriously disappointed then. My stuff looks more like something you'd find at the tip 😉.

Have to wait. Will put up some photos when its finished. It wont quite look like anything you have seen before.

 

[pdb]

... It wont quite look like anything you have seen before.

Sounds even better 🙂

 

[pdb]

For the frontpanel - Please look here.... http://www.diyaudio.com/forums/vend...d-display-diy-audio-projects.html#post4409288

 

[awty]

All finished.

Thanks Sonny for such a great sounding amp.

 

[pdb]

All finished.

Thanks Sonny for such a great sounding amp.

Oh me, oh my.... What an incredible enclosure... Are we talking 18th or 19th century here? By far the most creatively executed amp enclosure I have ever seen. Looks really nice and tidy inside too. Congrats 🙂

 

[Myint67]

Really nice,amazing job

 

[sonnya]

All finished.

Thanks Sonny for such a great sounding amp.

Cool .. Very cool! 😀

 

[Salas]

Steampunk TSSA looks good

 

[awty]

Thanks guys. Im pretty happy with the way it turned out, kinda make it up as I go. Made shades for the LED's and tude so at night time there not so bright.

It gave me something to do while I waited for the kit to get here and such a good amp deserves a nice box.

 

[awty]

Hi again

What is a suitable pre-amp or type of pre for this amp?

 

[sonnya]

It will be available shortly.

We will receive the frontpanel today.

The preamp will arrive by the end of this month.

BR

Sonny

 

[rogerchou]

Hi Sonny, would you mind show us your preamp design in advance? Many thanks.

 

[sonnya]

Hello

Rogerchou.

I would but i have redesignet the frontend today.

The frontend did have 12dB gain. It is not reduced to 0dB and the attenuator is changed to -80 to +12dB instead of -90 to 0dB.

I was a bit worried that an MM pickup would be able to hit the voltage Limit.

The MM pickup phono stage has 40dB gain. The attached is the riaa curve of the phono stage. It is a two stage design as i do not want to overload the frontend.

The gain is not ~59dB but 40dB. But the deviation fits.

The overload performance is 84mVrms@1KHz.

The opamps has jfet inputs and resistors is in worst case 10K. So noiselevel will be low. Capacitors are 330nF, 100nF and 10nF. AC coupling capacitor is polymer.. Same type as in the AK4490 DAC and the TSSA V4/V8 amp.

 

[sonnya]

Riaa curves with 1% capacitors and 3% capacitors...

You can see the deviation is a lot bigger with 3% tollerance but still below +/-0.4dB