I think it will sound better with driver, 50 mA driver's bias, pure class A, 22 ohm gate-source of the output device, real impedance drive only. Total input stage isolation from the output current, can't do better than this in a simple manner. 😎
What stage of TSSA are you in Gerhard?
Very close but today is sunday and i have to prepare for the High End.
Some wiring and then i can test on the bench. Maybe today, maybe tomorrow.
Some wiring and then i can test on the bench. Maybe today, maybe tomorrow.
OK, no rush, tomorrow than. 😉
I also intend to visit the High End, celebration for the ears and eyes, best European show.
I also intend to visit the High End, celebration for the ears and eyes, best European show.
in simulation the driver does not improve distortion or distortion profile...more current seems better..It's a tricky beast and small changes means a lot...Think it needs a lot of IRL tweaking to get things right.
I am at the Fast Audio boot. You can see an interesting preamp with phono stage i designed. It has tone controls and a tube output stage.
MiiB, on the other hand even the simple version of post 1 just enhanched with depletion mosfet CCS sounds very, very good. It may more the energy storage we hear and not so much the distortion provided we have no high order or bad sounding intermodulation.
Anyway, you are right. The task is now to find the sweet spots.
Anyway, you are right. The task is now to find the sweet spots.
We can do more current with MOSFET Darlington too 😀
I think it will be better with drivers, especially these ones Gerhard has, these are the best. 😎
It would be interesting to here about your opinion Gerhard, since hearing both, super simple and now this one in the same system, that really counts the most. 😉
Yes, I can visit you both at High End, Miib probably at Raidho booth, not probably but sure. 🙂
Very good, it interests me to see it, especially ideas behind. 🙂
I thought you're more in speakers R&D, AP background. 🙄
I design speakers too but that is not a big challange any more after more then 40 years. The only things that are left is radiation pattern and mechanics for me. I do more electronics now.
Yes that latfet drivers are pretty famous for good sound.
Anyway, if there is interest i can build a second amp with high current and no drivers.
This amp already feels like an old friend to me. I am totally convinced that using the output laterals as current fed back current sources is the way to go. High feedback emitter or source followers have problems to drive a complex load. See the measurements in the new Stereoplay.
Yes that latfet drivers are pretty famous for good sound.
Anyway, if there is interest i can build a second amp with high current and no drivers.
This amp already feels like an old friend to me. I am totally convinced that using the output laterals as current fed back current sources is the way to go. High feedback emitter or source followers have problems to drive a complex load. See the measurements in the new Stereoplay.
One info interests me the most. What kind of speakers has the man now, with all that experiences and background of more than 4 decades. Please say something about your favourites, ie. you listen to nowadays.
I'll find to see that, interesting, thanks. 😉
2SJ76 and complementary.
MOQ is 1600pcs each.
So there is enough for 800 stereo pairs 😀
Delivery time : 20weeks
Price : ~1 - 1.5€/pcs
MOQ is 1600pcs each.
So there is enough for 800 stereo pairs 😀
Delivery time : 20weeks
Price : ~1 - 1.5€/pcs
I use high sensitive speakers at home. One is the Suesskind Sommerwind. It has a 30cm Von Langa fieldcoil in a 140 liter double wall cabinet and a special high sensitivity Mundorf AMT over 1,4 kHz. The other speaker is a G-Pole with 2 Enviee drivers and an active bass. That is an M-frame coupled to the backwall with a granite plate. I recycle the back EMF so that the bass drivers have no excess movement. I am preparing a patent.
You can see some of my setups on my MPL thread.
You can see some of my setups on my MPL thread.
Last edited:
Here you can buy smaller quantities but more expensive.
schulelektronik.de - elektronische Bauelemente - Transistoren - IC´s - STK - Kondensatoren - Widerstände
schulelektronik.de - elektronische Bauelemente - Transistoren - IC´s - STK - Kondensatoren - Widerstände
Hi Gerhard6800 uF feedback elcos 😱
Back to back to make up 3400uF NP. We can connect the negatives together (BP) or to connect the positive together (NP) as in Gerhard's and the sound is different. I don't know which one should go into which situation. The last time I tried BP sounded better.
No, this is not bipolar but of cause a bipolar can be made that way. I connect minus to minus usually.
Cyryl Bateman found out that this gives less distortion but a "real" bipolar like Nichicon Muse ES has even lover distortion.
Cyryl Bateman found out that this gives less distortion but a "real" bipolar like Nichicon Muse ES has even lover distortion.
TSSA Basic 1.5 - Update
Hi guys
Gerhard and Sonnya (and others if any interested) please look at change in schematic. 2200 uF/10 V capacitor added to feedback bridge (from TSSA BIGBT HP and SSA experiences) for extra distortions reduction. This elco decouple middle bridge DC from any AC being present because of unsymmetry, secondly it will cause our amp to raise bias slowly from firing-up, some sort of soft starting. Since this is symmetrical design we don't want anything to spoil our little symmetrical toy.
BTW how's P2P work standing now Gerhard, do I have to wave the finish
Hi guys
Gerhard and Sonnya (and others if any interested) please look at change in schematic. 2200 uF/10 V capacitor added to feedback bridge (from TSSA BIGBT HP and SSA experiences) for extra distortions reduction. This elco decouple middle bridge DC from any AC being present because of unsymmetry, secondly it will cause our amp to raise bias slowly from firing-up, some sort of soft starting. Since this is symmetrical design we don't want anything to spoil our little symmetrical toy.
BTW how's P2P work standing now Gerhard, do I have to wave the finish
