I have built power amplifiers and preamplifiers using SITs. My SIT power amplifiers include common source and common drain output stages. I also have a transformer interstage coupled SIT amp (source follower) with output transformer. Additionally, I have built preamps and amps using power JFETs.
As a DIYer and experimenter, I like to explore different devices and topologies. I find that trying things out of curiousity enjoyable and rewarding. Things don't always work out the way I think they would, but I learn a lot from it.
Even if it's been done before, building a circuit myself, testing it, and then modifying it, is a great experience. This is something that I don't get just by reading about it. That is probably why science courses in schools include laboratory work. Doing contributes greatly to learning and leads to new ideas.
So, to the Original Poster, I say, "Carry on". Build your transformer SIT amp, try different things, and enjoy the experience. Don't worry about what the neighbours will think.
As a DIYer and experimenter, I like to explore different devices and topologies. I find that trying things out of curiousity enjoyable and rewarding. Things don't always work out the way I think they would, but I learn a lot from it.
Even if it's been done before, building a circuit myself, testing it, and then modifying it, is a great experience. This is something that I don't get just by reading about it. That is probably why science courses in schools include laboratory work. Doing contributes greatly to learning and leads to new ideas.
So, to the Original Poster, I say, "Carry on". Build your transformer SIT amp, try different things, and enjoy the experience. Don't worry about what the neighbours will think.
@pinholer - thank you, my point exactly, doesn't matter what and when one did something, there's always room for improvements... 🙂 From my experience with tubes I know that OTLs (output transformerless) work beautifully on paper but in reality the listening experience isn't as cheerful... and of course this is because a very tight tuning of impedances and operating points is involved, same as when considering transistors...
@analog_sa ... you mean "step down" xfmr, in most of the cases, in order to "save" an OTL ... as in higher voltage, lower current, finding a more linear area of operation, what's so difficult to grasp? Finding a proper load line in accordance with 8 ohm speaker impedance is not so easy with tubes and I bet SSs can have better operating areas/points provided that an impedance conversion is properly employed.
Have it your way, of course, I'll dig further based on my misconceptions... 🙂
Have it your way, of course, I'll dig further based on my misconceptions... 🙂
No. i meant step up, referring to your schematic in post #1. It is a step up, right?
That is a "mild" step up, with lower THD than 1:1, in simulation at least... and by increasing the voltages can be as well a step down, but I didn't spend too much time playing with that simulation, just enough to see that above 10kHz a low impedance driver is needed 🙁