tube fancier after all.
I have hooked up headphones to the line amplifier and the sound is just about perfect, so how do I preserve as much of that sound as I can? One idea I have is to build a solid-state amplifier that adds no gain or feedback, which means that the line amplifier will do all of the voltage amplifying and the power amplifier will do all of the current providing.
The attached schematic shows two circuits: the first is a pure solid-state unity-gain buffer and the second is a hybrid buffer. What do you think of them? Which would be the better path to follow? Thanks in advance for your kind reply and the possible publishing my letter ;)
Tony, your first two emails were not published precisely because they were tube free, not because they failed to provoke interest.
The original intent of this journal was to mimic the Math CAD Journal, a magazine put out by the MathSoft people to asset users of their Math CAD program by providing math-related articles that illustrated how their software could be used. For example, users of Math CAD who explain how they found the program useful write many of the articles.
Well that was the intent, but the Tube CAD Journal went off in another direction altogether. Part of the reason was that many of the tube fanciers needed, as you pointed out, to be technically brought up to speed. Another part was my hope of expanding the tube-audio horizon, which I felt was collapsing into a few simple-minded topologies and practices.
In fact, you are not the first to recommend widening the journal's range of topics to include all audio related circuit devices and topologies. But I cannot see too great a need to cover pure solid-state topics when Elektor, Electronics World, audioXpress, and the solid-state manufacturers themselves (in their data books) do a good job on these topics. But then, maybe I am wrong on this. What do you, the readers, think? As for the circuits you submitted, you have an entire article as a reply...