Perhaps those voices that "mired the thread" are just tired of fighting the wind mills? Anyway, if you press the right buttons, you may quickly get those voices back
Could I get a list of buttons? It might save time in the future. By the way, the windmills always won.
Could I get a list of buttons? It might save time in the future. By the way, the windmills always won.
Calling "various voices that mired the threads in the past" is a safe one. They'll be back, on the double.
Windmills can't win; they only spin.
Steve:
'Progress can only depend on the unreasonable man' - GB Shaw, 1904
Fashions and trends abound in science and technology, just like the fashion industry. The conventionalists control proceedings with high priesthoods and ridicule. Galileo and Copernicus come to mind. But it's hard to forget that Nikola Tesla was regarded as an eccentric fringe dweller, yet he gave us many high voltage techniques, the AC power grid, the AC induction motor, and many other inventions.
'Progress can only depend on the unreasonable man' - GB Shaw, 1904
Fashions and trends abound in science and technology, just like the fashion industry. The conventionalists control proceedings with high priesthoods and ridicule. Galileo and Copernicus come to mind. But it's hard to forget that Nikola Tesla was regarded as an eccentric fringe dweller, yet he gave us many high voltage techniques, the AC power grid, the AC induction motor, and many other inventions.
Perhaps your Dick Miller quote has given them pause.
Do you mean this?
That wasn't a quote, that is the last movie I know of that he was in.
Trail of the Screaming Forehead (2007)
Yes, I'm sure that was it. As far as the operation of this circuit goes there really is nothing to add to what Andy said in post 7 and showed quite clearly in his subsequent simulation plots.
And can't believe those who think this scheme works are still sticking that big cap between the driver bases, which absolutely guarantees reverse bias of the driver+output device b-e junctions at all but the lowest audio frequencies. Unreal!
I just tried to download that Intusoft demo package, but it is 48Mbyte - far too large for my 48000bps dial-up connection. I'll try it on a computer at work some time next week.
I just downloaded and installed it, and loaded Steve's file into it. Steve's file is a netlist and not a "drawing file" as Intusoft calls it, so it doesn't allow viewing the circuit in schematic form. The demo won't do a simulation either, as Steve's circuit exceeds its maximum allowed device count. On the plus side, the netlist has all the models embedded in it, allowing them to be ported to LTspice. But reverse engineering a schematic from a netlist is quite time-consuming.
Steve, would it be possible to post a graphic of the schematic used to generate that netlist? The schematic I saw in the demo had the node numbers clearly marked, which would allow quick reconstruction of the sim in LTspice, using the exact same models as are in the Intusoft netlist you posted.
No contradiction there.
Here is a run of the sim file posted by Andy in post 11:
http://www.diyaudio.com/forums/solid-state/151295-krill-next-generation-2.html#post1918262
I'm showing something different this time - the voltage at the base of the NPN driver along with the voltage at the emitter of the NPN output device, at 2kHz with a 4 ohm load.
On negative swings the B-E junctions are reverse biased, exactly as theory predicts.
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If you look at the Vbe of just the output device by itself though, it ends up being forward-biased when one might expect reverse bias. But its base when in that state is essentially open-circuited (except for strays), since the Vbe of its corresponding driver has a hard reverse bias. So the output device is kind of hanging in the breeze there. Its Vbe is forward biased, but only due to stored charge.
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