Dear Wavebourn,
We do know you are crazy... 😀
(or at least I say to myself every time I see your posts: "those crazy Russians". And then I correct myself: "those crazy Polish")
We do know you are crazy... 😀
(or at least I say to myself every time I see your posts: "those crazy Russians". And then I correct myself: "those crazy Polish")
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How many people do you need to change a light bulb?
- 1001!
One is holding the bulb, 1000 are rotating the house! 😉
It's crazy, but i like it! 🙂
- 1001!
One is holding the bulb, 1000 are rotating the house! 😉
It's crazy, but i like it! 🙂
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That's part of the joke... 😛
Or if you don't like the idea of having a house without floor:
- 5 People. One is holding the bulb, 4 are rotating the ladder. 😀
Or if you don't like the idea of having a house without floor:
- 5 People. One is holding the bulb, 4 are rotating the ladder. 😀
Part of the joke is how does one solder 10k solder joints without going MAD?! 🙂
Now give me a board and a bottle of aged rum and I'll be lost for weeks.
Now give me a board and a bottle of aged rum and I'll be lost for weeks.
I cannot get rid of this picture: A long winter night, a cosy open fire, the wife is knitting and the husband is doing his own kind of diy-audio-embroidery... 😀
Enough lousy jokes! 🙂 It is almost eerie how Papa manages it to excite someones curiosity! New F2, J2, one of the BAs, the Beast - I want them all!
Enough lousy jokes! 🙂 It is almost eerie how Papa manages it to excite someones curiosity! New F2, J2, one of the BAs, the Beast - I want them all!
Does anyone have problems opening Nelson's graph from this post? On my PC it keeps saying "loading..." indefinitely.
jd
What about using smt jfets, in sot23 ? Linear are supposed to launch their LSJ74 soon, you could mount them on a thin PCB that you glue directly on a big heatsink.... Any thermal problem solved.
I know that Nelson don't like stuff he can't see, but it much easier to have a machine mount 1000's of smt parts....
I know that Nelson don't like stuff he can't see, but it much easier to have a machine mount 1000's of smt parts....
If we assume that the 588 jfets is for one channel in push-pull setup and unbalanced mode, driving into 8ohm load, then at 1W RMS each jfet will be driving a +/- 0.85mA (1.7mA pp) of load.
And it will be at 8Vpp.
Comparing with THD measurement of B1 buffer, this thousand JFET amp's performance seems to be too good.
The only explaination that I can think of is that the symmetrical output stage help to significantly cancel of the distortion.
Or else there could be some intellegent design in it, which I can't wait to see more details.
Distortion sounds not too far off, Borbeley's paper claims 0.0078% THD at 3V into 1Kohm with a single pair. 1W into 8 ohm is 2.8V, and 500 pairs into 8 ohm is like single pair into 4Kohm....
Søren
Søren
I'm not sure if the AP machine measures THD+N or not, but I'd imagine that most noise would be averaged out over so many pairs.
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