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! 
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.
I'll settle for just the rum
jd
I bet you would.
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....
Yes, I believe it does
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.
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