Help with JFET buffer!

[formula 22]

Hello all!
Help about the schematics for JFET buffer .
Signs need schematic JFET buffer that uses a symmetric power supply Us=+/-(9...12) Vdc.
tanks and cheers

[AndrewT]

Look up the PASS site. He has a complete description of a working example of a jFET buffer.

[juma]

Originally Posted by formula 22

Hello all!
Help about the schematics for JFET buffer .
Signs need schematic JFET buffer that uses a symmetric power supply Us=+/-(9...12) Vdc.
tanks and cheers

SE or push-pull (complementary) ?
What's the maximum voltage swing at the output ?
What's the input impedance of the next stage ?

Something like this (post #73):
http://www.diyaudio.rs/topic/4348-va...post__p__97060

[formula 22]

Originally Posted by AndrewT

Look up the PASS site. He has a complete description of a working example of a jFET buffer.

Please be specific.

[homemodder]

This one is hard to beat in sound and measurement, designed by JLH back in the 80s. Use 2sk170 and 2sj74 as the Jfets but the ones shown and others will also work but with lesser performance. If you bias the slave bjts hard it will happily serve as headphone amp too with very low distortion for phones with as low as 100 ohm impedances.

Look at figure 3 or the buffer at the bottom of this page. http://www.tcaas.btinternet.co.uk/jlhphones.htm