Here's a 51-page thread answering that question:I am an idiot when it comes to jfet. It seems the 2SK170BL is hard to find. What is a suitable replacement here?
I've lost count how many times this question keeps getting asked. PLEASE USE THESE DEVICES Linear Systems Matched LSJ74/LSK170 JFET pairs (Grade B)
Wow, 63-pager actually. JFETs anger up the blood I guess.