AUDIO GUITAR mosfet input guitar buffer

Purpose: Front end to effects that'll provide a high Z or impedance input that won't load a passive pickup based guitar down. Additionally this stage has to provide a small gain. Background: recently it has become practically impossible to get jfet transistors such as the J201 or MPF102 etc. These are by no means the only through hole components being phased out. Almost all through hole components are earmarked for termination. It's a stupid move orchestrated by big industry. I don't have anything against surface mounted components but in many cases they are less appropriate. This circuit performs most if not all of the job that the equivalent JFET circuit would do. Some will argue that it isn't as warm a sound and a whole load of other esoteric subjective bricks might be thrown at me. However, I have been testing this and other small signal circuits using guitars and amplifiers that I know very well. The result is great! Yes I can hear a Difference but It's better! Like all my recent EC contributions, this circuit has a resistor in the path from the signal generator. @hurz helped me by demonstration of the fact that the EC signal generator will sink unlimited current. Actually in this circuit it probably wouldn't make much difference. I now put a resistor in the path on all circuits