F5 with lateral mosfets

[kacernator]

Hi,

I have been trying to make the F5 work with lateral mosfets. So far I cant biased them. What can be wrong? Here is the schematics I am using. Actually the voltages are +/- 30V.

Thank you.

 

[Itsmee]

What voltage do you have across R3 & R4?

+/-30V is probably too much for the little JFETS, datasheet says 25V max

 

[kacernator]

Nevermind, I have changed mosfets to IRF type, now its working allright.

Moderator please delete this thread.

Thank you.