Tam/WB2TT wrote:

I have never seen clipping. These things are supposed to limit in
cutoff, not saturation. As the signal build up, the conduction angle
gets smaller and smaller until the device runs out of gain. That is
another way of saying that the DC value of the gate voltage gets more
negative the bigger the amplitude. This works out automatically with
a JFET. You need about 10K - 100K DC resistance from gate to ground.
Using a bipolar transistor is not a good idea.

I have now changed it to an MPF102 that I've had laying around for many
years. It works great, thanks.
:-)