[45philcodon]

Chas,

Thank you for all of the ideas you provided.

I don't understand what you mean by " a ten turn link made of solid hookup wire into a 2" diameter hank". Are you suggesting driving a coil of wire directly from the signal generator and then somehow inductively coupling to the grid? Is it sufficient to simply bring the coil near the tube to achieve coupling? I'm confused about this step. BTW, I was able to identify a peak when adjusting both trimmers but the radio acted unstable at these peak settings.

Thank you,

Don