etherwave pitch antenna not responding

Hi all,

Total noob here. Just finished building my Etherwave theremin kit and the pitch antenna is not responding. I get a constant pitch no matter how near or far I position my hand. Volume antenna is working as expected.

I’ve tried different surfaces and a mic stand to no avail. Twiddling the pitch knob or tuning via the red plastic stick affects the pitch but regular playing movement does not.

Any advice?

Thanks!
Ryan