Open.Theremin V3 antenna problem

Dear All
I am building Open.Theremin V3, for me to learn Arduino using Arduino Uno
I have a little problem as video
I need to touch antenna in order to make sound , but, Theremin no need to touch antenna, where is my problem?

I record short video on youtube:

thanks again if anyone can help! stay safe.

Please read the first topic telling how to get the best from this Forum.
Your question lacks a lot so far.

Thanks Railroader! I delete the link and revise content after I read the rules, I don't know how to add more content as there are no code problem... thanks.

Forum handles more than coding issues.
Know that every helper is a newbie to You project. You need to present the technical background as well as what You intend to achieve and what's happening.

@lydialoveworld, your topic has been moved to a more suitable location on the forum.

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