Hum on new build

Ken KM4NFQ
 

Greetings,

I am a new member.
I just finished building a Cricket 40.
Connected to a 40m Attic Dipole and a 9V battery, I hear a loud
background hum and CW.
Is the background hum normal?

Regards,
Ken, KM4NFQ "Not Fully Qualified"
https://groups.io/g/w8bhMorseTutor

Join CricketKit@4SQRP.groups.io to automatically receive all group messages.