Copper Monopole for the vertical antenna
The Engineering Web
Specify and build monopole ham antenna for the 20 meter band.
The first band to test will be 20 meters.
Copper plumbing from any local hardware store is the building material for this antenna. Copper pipe comes in several types:
- Type M copper pipe is thin-walled
- Type L copper pipe is medium-walled
- Type K copper pipe is thick-walled.
My local home store has the M and L. I choose the thicker L for a little more strength.
Taking tips from KL7JR I opted to use five foot lengths for the several band combinations. Lengths include:
|20 meters||197 inches|
|15 meters||140 inches|
|10 meters||100 inches|
The 20 meter example will look something like...