A copper gas pipe 20/30/40M Mag Loop

This antenna consists of:

• An so-239 connector
• Some copper sheating tabs
• 16.5ft. of 5/8" copper gas pipe
• 1ft. of 1/4" copper tubing
• A vacuum capacitor capable of tuning from arounf 0pf to just over 100pf
• A mast to support the antenna
• Several little fasteners and zip ties

to feed the antenna It’s made resonant via a vacuum capacitor which tunes the resonant frequency of the antenna. A nice feature of this antenna design is narrow bandwidth meaning that the antenna is effective only close to it’s resonant frequency.