Thunderstorms, Upper Atmospheric Electrical Discharges and Wind Driven Sand/Snow Static Voltages Can Cause Equipment Damage.However, Alpha Delta Has Many "Firsts" for Your Station Protection. Alpha Delta Communications, Inc. has been producing industry leading RF management products for the communications industry for over 30 years. Our coax surge protectors, surge protected coax switches and severe weather rated multi-band and single band HF antennas are ALL made in the U.S.A. In our ISO-9001 certified production facility for highest quality and reliability. When you select Alpha Delta, you select quality!