Antenna Masts
AB-577/GRC
A 5" diameter military mast originally used for point-to-point microwave applications. Base mast is 50 feet with extension to 75 feet possible using the MK-806/GRC extension kit. We have sold hundreds of these units for amateur and commercial radio applications. These are no longer widely used by the military and the surplus supply has mostly dried up.
AB-621/G and AB-621A/G
The big brother of the AB-577, this is a 6 " diameter, 50 foot mast with significantly increased antenna load capacity. The mast is guyed in four directions. The more recent AB-621A/G is guyed in three directions and has an extension kit MK-2044/G to 100 feet.
We are out of complete masts and tubes, but do have some parts in stock. Contact us for additional information.
AB-155/U
A 40 foot military mast designed to support wire antennas. Commonly used with a variety of RTTY shelters.
AB-86/GRA-4
Another 40 foot military mast designed to support wire antennas or be used as a vertical antenna. Commonly used with a variety of RTTY shelters.
