M2 Antennas. M2 Antennas is dedicated to the science of antenna-building. The experts at M2 Antennas know and understand radio propagation. They avoid the potential pitfalls of typical antennas and build the best, most reliable antenna systems for your amateur communication needs. 40ft (2 PACK) TRI-SHIELD WEATHER SEAL Indoor Outdoor RG6 Coaxial Cable BRASS CONNECTOR 75 Ohm (Satellite TV, Broadband Internet, Ham Radio, OTA HD Antenna Coax) Assembled in USA by PHAT SATELLITE INTL. How to work amateur radio satellites with your handheld (HT) radio from moleculo on Vimeo. K7AGE also has lots of other videos about Amateur Radio. "BP" Stands for Back Pack - Two-piece Boom - Split boom.