The Hy-Gain Model 70-30 SAT is a high-performance “OSCAR” (Orbiting Satellite Carrying Amateur Radio) satellite antenna for the 432-438 MHz frequency band. It features polarization switching circuitry for manual selection of either Right Hand Circular Polarization (RHCP) or Left Hand Circular Polarization (LHCP). This flexible design is suitable for worldwide applications with any of the amateur satellites having either an uplink or downlink in the 432-438 MHz frequency range such as AO-10, FO-12, AO-13, UO-14, AO16, LO-19, AO-21, UO-22, KO-23, etc. These include modes B, J, JA, JD, JL, L and S.
The 70-30 SAT antenna features 30 elements (total) on a 4.2 wavelength boom. Each set of 15 elements is designed to give 14.0 dBd gain based upon the NBS Tech Note 688. The 70-30 SAT also features high efficiency “Delta” matched driven elements for easy assembly and rugged durability. True RF 50 ohm switching relays are rated at 200 watts and contribute to improved VSWR. Feed points are encapsulated for long life in all types of climates.
Most hardware is stainless steel including the element pushnuts. All insulators are UV protected. The coaxial assemblies are made from high-quality Polytetrafluoroethylene (PTFE) dielectric and Fluorinated Propylene (FEP) jacketed coax cable. The 70-30 SAT “OSCAR” antenna can be used with the Hy-Gain 216 SAT 2-meter “OSCAR” antenna and the 217S fiberglass 5 foot boom, or it can be used with other commercial or homebrew “OSCAR” antennas. The 70-30 SAT antennas may be stacked for more gain.