77 Series SPDT Switch These medium size, light-weight relays are designed and manufactured with gold plated RF contacts and silver plated outer conductors which give good RF performance to 1 GHz (Isolation is greater than 30 dB, Insertion loss is less than 0.15 dB). Available with either 50 Ohm BNC connectors or 75 Ohm type “F” connectors, the “T” shaped configuration has the common connector at one end of the RF cavity block and the N/O and N/C connectors 180° apart on the opposite end. Other options include type TNC connectors. Typical applications for the 77 Series include: • Military Communications • Commercial and Industrial Communications • CATV/MATV/CCTV Switching DowKey® 77 Series SPDT Switch RF Characteristics Specifications : Operating Voltage: (across temperature range) 12 Vdc (11-14 Vdc) 26.5 Vdc (24-32 Vdc) Coil Current (Nominal): 12 Vdc 171 mA 28 Vdc 96 mA Operate Time: 35 mS maximum Operating Temperature: 0ºC to +65ºC Mechanical Life, Cycles: 1 x 106 minimum Nominal Weight: 3.5 oz., (99g.) Frequency MHz VSWR (max) Isolation dB (min) Ins. Loss dB (max) RF Power Watts (CW) 50 100 400 1,000 1.05 1.10 1.20 1.50 50 45 40 30 0.03 0.04 0.10 0.15 150 100 75 50 Connectors and Part Numbers Nominal Coil Voltage Connector Type Standard SPDT SPDT wit 1 “C” Aux. Contact 12 Vdc 26.5 Vdc 115 Vac BNC BNC BNC 77-2202 77-2302 77-2602 77-220232 77-230232 77-260232 12 Vdc 26.5 Vdc 115 Vac F* F* F* 77-2232 77-2332 77-2632 77-227242 77-237242 77-263242 * Not recommended for use with RG-6 cable. 78 DowKey Microwave Corporation 1667 Walter Street, Ventura, California 93003 (805) 650-0260 • FAX (805) 650-1734 77 Series Mechanical Electrical 79 DowKey Microwave Corporation 1667 Walter Street, Ventura, California 93003 (805) 650-0260 • FAX (805) 650-1734