260 Series DPDT Switch 260B Series By-Pass Switch The DowKey 260 Series is a standard DPDT switch with six connectors, allowing two of four straight-through paths from two inputs. The 260B is identical in construction, except that there is an internal connection between the N/C contacts, leaving only four connectors. The 260B Series is widely used to insert or by-pass a circuit element (such as an amplifier or filter) in a transmission path between two normally connected elements. Both are available with a choice of actuator coils, connector options, and a pair of form “C” auxiliary contacts. Typical applications for the 260 & 260B Series include: • Inserting a Linear Amplifier Between an Exciter and an Antenna • Filter, Attenuator, or Amplifier By-Pass Switching • Insert Filters or Attenuators in a Transmission Path • Dual Simultaneous Transmit/Receive or Antenna Switching DowKey® 260 Series DPDT & 260B Series By-Pass 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 250 mA 26.5 Vdc 110 mA Operate Time: 25 mS maximum Operating Temperature: 0ºC to +65ºC Mechanical Life, Cycles: 1 x 106 minimum Nominal Weight: 12..0 oz., (340g.) Frequency MHz VSWR (max) Isolation dB (min) Ins. Loss dB (max) RF Power Watts (max) 0-50 50-100 100-400 400-1,000 1.05 1.08 1.15 1.20 40 35 25 18 0.04 0.05 0.10 0.15 1,000 1,000 1,000-500 500-350 Connectors and Part Numbers Nominal Coil Voltage Connector Type DPDT with 2 “C” Ind. Contacts By-Pass with 2 “C” Ind. Contacts 12 Vdc 26.5 Vdc 115 Vac N N N 260-2201 260-2301 260-2601 260-220142 260-230142 260-260142 260B-2201 260B-2301 260B-2601 260B-220142 260B-230142 260B-260142 12 Vdc 26.5 Vdc 115 Vac BNC BNC BNC 260-2202 260-2302 260-2602 260-220242 260-220242 260-220242 260B-2202 260B-2202 260B-2202 260B-220242 260B-220242 260B-220242 12 Vdc 26.5 Vdc 115 Vac UHF* UHF* UHF* 260-2204 260-2304 260-2604 260-220442 260-230442 260-260442 260B-2204 260B-2304 260B-2604 260B-220442 260B-230442 260B-260442 *Not recommended for applications above 300 MHz. 92 DowKey Microwave Corporation 1667 Walter Street, Ventura, California 93003 (805) 650-0260 • FAX (805) 650-1734 260 Series Mechanical Electrical 93 DowKey Microwave Corporation 1667 Walter Street, Ventura, California 93003 (805) 650-0260 • FAX (805) 650-1734