BALUN 4:1 12.5 Ω TO 50 Ω 1-75 MHZ 2KW COBWEBS, YAGI,NVIS EN FRANCE

4:1 Balun 12.5Ohms to 50Ohms This is a very hight-power unun (balanced to unbalanced) transmission line transformer  designed to match 50Ω  to 12.5Ω. It is capable of high power levels because it uses  low-impedance coaxial cable instead of wire-bifilar windings.  Thus the currents are distributed more evenly about the conductors.  The power rating is 2KW of continuous power and 5KW of peak power.  It has a constant impedance transformation ratio of 4:1 from 1MHz to 75MHz.  The efficiency is 99 percent. This balun is great for matching low impedance antennas such as Cobwebs, Yagi and NVIS dipoles mounted close to ground level.      Technical specification: Type:                                               4:1 Balun Frequency:                                      1MHz – 75MHz Input Impedance:                             50Ω Output Impedance:                          12.5Ω Typical insertion loss:                       less than 0.15 dB Minimum Choking Impedance:        1KΩ @ 1.8MHz Maximum Choking Impedance:       +5kΩ @ 20~60MHz Power Handling(CW/SSB):             2KW /3KW and 5KW of peak power Core Type:                                      FT240-43 by Fair-rite® Co. Wire type:                                           Coaxial cable  by HABIA CABLE®    Insulation type:                                PTFE   Performance See Performance Plots   Package Contents You get what you see. FT240-43 core by Fair-rite® winding with  Coaxial cable  by HABIA CABLE®    Assembled and tested.   SHIPPING We ship worldwide from French by Registered Air mail with tracking number. Your item will be shipped next business day once payment received. Delivery time depends on destination and Customs, usually it takes about 10-25 business days.