FT240-43 UNUN 4:1 ((12.5 Ω TO 50 Ω) 1-54 MHZ 5KW COBWEBS, EN FRANCE

4:1 Unun 12.5Ohms to 50Ohms This is a very hight-power unun (unbalanced 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 5KW of continuous power and 10KW of peak power.  It has a constant impedance transformation ratio of 4:1 from 1MHz to 50MHz.  The efficiency is 99 percent     Technical specification: Type:                                               4:1 unun Frequency:                                      1MHz – 50MHz Input Impedance:                             50Ω Output Impedance:                          12.5Ω Typical insertion loss:                       less than 0.15 dB Power Handling(CW/SSB):             5KW /7KW and 10KW 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.   This transformer requires a feed line choke to isolate the coax feed line from the antenna.   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.