W2FMI Series 4:1 Current Type (choke) 500 watts Balun characteristics
Custom 798 Factory High Efficiency Low Permeability Ferrite with Coated Seal
Choose special wire sizes to provide high-quality insulation as well as accurate impedance matching
Suitable for all-amateur frequencies
Lower SWR
Eliminates common common-mode currents and emissions from feeders
Reduce transmission RFI and receive noise
The insertion loss is less than 0.05 dB
SO-239 nickel-plated connector with waterproof gasket and TEFLON insulation (silver-plated optional -C)
High standard waterproof box, long-term UV resistance
Convenient mounting holes
High purity stainless steel hardware
Three-year warranty
 
 Features ：
Part Number :   
   CQW-200005
Core Type :   
   Outstanding low permeability ferrite mix coated toroid core with special design for    maximum bandwidth by 798 Factory Product
Winding Type :   
   Single core/Dual wire
Winding Material :   
   Polyimide Coated Winding Wire(Essex ALLEX Class 240) provide exact impedance    matching and superb insulation, unlike common Thermaleze wire
Ratio :   
   4:1
Power Handling(CW/SSB) :   
   300 watts / 500 watts
Frequency Range :   
   1.8 to 54 MHz
Band of Operation :   
   160M - 6M
Insertion Loss :   
   Less than 0.05db
Termination Impedance :   
   200 Ohms
Termination Type :   
   M5 Studs/Hex nuts/Wing nuts
Connectors :   
   Gasketed SO-239 connectors are nickel-plated with Teflon insulation (option C silver    plated)
Hardware :   
   All Stainless Steel
Enclosure Type :   
   NEMA rated 4x junction box provide sturdy weatherproof and an additional level of    protection against corrosion
Dimensions :   
   3.2 in. x 2.5 in. x 1.6 in.
Additional :   
   Very high efficiency (98-99%)
Mounting Type :   
   Antenna Mounting Options are available in the Accessories section
Warranty :   
   Three years