BASICQWW balun originally designed by Guanella, Ruthroff and subsequently improved by Dr. Jerry Sevick (W2FMI). We have enhanced the original by using an enclosure and various connector configurations that allow easy installation with just about any antenna installation. BASICQWW baluns are value-engineered to provide maximum performance at minimum cost, while providing a superb, efficient match between unbalanced coax and balanced antennas. Only BASICQWW baluns will deliver the power to your antenna with minimum loss and perform a perfect transition from balanced to unbalanced. This will result in the strongest signal that your antenna is capable of producing consistently with the lowest SWR under given conditions and to provide a very high power rating across all HF frequencies.
 
W2FMI Series 1:1 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-50005
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 :   
   1:1
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 :   
   50 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