4:1 Dual Core Current Balun 150W
£40.99 inc. tax
4:1 Dual Core Current Balun
The 4:1 Guanella Current balun is a low loss, broadband balun that will ideally choke off common mode currents entering the radio shack and importantly provide a transition from the un-balanced output to the balanced antenna coaxial feed line.
While using the balun to choke off common mode currents is best achieved at the antenna end of the feed line, this is not a practical arrangement for a balanced feed line systems
The 4:1 current balun is derived from two 1:1 current baluns with each consisting of a close double bifilar winding of 8 turns wound evenly spaced around the FT140-43 ferrite toroid core.
In the case of a 4:1 Guanella Current balun it's job is to transform an impedance of 200 ohms at the antenna to 50 ohms at the radio, 50 ohms being the common standard of impedance of most radio equipment at the antenna sockets.
Applications for a 4:1 current balun include Folded dipoles, OCF Dipoles, Delta Loops, Fullwave Square Loops. & most antennas that require a 200 ohm to 50 ohm impedance match to your radio.
Specifications
2 X FT140-43 Ferrite Cores
Ratio 4:1 200 ohms to 50 ohms
8 Turns per Core
Power rating 150W
So239 Connector
A2 Stainless Steel Lifting eyes
Enclosure L100mm W68mm H55mm
Weight 296g
Made in the UK by M1ECC-Antennas
