Designed to complement our Portable EFHW antennas this common mode choke is built with a T-140-43 core with two BNC female connectors.  Enclosed in a 3d printed case. 
 
Perfect for portable operations when using higher than QRP powers.  Equally happy in your shack to help eliminate QRM picked up on your coax or feedline.
 
The choke is would as a "Guanella" choke with reduced interwinding capacitance, limiting the risk of common mode resonances, whilst maintaining sufficient impedance across the HF bands.
 
Suitable for up to 100W
Size 5cm x 12cm x 2.5cm
Weight approx. 94g 3.3oz, +- a little
Choke impedance exceeds 30db from 3.5mhz to 30mhz, peaking at 38db on the 20m band
Less than 0.2db insertion loss
SWR lower than 1:035 (peaking at the 10m band) from 1mhz to 30mhz.
 
This CMC can be placed near your transceiver or near the feed point of your antenna.
 
If you need a BNC Patch lead, please remember to add one to your cart.
 
If you are using an End Feed Half Wave antenna without a counterpoise, please ensure this choke is at .05 wavelength from your EFHW antenna.