Maandelijkse archieven: mei 2013

RF choke balun

To avoid common mode interference there are several designs to build an RF choke balun. I choose the one with ferrite cores sliding around a piece of Aircell7 coax.
The right ferrite cores, CST16/7.9/14-4S2, can you buy here. You need 20 pieces for one balun. The heatshrink i have use shrinks from 19 to 12mm.

This design is very simple to build. No high weight relative to general baluns in boxes and takes no space at all.